alphatWallBoilingWallFunction: Check if saturationModel is found
ThermalPhaseChangePhaseSystem enables phase change for phase pairs that have saturationModels. This change makes alphatWallBoilingWallFunction work in the same way; i.e., it disables evalulation of the wall boiling models if a saturation model is not found. Patch contributed by Juho Peltola, VTT.
This commit is contained in:
Will Bainbridge
@ -311,6 +311,7 @@ void alphatWallBoilingWallFunctionFvPatchScalarField::updateCoeffs()
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}
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case liquidPhase:
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{
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// Check that nucleationSiteModel has been constructed
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if (!nucleationSiteModel_.valid())
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{
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@ -342,333 +343,363 @@ void alphatWallBoilingWallFunctionFvPatchScalarField::updateCoeffs()
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const phaseModel& vapor(fluid.phases()[otherPhaseName_]);
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// Retrieve turbulence properties from models
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const phaseCompressibleTurbulenceModel& turbModel =
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db().lookupObject<phaseCompressibleTurbulenceModel>
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(
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IOobject::groupName
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(
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turbulenceModel::propertiesName,
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liquid.name()
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)
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);
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const phaseCompressibleTurbulenceModel& vaporTurbModel =
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db().lookupObject<phaseCompressibleTurbulenceModel>
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(
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IOobject::groupName
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(
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turbulenceModel::propertiesName,
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vapor.name()
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)
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);
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const nutWallFunctionFvPatchScalarField& nutw =
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nutWallFunctionFvPatchScalarField::nutw(turbModel, patchi);
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const scalar Cmu25(pow025(nutw.Cmu()));
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const scalarField& y = turbModel.y()[patchi];
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const tmp<scalarField> tmuw = turbModel.mu(patchi);
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const scalarField& muw = tmuw();
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const rhoThermo& lThermo = liquid.thermo();
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const rhoThermo& vThermo = vapor.thermo();
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const tmp<scalarField> talphaw = lThermo.alpha(patchi);
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const scalarField& alphaw = talphaw();
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const tmp<volScalarField> tk = turbModel.k();
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const volScalarField& k = tk();
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const fvPatchScalarField& kw = k.boundaryField()[patchi];
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const fvPatchVectorField& Uw =
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turbModel.U().boundaryField()[patchi];
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const scalarField magUp(mag(Uw.patchInternalField() - Uw));
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const scalarField magGradUw(mag(Uw.snGrad()));
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const fvPatchScalarField& rhoLiquidw =
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turbModel.rho().boundaryField()[patchi];
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const fvPatchScalarField& rhoVaporw =
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vaporTurbModel.rho().boundaryField()[patchi];
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const fvPatchScalarField& Tw =
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lThermo.T().boundaryField()[patchi];
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const scalarField Tc(Tw.patchInternalField());
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const scalarField uTau(Cmu25*sqrt(kw));
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const scalarField yPlus(uTau*y/(muw/rhoLiquidw));
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const scalarField Pr(muw/alphaw);
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// Molecular-to-turbulent Prandtl number ratio
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const scalarField Prat(Pr/Prt_);
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// Thermal sublayer thickness
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const scalarField P(this->Psmooth(Prat));
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const scalarField yPlusTherm(this->yPlusTherm(nutw, P, Prat));
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tmp<volScalarField> tCp = lThermo.Cp();
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const volScalarField& Cp = tCp();
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const fvPatchScalarField& Cpw = Cp.boundaryField()[patchi];
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// Saturation temperature
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const saturationModel& satModel =
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db().lookupObject<saturationModel>
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if
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(
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db().foundObject<saturationModel>
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(
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IOobject::groupName
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(
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"saturationModel",
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phasePair(vapor,liquid).name()
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)
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);
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const tmp<volScalarField> tTsat =
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satModel.Tsat(lThermo.p());
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const volScalarField& Tsat = tTsat();
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const fvPatchScalarField& Tsatw(Tsat.boundaryField()[patchi]);
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const scalarField Tsatc(Tsatw.patchInternalField());
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const fvPatchScalarField& pw =
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lThermo.p().boundaryField()[patchi];
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const fvPatchScalarField& hew =
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lThermo.he().boundaryField()[patchi];
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scalarField liquidHaw(lThermo.ha(Tc, patchi));
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scalarField vaporHaw(vThermo.ha(Tsatw, patchi));
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if (volatileSpecie != "none" && isA<rhoReactionThermo>(lThermo))
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)
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)
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{
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const basicSpecieMixture& composition =
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refCast<const rhoReactionThermo>(lThermo).composition();
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liquidHaw =
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composition.Ha
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// Retrieve turbulence properties from models
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const phaseCompressibleTurbulenceModel& turbModel =
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db().lookupObject<phaseCompressibleTurbulenceModel>
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(
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composition.species()[volatileSpecie],
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pw,
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Tc
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IOobject::groupName
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(
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turbulenceModel::propertiesName,
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liquid.name()
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)
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);
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}
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if (volatileSpecie != "none" && isA<rhoReactionThermo>(vThermo))
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{
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const basicSpecieMixture& composition =
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refCast<const rhoReactionThermo>(vThermo).composition();
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vaporHaw =
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composition.Ha
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const phaseCompressibleTurbulenceModel& vaporTurbModel =
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db().lookupObject<phaseCompressibleTurbulenceModel>
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(
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composition.species()[volatileSpecie],
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pw,
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Tsatw
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IOobject::groupName
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(
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turbulenceModel::propertiesName,
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vapor.name()
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)
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);
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}
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const scalarField L(vaporHaw - liquidHaw);
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const nutWallFunctionFvPatchScalarField& nutw =
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nutWallFunctionFvPatchScalarField::nutw(turbModel, patchi);
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// Liquid phase fraction at the wall
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const scalarField liquidw(liquid.boundaryField()[patchi]);
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const scalar Cmu25(pow025(nutw.Cmu()));
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const scalarField fLiquid(partitioningModel_->fLiquid(liquidw));
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const scalarField& y = turbModel.y()[patchi];
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// Convective thermal diffusivity
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alphatConv_ = calcAlphat(alphatConv_);
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const tmp<scalarField> tmuw = turbModel.mu(patchi);
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const scalarField& muw = tmuw();
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label maxIter(10);
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for (label i=0; i<maxIter; i++)
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{
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// Liquid temperature at y+=250 is estimated from logarithmic
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// thermal wall function (Koncar, Krepper & Egorov, 2005)
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const scalarField Tplus_y250
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(
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Prt_*(log(nutw.E()*250)/nutw.kappa() + P)
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);
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const rhoThermo& lThermo = liquid.thermo();
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const rhoThermo& vThermo = vapor.thermo();
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const scalarField Tplus
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(
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Prt_*(log(nutw.E()*yPlus)/nutw.kappa() + P)
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);
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const tmp<scalarField> talphaw = lThermo.alpha(patchi);
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const scalarField& alphaw = talphaw();
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const scalarField Tl
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(
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max
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const tmp<volScalarField> tk = turbModel.k();
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const volScalarField& k = tk();
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const fvPatchScalarField& kw = k.boundaryField()[patchi];
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const fvPatchVectorField& Uw =
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turbModel.U().boundaryField()[patchi];
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const scalarField magUp(mag(Uw.patchInternalField() - Uw));
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const scalarField magGradUw(mag(Uw.snGrad()));
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const fvPatchScalarField& rhoLiquidw =
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turbModel.rho().boundaryField()[patchi];
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const fvPatchScalarField& rhoVaporw =
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vaporTurbModel.rho().boundaryField()[patchi];
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const fvPatchScalarField& Tw =
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lThermo.T().boundaryField()[patchi];
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const scalarField Tc(Tw.patchInternalField());
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const scalarField uTau(Cmu25*sqrt(kw));
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const scalarField yPlus(uTau*y/(muw/rhoLiquidw));
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const scalarField Pr(muw/alphaw);
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// Molecular-to-turbulent Prandtl number ratio
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const scalarField Prat(Pr/Prt_);
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// Thermal sublayer thickness
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const scalarField P(this->Psmooth(Prat));
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const scalarField yPlusTherm(this->yPlusTherm(nutw, P, Prat));
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const scalarField Cpw = lThermo.Cp(Tw, patchi);
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// Saturation temperature
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const saturationModel& satModel =
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db().lookupObject<saturationModel>
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(
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Tc - 40,
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Tw - (Tplus_y250/Tplus)*(Tw - Tc)
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)
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);
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IOobject::groupName
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(
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"saturationModel",
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phasePair(vapor,liquid).name()
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)
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);
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// Bubble departure diameter:
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dDep_ = departureDiamModel_->dDeparture
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(
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liquid,
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vapor,
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patchi,
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Tl,
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Tsatw,
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L
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);
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const tmp<volScalarField> tTsat =
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satModel.Tsat(lThermo.p());
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// Bubble departure frequency:
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const scalarField fDep
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(
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departureFreqModel_->fDeparture
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const volScalarField& Tsat = tTsat();
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const fvPatchScalarField& Tsatw(Tsat.boundaryField()[patchi]);
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const scalarField Tsatc(Tsatw.patchInternalField());
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const fvPatchScalarField& pw =
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lThermo.p().boundaryField()[patchi];
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const fvPatchScalarField& hew =
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lThermo.he().boundaryField()[patchi];
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scalarField liquidHaw(lThermo.ha(Tc, patchi));
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scalarField vaporHaw(vThermo.ha(Tsatw, patchi));
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if (volatileSpecie != "none" && isA<rhoReactionThermo>(lThermo))
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{
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const basicSpecieMixture& composition =
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refCast<const rhoReactionThermo>(lThermo).composition();
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liquidHaw =
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composition.Ha
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(
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composition.species()[volatileSpecie],
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pw,
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Tc
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);
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}
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if (volatileSpecie != "none" && isA<rhoReactionThermo>(vThermo))
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{
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const basicSpecieMixture& composition =
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refCast<const rhoReactionThermo>(vThermo).composition();
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vaporHaw =
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composition.Ha
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(
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composition.species()[volatileSpecie],
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pw,
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Tsatw
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);
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}
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const scalarField L(vaporHaw - liquidHaw);
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// Liquid phase fraction at the wall
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const scalarField liquidw(liquid.boundaryField()[patchi]);
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const scalarField fLiquid(partitioningModel_->fLiquid(liquidw));
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// Convective thermal diffusivity
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alphatConv_ = calcAlphat(alphatConv_);
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label maxIter(10);
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for (label i=0; i<maxIter; i++)
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{
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// Liquid temperature at y+=250 is estimated from
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// logarithmic thermal wall function (Koncar, Krepper &
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// Egorov, 2005)
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const scalarField Tplus_y250
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(
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Prt_*(log(nutw.E()*250)/nutw.kappa() + P)
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);
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const scalarField Tplus
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(
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Prt_*(log(nutw.E()*yPlus)/nutw.kappa() + P)
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);
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const scalarField Tl
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(
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max
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(
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Tc - 40,
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Tw - (Tplus_y250/Tplus)*(Tw - Tc)
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)
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);
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// Bubble departure diameter:
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dDep_ = departureDiamModel_->dDeparture
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(
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liquid,
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vapor,
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patchi,
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Tl,
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Tsatw,
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L,
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dDep_
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)
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);
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// Nucleation site density:
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const scalarField N
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(
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nucleationSiteModel_->N
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(
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liquid,
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vapor,
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patchi,
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Tl,
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Tsatw,
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L,
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dDep_,
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fDep
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)
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);
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// Area fractions:
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// Del Valle & Kenning (1985)
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const scalarField Ja
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(
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rhoLiquidw*Cpw*(Tsatw - Tl)/(rhoVaporw*L)
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);
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const scalarField Al
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(
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fLiquid*4.8*exp( min(-Ja/80, log(vGreat)))
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);
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scalarField A2(min(pi*sqr(dDep_)*N*Al/4, scalar(1)));
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const scalarField A1(max(1 - A2, scalar(1e-4)));
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scalarField A2E(min(pi*sqr(dDep_)*N*Al/4, scalar(5)));
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if (volatileSpecie != "none" && !liquid.pure())
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{
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const volScalarField& Yvolatile = liquid.Y(volatileSpecie);
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A2E *= Yvolatile.boundaryField()[patchi];
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A2 *= Yvolatile.boundaryField()[patchi];
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}
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// Volumetric mass source in the near wall cell due to the
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// wall boiling
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dmdtf_ =
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(1 - relax_)*dmdtf_
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+ relax_*(1.0/6.0)*A2E*dDep_*rhoVaporw*fDep*AbyV_;
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// Volumetric source in the near wall cell due to the wall
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// boiling
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dmdtLf_ = dmdtf_*L;
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// Quenching heat transfer coefficient
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const scalarField hQ
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(
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2*(alphaw*Cpw)*fDep
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*sqrt
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(
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(0.8/max(fDep, small))/(pi*alphaw/rhoLiquidw)
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)
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);
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// Quenching heat flux
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qq_ = (1 - relax_)*qq_ + relax_*(A2*hQ*max(Tw - Tl, scalar(0)));
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// Effective thermal diffusivity that corresponds to the
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// calculated convective, quenching and evaporative heat fluxes
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operator==
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(
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(
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A1*alphatConv_
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+ (qq_ + qe())/max(hew.snGrad(), scalar(1e-16))
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)
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/max(liquidw, scalar(1e-8))
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);
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scalarField TsupPrev(max((Tw - Tsatw), scalar(0)));
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const_cast<fvPatchScalarField&>(Tw).evaluate();
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scalarField TsupNew(max((Tw - Tsatw), scalar(0)));
|
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scalar maxErr(max(mag(TsupPrev - TsupNew)));
|
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if (debug)
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{
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const scalarField qc
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(
|
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fLiquid*A1*(alphatConv_ + alphaw)*hew.snGrad()
|
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L
|
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);
|
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const scalarField qEff
|
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// Bubble departure frequency:
|
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const scalarField fDep
|
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(
|
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liquidw*(*this + alphaw)*hew.snGrad()
|
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departureFreqModel_->fDeparture
|
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(
|
||||
liquid,
|
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vapor,
|
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patchi,
|
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Tl,
|
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Tsatw,
|
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L,
|
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dDep_
|
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)
|
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);
|
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|
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Info<< " L: " << gMin(L) << " - " << gMax(L) << endl;
|
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Info<< " Tl: " << gMin(Tl) << " - " << gMax(Tl) << endl;
|
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Info<< " N: " << gMin(N) << " - " << gMax(N) << endl;
|
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Info<< " dDep_: " << gMin(dDep_) << " - "
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<< gMax(dDep_) << endl;
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Info<< " fDep: " << gMin(fDep) << " - "
|
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<< gMax(fDep) << endl;
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Info<< " Al: " << gMin(Al) << " - " << gMax(Al) << endl;
|
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Info<< " A1: " << gMin(A1) << " - " << gMax(A1) << endl;
|
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Info<< " A2: " << gMin(A2) << " - " << gMax(A2) << endl;
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Info<< " A2E: " << gMin(A2E) << " - "
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<< gMax(A2E) << endl;
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Info<< " dmdtW: " << gMin(dmdtf_) << " - "
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||||
<< gMax(dmdtf_) << endl;
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Info<< " qc: " << gMin(qc) << " - " << gMax(qc) << endl;
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Info<< " qq: " << gMin(fLiquid*qq()) << " - "
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<< gMax(fLiquid*qq()) << endl;
|
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Info<< " qe: " << gMin(fLiquid*qe()) << " - "
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<< gMax(fLiquid*qe()) << endl;
|
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Info<< " qEff: " << gMin(qEff) << " - "
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<< gMax(qEff) << endl;
|
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Info<< " alphat: " << gMin(*this) << " - "
|
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<< gMax(*this) << endl;
|
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Info<< " alphatConv: " << gMin(alphatConv_)
|
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<< " - " << gMax(alphatConv_) << endl;
|
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}
|
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// Nucleation site density:
|
||||
const scalarField N
|
||||
(
|
||||
nucleationSiteModel_->N
|
||||
(
|
||||
liquid,
|
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vapor,
|
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patchi,
|
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Tl,
|
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Tsatw,
|
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L,
|
||||
dDep_,
|
||||
fDep
|
||||
)
|
||||
);
|
||||
|
||||
if (maxErr < 1e-1)
|
||||
{
|
||||
if (i > 0)
|
||||
// Area fractions:
|
||||
|
||||
// Del Valle & Kenning (1985)
|
||||
const scalarField Ja
|
||||
(
|
||||
rhoLiquidw*Cpw*(Tsatw - Tl)/(rhoVaporw*L)
|
||||
);
|
||||
|
||||
const scalarField Al
|
||||
(
|
||||
fLiquid*4.8*exp( min(-Ja/80, log(vGreat)))
|
||||
);
|
||||
|
||||
scalarField A2(min(pi*sqr(dDep_)*N*Al/4, scalar(1)));
|
||||
const scalarField A1(max(1 - A2, scalar(1e-4)));
|
||||
scalarField A2E(min(pi*sqr(dDep_)*N*Al/4, scalar(5)));
|
||||
|
||||
if (volatileSpecie != "none" && !liquid.pure())
|
||||
{
|
||||
Info<< "Wall boiling wall function iterations: "
|
||||
<< i + 1 << endl;
|
||||
const volScalarField& Yvolatile =
|
||||
liquid.Y(volatileSpecie);
|
||||
A2E *= Yvolatile.boundaryField()[patchi];
|
||||
A2 *= Yvolatile.boundaryField()[patchi];
|
||||
}
|
||||
break;
|
||||
}
|
||||
else if (i == (maxIter - 1))
|
||||
{
|
||||
Info<< "Maximum number of wall boiling wall function "
|
||||
<< "iterations (" << maxIter << ") reached." << endl
|
||||
<< "Maximum change in wall temperature on last "
|
||||
<< "iteration: " << maxErr << endl;
|
||||
}
|
||||
|
||||
// Volumetric mass source in the near wall cell due to the
|
||||
// wall boiling
|
||||
dmdtf_ =
|
||||
(1 - relax_)*dmdtf_
|
||||
+ relax_*(1.0/6.0)*A2E*dDep_*rhoVaporw*fDep*AbyV_;
|
||||
|
||||
// Volumetric source in the near wall cell due to the wall
|
||||
// boiling
|
||||
dmdtLf_ = dmdtf_*L;
|
||||
|
||||
// Quenching heat transfer coefficient
|
||||
const scalarField hQ
|
||||
(
|
||||
2*(alphaw*Cpw)*fDep
|
||||
*sqrt
|
||||
(
|
||||
(0.8/max(fDep, small))/(pi*alphaw/rhoLiquidw)
|
||||
)
|
||||
);
|
||||
|
||||
// Quenching heat flux
|
||||
qq_ =
|
||||
(1 - relax_)*qq_
|
||||
+ relax_*(A2*hQ*max(Tw - Tl, scalar(0)));
|
||||
|
||||
// Effective thermal diffusivity that corresponds to the
|
||||
// calculated convective, quenching and evaporative heat
|
||||
// fluxes
|
||||
|
||||
operator==
|
||||
(
|
||||
(
|
||||
A1*alphatConv_
|
||||
+ (qq_ + qe())/max(hew.snGrad(), scalar(1e-16))
|
||||
)
|
||||
/max(liquidw, scalar(1e-8))
|
||||
);
|
||||
|
||||
scalarField TsupPrev(max((Tw - Tsatw), scalar(0)));
|
||||
const_cast<fvPatchScalarField&>(Tw).evaluate();
|
||||
scalarField TsupNew(max((Tw - Tsatw), scalar(0)));
|
||||
|
||||
scalar maxErr(max(mag(TsupPrev - TsupNew)));
|
||||
|
||||
if (debug)
|
||||
{
|
||||
const scalarField qc
|
||||
(
|
||||
fLiquid*A1*(alphatConv_ + alphaw)*hew.snGrad()
|
||||
);
|
||||
|
||||
const scalarField qEff
|
||||
(
|
||||
liquidw*(*this + alphaw)*hew.snGrad()
|
||||
);
|
||||
|
||||
Info<< " L: " << gMin(L) << " - " << gMax(L) << endl;
|
||||
Info<< " Tl: " << gMin(Tl) << " - " << gMax(Tl)
|
||||
<< endl;
|
||||
Info<< " N: " << gMin(N) << " - " << gMax(N) << endl;
|
||||
Info<< " dDep_: " << gMin(dDep_) << " - "
|
||||
<< gMax(dDep_) << endl;
|
||||
Info<< " fDep: " << gMin(fDep) << " - "
|
||||
<< gMax(fDep) << endl;
|
||||
Info<< " Al: " << gMin(Al) << " - " << gMax(Al)
|
||||
<< endl;
|
||||
Info<< " A1: " << gMin(A1) << " - " << gMax(A1)
|
||||
<< endl;
|
||||
Info<< " A2: " << gMin(A2) << " - " << gMax(A2)
|
||||
<< endl;
|
||||
Info<< " A2E: " << gMin(A2E) << " - "
|
||||
<< gMax(A2E) << endl;
|
||||
Info<< " dmdtW: " << gMin(dmdtf_) << " - "
|
||||
<< gMax(dmdtf_) << endl;
|
||||
Info<< " qc: " << gMin(qc) << " - " << gMax(qc)
|
||||
<< endl;
|
||||
Info<< " qq: " << gMin(fLiquid*qq()) << " - "
|
||||
<< gMax(fLiquid*qq()) << endl;
|
||||
Info<< " qe: " << gMin(fLiquid*qe()) << " - "
|
||||
<< gMax(fLiquid*qe()) << endl;
|
||||
Info<< " qEff: " << gMin(qEff) << " - "
|
||||
<< gMax(qEff) << endl;
|
||||
Info<< " alphat: " << gMin(*this) << " - "
|
||||
<< gMax(*this) << endl;
|
||||
Info<< " alphatConv: " << gMin(alphatConv_)
|
||||
<< " - " << gMax(alphatConv_) << endl;
|
||||
}
|
||||
|
||||
if (maxErr < 1e-1)
|
||||
{
|
||||
if (i > 0)
|
||||
{
|
||||
Info<< "Wall boiling wall function iterations: "
|
||||
<< i + 1 << endl;
|
||||
}
|
||||
break;
|
||||
}
|
||||
else if (i == (maxIter - 1))
|
||||
{
|
||||
Info<< "Maximum number of wall boiling wall function "
|
||||
<< "iterations (" << maxIter << ") reached." << endl
|
||||
<< "Maximum change in wall temperature on last "
|
||||
<< "iteration: " << maxErr << endl;
|
||||
}
|
||||
|
||||
}
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
Info<< "Saturation model for phase pair "
|
||||
<< phasePair(vapor,liquid).name()
|
||||
<< " not found. Wall boiling disabled." << endl;
|
||||
|
||||
operator== (alphatConv_);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user