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synced 2025-11-28 03:28:01 +00:00
ENH: Updated forces and forceCoeffs so that p and U fields need not exist on construction
This commit is contained in:
andy
@ -156,80 +156,82 @@ void Foam::forceCoeffs::timeSet()
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void Foam::forceCoeffs::write()
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{
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if (active_)
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forces::calcForcesMoment();
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if (!active_)
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{
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forces::calcForcesMoment();
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return;
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}
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if (Pstream::master())
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if (Pstream::master())
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{
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functionObjectFile::write();
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scalar pDyn = 0.5*rhoRef_*magUInf_*magUInf_;
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Field<vector> totForce(force_[0] + force_[1] + force_[2]);
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Field<vector> totMoment(moment_[0] + moment_[1] + moment_[2]);
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List<Field<scalar> > coeffs(3);
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coeffs[0].setSize(nBin_);
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coeffs[1].setSize(nBin_);
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coeffs[2].setSize(nBin_);
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// lift, drag and moment
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coeffs[0] = (totForce & liftDir_)/(Aref_*pDyn);
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coeffs[1] = (totForce & dragDir_)/(Aref_*pDyn);
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coeffs[2] = (totMoment & pitchAxis_)/(Aref_*lRef_*pDyn);
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scalar Cl = sum(coeffs[0]);
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scalar Cd = sum(coeffs[1]);
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scalar Cm = sum(coeffs[2]);
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scalar Clf = Cl/2.0 + Cm;
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scalar Clr = Cl/2.0 - Cm;
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file(0)
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<< obr_.time().value() << tab
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<< Cm << tab << Cd << tab << Cl << tab << Clf << tab << Clr
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<< endl;
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if (log_)
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{
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functionObjectFile::write();
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Info<< type() << " output:" << nl
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<< " Cm = " << Cm << nl
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<< " Cd = " << Cd << nl
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<< " Cl = " << Cl << nl
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<< " Cl(f) = " << Clf << nl
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<< " Cl(r) = " << Clr << endl;
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}
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scalar pDyn = 0.5*rhoRef_*magUInf_*magUInf_;
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Field<vector> totForce(force_[0] + force_[1] + force_[2]);
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Field<vector> totMoment(moment_[0] + moment_[1] + moment_[2]);
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List<Field<scalar> > coeffs(3);
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coeffs[0].setSize(nBin_);
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coeffs[1].setSize(nBin_);
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coeffs[2].setSize(nBin_);
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// lift, drag and moment
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coeffs[0] = (totForce & liftDir_)/(Aref_*pDyn);
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coeffs[1] = (totForce & dragDir_)/(Aref_*pDyn);
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coeffs[2] = (totMoment & pitchAxis_)/(Aref_*lRef_*pDyn);
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scalar Cl = sum(coeffs[0]);
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scalar Cd = sum(coeffs[1]);
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scalar Cm = sum(coeffs[2]);
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scalar Clf = Cl/2.0 + Cm;
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scalar Clr = Cl/2.0 - Cm;
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file(0)
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<< obr_.time().value() << tab
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<< Cm << tab << Cd << tab << Cl << tab << Clf << tab << Clr
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<< endl;
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if (log_)
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if (nBin_ > 1)
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{
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if (binCumulative_)
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{
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Info<< type() << " output:" << nl
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<< " Cm = " << Cm << nl
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<< " Cd = " << Cd << nl
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<< " Cl = " << Cl << nl
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<< " Cl(f) = " << Clf << nl
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<< " Cl(r) = " << Clr << endl;
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}
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if (nBin_ > 1)
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{
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if (binCumulative_)
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for (label i = 1; i < coeffs[0].size(); i++)
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{
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for (label i = 1; i < coeffs[0].size(); i++)
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{
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coeffs[0][i] += coeffs[0][i-1];
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coeffs[1][i] += coeffs[1][i-1];
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coeffs[2][i] += coeffs[2][i-1];
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}
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coeffs[0][i] += coeffs[0][i-1];
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coeffs[1][i] += coeffs[1][i-1];
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coeffs[2][i] += coeffs[2][i-1];
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}
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file(1)<< obr_.time().value();
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forAll(coeffs[0], i)
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{
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file(1)
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<< tab << coeffs[2][i]
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<< tab << coeffs[1][i]
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<< tab << coeffs[0][i];
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}
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file(1) << endl;
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}
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if (log_)
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file(1)<< obr_.time().value();
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forAll(coeffs[0], i)
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{
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Info<< endl;
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file(1)
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<< tab << coeffs[2][i]
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<< tab << coeffs[1][i]
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<< tab << coeffs[0][i];
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}
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file(1) << endl;
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}
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if (log_)
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{
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Info<< endl;
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}
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}
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}
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@ -130,6 +130,55 @@ void Foam::forces::writeFileHeader(const label i)
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}
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void Foam::forces::initialise()
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{
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if (initialised_ || !active_)
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{
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return;
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}
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if (directForceDensity_)
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{
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if (!obr_.foundObject<volVectorField>(fDName_))
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{
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active_ = false;
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WarningIn("void Foam::forces::initialise()")
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<< "Could not find " << fDName_ << " in database." << nl
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<< " De-activating forces."
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<< endl;
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}
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}
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else
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{
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if
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(
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!obr_.foundObject<volVectorField>(UName_)
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|| !obr_.foundObject<volScalarField>(pName_)
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|| (
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rhoName_ != "rhoInf"
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&& !obr_.foundObject<volScalarField>(rhoName_)
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)
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)
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{
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active_ = false;
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WarningIn("void Foam::forces::initialise()")
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<< "Could not find " << UName_ << ", " << pName_;
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if (rhoName_ != "rhoInf")
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{
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Info<< " or " << rhoName_;
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}
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Info<< " in database." << nl
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<< " De-activating forces." << endl;
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}
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}
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initialised_ = true;
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}
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Foam::tmp<Foam::volSymmTensorField> Foam::forces::devRhoReff() const
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{
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typedef compressible::turbulenceModel cmpTurbModel;
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@ -474,7 +523,8 @@ Foam::forces::forces
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binMin_(GREAT),
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binPoints_(),
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binFormat_("undefined"),
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binCumulative_(true)
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binCumulative_(true),
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initialised_(false)
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{
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// Check if the available mesh is an fvMesh otherise deactivate
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if (!isA<fvMesh>(obr_))
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@ -534,7 +584,8 @@ Foam::forces::forces
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binMin_(GREAT),
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binPoints_(),
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binFormat_("undefined"),
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binCumulative_(true)
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binCumulative_(true),
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initialised_(false)
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{
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forAll(force_, i)
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{
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@ -556,6 +607,8 @@ void Foam::forces::read(const dictionary& dict)
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{
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if (active_)
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{
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initialised_ = false;
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log_ = dict.lookupOrDefault<Switch>("log", false);
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directForceDensity_ = dict.lookupOrDefault("directForceDensity", false);
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@ -568,19 +621,6 @@ void Foam::forces::read(const dictionary& dict)
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{
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// Optional entry for fDName
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fDName_ = dict.lookupOrDefault<word>("fDName", "fD");
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// Check whether fDName exists, if not deactivate forces
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if
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(
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!obr_.foundObject<volVectorField>(fDName_)
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)
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{
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active_ = false;
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WarningIn("void forces::read(const dictionary&)")
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<< "Could not find " << fDName_ << " in database." << nl
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<< " De-activating forces."
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<< endl;
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}
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}
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else
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{
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@ -589,32 +629,6 @@ void Foam::forces::read(const dictionary& dict)
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UName_ = dict.lookupOrDefault<word>("UName", "U");
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rhoName_ = dict.lookupOrDefault<word>("rhoName", "rho");
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// Check whether UName, pName and rhoName exists,
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// if not deactivate forces
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if
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(
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!obr_.foundObject<volVectorField>(UName_)
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|| !obr_.foundObject<volScalarField>(pName_)
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|| (
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rhoName_ != "rhoInf"
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&& !obr_.foundObject<volScalarField>(rhoName_)
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)
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)
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{
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active_ = false;
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WarningIn("void forces::read(const dictionary&)")
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<< "Could not find " << UName_ << ", " << pName_;
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if (rhoName_ != "rhoInf")
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{
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Info<< " or " << rhoName_;
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}
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Info<< " in database." << nl
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<< " De-activating forces." << endl;
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}
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// Reference density needed for incompressible calculations
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rhoRef_ = readScalar(dict.lookup("rhoInf"));
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@ -745,13 +759,13 @@ void Foam::forces::timeSet()
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void Foam::forces::write()
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{
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calcForcesMoment();
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if (!active_)
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{
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return;
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}
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calcForcesMoment();
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if (Pstream::master())
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{
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functionObjectFile::write();
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@ -770,6 +784,13 @@ void Foam::forces::write()
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void Foam::forces::calcForcesMoment()
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{
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initialise();
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if (!active_)
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{
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return;
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}
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force_[0] = vector::zero;
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force_[1] = vector::zero;
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force_[2] = vector::zero;
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@ -32,7 +32,8 @@ Description
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pressure and skin-friction forces over a given list of patches.
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Member function forces::write() calculates the forces/moments and
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writes the forces/moments into the file \<timeDir\>/forces.dat
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writes the forces/moments into the file \<timeDir\>/forces.dat and bin
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data (if selected) to the file \<timeDir\>/forces_bin.dat
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Example of function object specification:
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\verbatim
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@ -45,7 +46,6 @@ Description
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patches (walls);
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nBin 20;
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binDir (1 0 0);
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binFormat gnuplot;
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}
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\endverbatim
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@ -57,7 +57,6 @@ Description
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patches | patches included in the forces calculation | yes |
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nBin | number of data bins | no |
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binDir | direction along which bins are defined | no |
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binFormat | output format for bin data | no |
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pName | pressure field name | no | p
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UName | velocity field name | no | U
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rhoName | density field name (see below) | no | rho
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@ -216,6 +215,10 @@ protected:
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bool binCumulative_;
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//- Initialised flag
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bool initialised_;
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// Protected Member Functions
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//- Create file names for forces and bins
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@ -224,6 +227,9 @@ protected:
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//- Output file header information
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virtual void writeFileHeader(const label i);
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//- Initialise the fields
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void initialise();
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//- Return the effective viscous stress (laminar + turbulent).
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tmp<volSymmTensorField> devRhoReff() const;
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