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ENH: actuation disk modifications and rough Wall function for atm inlet

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This commit is contained in:
sergio
2012-02-02 15:17:50 +00:00
parent 0463b16608
commit 5eca8bd935
11 changed files with 101 additions and 62 deletions
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12
src/fieldSources/basicSource/actuationDiskSource/actuationDiskSource.C
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@ -66,6 +66,12 @@ void Foam::actuationDiskSource::checkData() const
<< "disk direction vector is approximately zero"
<< exit(FatalIOError);
}
if (returnReduce(upstreamCellId_, maxOp<label>()) == -1)
{
FatalErrorIn("Foam::actuationDiskSource::checkData()")
<< "upstream location " << upstreamPoint_ << " not found in mesh"
<< exit(FatalIOError);
}
}
@ -83,7 +89,9 @@ Foam::actuationDiskSource::actuationDiskSource
diskDir_(coeffs_.lookup("diskDir")),
Cp_(readScalar(coeffs_.lookup("Cp"))),
Ct_(readScalar(coeffs_.lookup("Ct"))),
diskArea_(readScalar(coeffs_.lookup("diskArea")))
diskArea_(readScalar(coeffs_.lookup("diskArea"))),
upstreamPoint_(coeffs_.lookup("upstreamPoint")),
upstreamCellId_(-1)
{
coeffs_.lookup("fieldNames") >> fieldNames_;
applied_.setSize(fieldNames_.size(), false);
@ -91,6 +99,8 @@ Foam::actuationDiskSource::actuationDiskSource
Info<< " - creating actuation disk zone: "
<< this->name() << endl;
upstreamCellId_ = mesh.findCell(upstreamPoint_);
checkData();
}

7
src/fieldSources/basicSource/actuationDiskSource/actuationDiskSource.H
View File

@ -48,6 +48,7 @@ Description
Cp 0.1; // power coefficient
Ct 0.5; // thrust coefficient
diskArea 5.0; // disk area
upstreamPoint (0 0 0); // upstream point
}
@ -92,6 +93,12 @@ protected:
//- Disk area
scalar diskArea_;
//- Upstream point sample
point upstreamPoint_;
//- Upstream cell ID
label upstreamCellId_;
private:

15
src/fieldSources/basicSource/actuationDiskSource/actuationDiskSourceTemplates.C
View File

@ -42,20 +42,27 @@ void Foam::actuationDiskSource::addActuationDiskAxialInertialResistance
) const
{
scalar a = 1.0 - Cp_/Ct_;
scalarField T(cells.size());
vector uniDiskDir = diskDir_/mag(diskDir_);
tensor E(tensor::zero);
E.xx() = uniDiskDir.x();
E.yy() = uniDiskDir.y();
E.zz() = uniDiskDir.z();
forAll(cells, i)
vector upU = vector(VGREAT, VGREAT, VGREAT);
scalar upRho = VGREAT;
if (upstreamCellId_ != -1)
{
T[i] = 2.0*rho[cells[i]]*diskArea_*mag(U[cells[i]])*a/(1.0 - a);
upU = U[upstreamCellId_];
upRho = rho[upstreamCellId_];
}
reduce(upU, minOp<vector>());
reduce(upRho, minOp<scalar>());
scalar T = 2.0*upRho*diskArea_*mag(upU)*a*(1 - a);
forAll(cells, i)
{
Usource[cells[i]] -= ((Vcells[cells[i]]/V())*T[i]*E) & U[cells[i]];
Usource[cells[i]] += ((Vcells[cells[i]]/V())*T*E) & upU;
}
}

1
src/fieldSources/basicSource/radialActuationDiskSource/radialActuationDiskSource.H
View File

@ -53,6 +53,7 @@ Description
Ct 0.5; // thrust coefficient
diskArea 5.0; // disk area
coeffs (0.1 0.5 0.01); // radial distribution coefficients
upstreamPoint (0 0 0); // upstream point
}

22
src/fieldSources/basicSource/radialActuationDiskSource/radialActuationDiskSourceTemplates.C
View File

@ -44,11 +44,9 @@ addRadialActuationDiskAxialInertialResistance
) const
{
scalar a = 1.0 - Cp_/Ct_;
scalarField T(cells.size());
scalarField Tr(cells.size());
const vector uniDiskDir = diskDir_/mag(diskDir_);
tensor E(tensor::zero);
E.xx() = uniDiskDir.x();
E.yy() = uniDiskDir.y();
@ -65,21 +63,27 @@ addRadialActuationDiskAxialInertialResistance
+ radialCoeffs_[1]*sqr(maxR)/2.0
+ radialCoeffs_[2]*pow4(maxR)/3.0;
vector upU = vector(VGREAT, VGREAT, VGREAT);
scalar upRho = VGREAT;
if (upstreamCellId_ != -1)
{
upU = U[upstreamCellId_];
upRho = rho[upstreamCellId_];
}
reduce(upU, minOp<vector>());
reduce(upRho, minOp<scalar>());
scalar T = 2.0*upRho*diskArea_*mag(upU)*a*(1.0 - a);
forAll(cells, i)
{
T[i] = 2.0*rho[cells[i]]*diskArea_*mag(U[cells[i]])*a/(1.0 - a);
scalar r2 = magSqr(mesh().cellCentres()[cells[i]] - avgCentre);
Tr[i] =
T[i]
T
*(radialCoeffs_[0] + radialCoeffs_[1]*r2 + radialCoeffs_[2]*sqr(r2))
/intCoeffs;
}
forAll(cells, i)
{
Usource[cells[i]] -= ((Vcells[cells[i]]/V_)*Tr[i]*E) & U[cells[i]];
Usource[cells[i]] += ((Vcells[cells[i]]/V_)*Tr[i]*E) & upU;
}
if (debug)

21
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletEpsilon/atmBoundaryLayerInletEpsilonFvPatchScalarField.C
View File

@ -51,6 +51,8 @@ atmBoundaryLayerInletEpsilonFvPatchScalarField
z_(pTraits<vector>::zero),
z0_(0),
kappa_(0.41),
Uref_(0),
Href_(0),
zGround_(0)
{}
@ -69,6 +71,8 @@ atmBoundaryLayerInletEpsilonFvPatchScalarField
z_(ptf.z_),
z0_(ptf.z0_),
kappa_(ptf.kappa_),
Uref_(ptf.Uref_),
Href_(ptf.Href_),
zGround_(ptf.zGround_)
{}
@ -82,10 +86,12 @@ atmBoundaryLayerInletEpsilonFvPatchScalarField
)
:
fixedValueFvPatchScalarField(p, iF),
Ustar_(readScalar(dict.lookup("Ustar"))),
Ustar_(p.size()),
z_(dict.lookup("z")),
z0_(readScalar(dict.lookup("z0"))),
kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
Uref_(readScalar(dict.lookup("Uref"))),
Href_(readScalar(dict.lookup("Href"))),
zGround_("zGround", dict, p.size())
{
if (mag(z_) < SMALL)
@ -103,6 +109,11 @@ atmBoundaryLayerInletEpsilonFvPatchScalarField
<< abort(FatalError);
}
forAll (Ustar_, i)
{
Ustar_[i] = kappa_*Uref_/(log((Href_ + z0_[i])/max(z0_[i] , 0.001)));
}
z_ /= mag(z_);
evaluate();
@ -121,6 +132,8 @@ atmBoundaryLayerInletEpsilonFvPatchScalarField
z_(blpsf.z_),
z0_(blpsf.z0_),
kappa_(blpsf.kappa_),
Uref_(blpsf.Uref_),
Href_(blpsf.Href_),
zGround_(blpsf.zGround_)
{}
@ -138,14 +151,16 @@ void atmBoundaryLayerInletEpsilonFvPatchScalarField::updateCoeffs()
void atmBoundaryLayerInletEpsilonFvPatchScalarField::write(Ostream& os) const
{
fvPatchScalarField::write(os);
os.writeKeyword("Ustar")
<< Ustar_ << token::END_STATEMENT << nl;
os.writeKeyword("z")
<< z_ << token::END_STATEMENT << nl;
os.writeKeyword("z0")
<< z0_ << token::END_STATEMENT << nl;
os.writeKeyword("kappa")
<< kappa_ << token::END_STATEMENT << nl;
os.writeKeyword("Uref")
<< Uref_ << token::END_STATEMENT << nl;
os.writeKeyword("Href")
<< Href_ << token::END_STATEMENT << nl;
os.writeKeyword("zGround")
<< zGround_ << token::END_STATEMENT << nl;
writeEntry("value", os);

22
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletEpsilon/atmBoundaryLayerInletEpsilonFvPatchScalarField.H
View File

@ -41,6 +41,16 @@ Description
z0 is the surface roughness lenght
zGround minium vlaue in z direction
and:
Ustar = K Uref/ln((Zref + z0)/z0)
where:
Uref is the reference velocity at Zref
Zref is the reference height.
\endverbatim
Reference:
@ -78,17 +88,23 @@ class atmBoundaryLayerInletEpsilonFvPatchScalarField
// Private data
//- Frictional velocity
const scalar Ustar_;
scalarField Ustar_;
//- Direction of the z-coordinate
vector z_;
//- Surface roughness lenght
const scalar z0_;
scalarField z0_;
//- Von Karman constant
const scalar kappa_;
//- Reference velocity
const scalar Uref_;
//- Reference hight
const scalar Href_;
//- Minimum corrdinate value in z direction
const scalarField zGround_;
@ -158,7 +174,7 @@ public:
// Member functions
//- Return max value
scalar Ustar() const
scalarField Ustar() const
{
return Ustar_;
}

22
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.C
View File

@ -88,16 +88,16 @@ atmBoundaryLayerInletVelocityFvPatchVectorField
)
:
fixedValueFvPatchVectorField(p, iF),
Ustar_(0),
Ustar_(p.size()),
n_(dict.lookup("n")),
z_(dict.lookup("z")),
z0_(readScalar(dict.lookup("z0"))),
z0_("z0", dict, p.size()),
kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
Uref_(readScalar(dict.lookup("Uref"))),
Href_(readScalar(dict.lookup("Href"))),
zGround_("zGround", dict, p.size())
{
if (mag(n_) < SMALL || mag(z_) < SMALL || mag(z0_) < SMALL)
if (mag(n_) < SMALL || mag(z_) < SMALL)
{
FatalErrorIn
(
@ -108,14 +108,17 @@ atmBoundaryLayerInletVelocityFvPatchVectorField
"onst dictionary&"
")"
)
<< "magnitude of n, z and z0 vectors must be greater than zero"
<< "magnitude of n or z must be greater than zero"
<< abort(FatalError);
}
n_ /= mag(n_);
z_ /= mag(z_);
Ustar_ = kappa_*Uref_/(log((Href_ + z0_)/max(z0_ , 0.001)));
forAll (Ustar_, i)
{
Ustar_[i] = kappa_*Uref_/(log((Href_ + z0_[i])/max(z0_[i] , 0.001)));
}
evaluate();
}
@ -153,12 +156,12 @@ void atmBoundaryLayerInletVelocityFvPatchVectorField::updateCoeffs()
if ((coord[i] - zGround_[i]) < Href_)
{
Un[i] =
(Ustar_/kappa_)
* log((coord[i] - zGround_[i] + z0_)/max(z0_, 0.001));
(Ustar_[i]/kappa_)
* log((coord[i] - zGround_[i] + z0_[i])/max(z0_[i], 0.001));
}
else
{
Un[i] = (Uref_);
Un[i] = Uref_;
}
}
@ -171,8 +174,7 @@ void atmBoundaryLayerInletVelocityFvPatchVectorField::updateCoeffs()
void atmBoundaryLayerInletVelocityFvPatchVectorField::write(Ostream& os) const
{
fvPatchVectorField::write(os);
os.writeKeyword("z0")
<< z0_ << token::END_STATEMENT << nl;
zGround_.writeEntry("z0", os) ;
os.writeKeyword("n")
<< n_ << token::END_STATEMENT << nl;
os.writeKeyword("z")

4
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/atmBoundaryLayerInletVelocity/atmBoundaryLayerInletVelocityFvPatchVectorField.H
View File

@ -92,7 +92,7 @@ class atmBoundaryLayerInletVelocityFvPatchVectorField
// Private data
//- Frictional velocity
scalar Ustar_;
scalarField Ustar_;
//- Flow direction
vector n_;
@ -101,7 +101,7 @@ class atmBoundaryLayerInletVelocityFvPatchVectorField
vector z_;
//- Surface roughness lenght
const scalar z0_;
scalarField z0_;
//- Von Karman constant
const scalar kappa_;

34
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutkAtmRoughWallFunction/nutkAtmRoughWallFunctionFvPatchScalarField.C
View File

@ -65,22 +65,10 @@ tmp<scalarField> nutkAtmRoughWallFunctionFvPatchScalarField::calcNut() const
scalar uStar = Cmu25*sqrt(k[faceCellI]);
scalar yPlus = uStar*y[faceI]/nuw[faceI];
scalar Edash = (y[faceI] + z0_[faceI] - zGround_[faceI])/z0_[faceI];
scalar Edash = (y[faceI] + z0_[faceI])/z0_[faceI];
scalar limitingNutw = max(nutw[faceI], nuw[faceI]);
// To avoid oscillations limit the change in the wall viscosity
// which is particularly important if it temporarily becomes zero
nutw[faceI] =
max
(
min
(
nuw[faceI]
*(yPlus*kappa_/log(max(Edash, 1+1e-4)) - 1),
2*limitingNutw
), 0.5*limitingNutw
);
nuw[faceI]*(yPlus*kappa_/log(max(Edash, 1+1e-4)) - 1);
if (debug)
{
@ -105,8 +93,7 @@ nutkAtmRoughWallFunctionFvPatchScalarField
)
:
nutkWallFunctionFvPatchScalarField(p, iF),
z0_(p.size(), 0.0),
zGround_(p.size(), 0.0)
z0_(p.size(), 0.0)
{}
@ -120,8 +107,7 @@ nutkAtmRoughWallFunctionFvPatchScalarField
)
:
nutkWallFunctionFvPatchScalarField(ptf, p, iF, mapper),
z0_(ptf.z0_, mapper),
zGround_(ptf.zGround_, mapper)
z0_(ptf.z0_, mapper)
{}
@ -134,8 +120,7 @@ nutkAtmRoughWallFunctionFvPatchScalarField
)
:
nutkWallFunctionFvPatchScalarField(p, iF, dict),
z0_("z0", dict, p.size()),
zGround_("zGround", dict, p.size())
z0_("z0", dict, p.size())
{}
@ -146,8 +131,7 @@ nutkAtmRoughWallFunctionFvPatchScalarField
)
:
nutkWallFunctionFvPatchScalarField(rwfpsf),
z0_(rwfpsf.z0_),
zGround_(rwfpsf.zGround_)
z0_(rwfpsf.z0_)
{}
@ -159,8 +143,7 @@ nutkAtmRoughWallFunctionFvPatchScalarField
)
:
nutkWallFunctionFvPatchScalarField(rwfpsf, iF),
z0_(rwfpsf.z0_),
zGround_(rwfpsf.zGround_)
z0_(rwfpsf.z0_)
{}
@ -173,7 +156,6 @@ void nutkAtmRoughWallFunctionFvPatchScalarField::autoMap
{
nutkWallFunctionFvPatchScalarField::autoMap(m);
z0_.autoMap(m);
zGround_.autoMap(m);
}
@ -189,7 +171,6 @@ void nutkAtmRoughWallFunctionFvPatchScalarField::rmap
refCast<const nutkAtmRoughWallFunctionFvPatchScalarField>(ptf);
z0_.rmap(nrwfpsf.z0_, addr);
zGround_.rmap(nrwfpsf.zGround_, addr);
}
@ -198,7 +179,6 @@ void nutkAtmRoughWallFunctionFvPatchScalarField::write(Ostream& os) const
fvPatchField<scalar>::write(os);
writeLocalEntries(os);
z0_.writeEntry("z0", os);
zGround_.writeEntry("zGround", os);
writeEntry("value", os);
}

3
src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutkAtmRoughWallFunction/nutkAtmRoughWallFunctionFvPatchScalarField.H
View File

@ -74,9 +74,6 @@ protected:
//- Surface roughness lenght
scalarField z0_;
//- Minimum corrdinate value in z direction
scalarField zGround_;
// Protected Member Functions