tidying epsilon wf - using rasModel to provide fields instead of db lookup, and cache yPlusLam_

src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/epsilonWallFunctions/epsilonWallFunction/epsilonWallFunctionFvPatchScalarField.C

@@ -56,6 +56,32 @@ void epsilonWallFunctionFvPatchScalarField::checkType()
 }
 
 
+scalar epsilonWallFunctionFvPatchScalarField::calcYPlusLam
+(
+    const scalar kappa,
+    const scalar E
+) const
+{
+    scalar ypl = 11.0;
+
+    for (int i=0; i<10; i++)
+    {
+        ypl = log(E*ypl)/kappa;
+    }
+
+    return ypl;
+}
+
+
+void epsilonWallFunctionFvPatchScalarField::writeLocalEntries(Ostream& os) const
+{
+    writeEntryIfDifferent<word>(os, "G", "RASModel::G", GName_);
+    os.writeKeyword("Cmu") << Cmu_ << token::END_STATEMENT << nl;
+    os.writeKeyword("kappa") << kappa_ << token::END_STATEMENT << nl;
+    os.writeKeyword("E") << E_ << token::END_STATEMENT << nl;
+}
+
+
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
@@ -65,14 +91,11 @@ epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
 )
 :
     fixedInternalValueFvPatchField<scalar>(p, iF),
-    UName_("U"),
-    kName_("k"),
     GName_("RASModel::G"),
-    nuName_("nu"),
-    nutName_("nut"),
     Cmu_(0.09),
     kappa_(0.41),
-    E_(9.8)
+    E_(9.8),
+    yPlusLam_(calcYPlusLam(kappa_, E_))
 {
     checkType();
 }
@@ -87,14 +110,11 @@ epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
 )
 :
     fixedInternalValueFvPatchField<scalar>(ptf, p, iF, mapper),
-    UName_(ptf.UName_),
-    kName_(ptf.kName_),
     GName_(ptf.GName_),
-    nuName_(ptf.nuName_),
-    nutName_(ptf.nutName_),
     Cmu_(ptf.Cmu_),
     kappa_(ptf.kappa_),
-    E_(ptf.E_)
+    E_(ptf.E_),
+    yPlusLam_(ptf.yPlusLam_)
 {
     checkType();
 }
@@ -108,14 +128,11 @@ epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
 )
 :
     fixedInternalValueFvPatchField<scalar>(p, iF, dict),
-    UName_(dict.lookupOrDefault<word>("U", "U")),
-    kName_(dict.lookupOrDefault<word>("k", "k")),
     GName_(dict.lookupOrDefault<word>("G", "RASModel::G")),
-    nuName_(dict.lookupOrDefault<word>("nu", "nu")),
-    nutName_(dict.lookupOrDefault<word>("nut", "nut")),
     Cmu_(dict.lookupOrDefault<scalar>("Cmu", 0.09)),
     kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
-    E_(dict.lookupOrDefault<scalar>("E", 9.8))
+    E_(dict.lookupOrDefault<scalar>("E", 9.8)),
+    yPlusLam_(calcYPlusLam(kappa_, E_))
 {
     checkType();
 }
@@ -127,14 +144,11 @@ epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
 )
 :
     fixedInternalValueFvPatchField<scalar>(ewfpsf),
-    UName_(ewfpsf.UName_),
-    kName_(ewfpsf.kName_),
     GName_(ewfpsf.GName_),
-    nuName_(ewfpsf.nuName_),
-    nutName_(ewfpsf.nutName_),
     Cmu_(ewfpsf.Cmu_),
     kappa_(ewfpsf.kappa_),
-    E_(ewfpsf.E_)
+    E_(ewfpsf.E_),
+    yPlusLam_(ewfpsf.yPlusLam_)
 {
     checkType();
 }
@@ -147,14 +161,11 @@ epsilonWallFunctionFvPatchScalarField::epsilonWallFunctionFvPatchScalarField
 )
 :
     fixedInternalValueFvPatchField<scalar>(ewfpsf, iF),
-    UName_(ewfpsf.UName_),
-    kName_(ewfpsf.kName_),
     GName_(ewfpsf.GName_),
-    nuName_(ewfpsf.nuName_),
-    nutName_(ewfpsf.nutName_),
     Cmu_(ewfpsf.Cmu_),
     kappa_(ewfpsf.kappa_),
-    E_(ewfpsf.E_)
+    E_(ewfpsf.E_),
+    yPlusLam_(ewfpsf.yPlusLam_)
 {
     checkType();
 }
@@ -169,29 +180,33 @@ void epsilonWallFunctionFvPatchScalarField::updateCoeffs()
         return;
     }
 
+    const label patchI = patch().index();
+
     const RASModel& rasModel = db().lookupObject<RASModel>("RASProperties");
-    const scalar yPlusLam = rasModel.yPlusLam(kappa_, E_);
-    const scalarField& y = rasModel.y()[patch().index()];
+    const scalarField& y = rasModel.y()[patchI];
 
     const scalar Cmu25 = pow(Cmu_, 0.25);
     const scalar Cmu75 = pow(Cmu_, 0.75);
 
-    volScalarField& G = const_cast<volScalarField&>
-        (db().lookupObject<volScalarField>(GName_));
+    volScalarField& G =
+        const_cast<volScalarField&>(db().lookupObject<volScalarField>(GName_));
 
-    volScalarField& epsilon = const_cast<volScalarField&>
-        (db().lookupObject<volScalarField>(dimensionedInternalField().name()));
+    DimensionedField<scalar, volMesh>& epsilon =
+        const_cast<DimensionedField<scalar, volMesh>&>
+        (
+            dimensionedInternalField()
+        );
 
-    const volScalarField& k = db().lookupObject<volScalarField>(kName_);
+    const tmp<volScalarField> tk = rasModel.k();
+    const volScalarField& k = tk();
 
-    const scalarField& nuw =
-        patch().lookupPatchField<volScalarField, scalar>(nuName_);
+    const scalarField& nuw = rasModel.nu().boundaryField()[patchI];
 
-    const scalarField& nutw =
-        patch().lookupPatchField<volScalarField, scalar>(nutName_);
+    const tmp<volScalarField> tnut = rasModel.nut();
+    const volScalarField& nut = tnut();
+    const scalarField& nutw = nut.boundaryField()[patchI];
 
-    const fvPatchVectorField& Uw =
-        patch().lookupPatchField<volVectorField, vector>(UName_);
+    const fvPatchVectorField& Uw = rasModel.U().boundaryField()[patchI];
 
     const scalarField magGradUw = mag(Uw.snGrad());
 
@@ -204,7 +219,7 @@ void epsilonWallFunctionFvPatchScalarField::updateCoeffs()
 
         epsilon[faceCellI] = Cmu75*pow(k[faceCellI], 1.5)/(kappa_*y[faceI]);
 
-        if (yPlus > yPlusLam)
+        if (yPlus > yPlusLam_)
         {
             G[faceCellI] =
                 (nutw[faceI] + nuw[faceI])
@@ -236,14 +251,7 @@ void epsilonWallFunctionFvPatchScalarField::evaluate
 void epsilonWallFunctionFvPatchScalarField::write(Ostream& os) const
 {
     fixedInternalValueFvPatchField<scalar>::write(os);
-    writeEntryIfDifferent<word>(os, "U", "U", UName_);
-    writeEntryIfDifferent<word>(os, "k", "k", kName_);
-    writeEntryIfDifferent<word>(os, "G", "RASModel::G", GName_);
-    writeEntryIfDifferent<word>(os, "nu", "nu", nuName_);
-    writeEntryIfDifferent<word>(os, "nut", "nut", nutName_);
-    os.writeKeyword("Cmu") << Cmu_ << token::END_STATEMENT << nl;
-    os.writeKeyword("kappa") << kappa_ << token::END_STATEMENT << nl;
-    os.writeKeyword("E") << E_ << token::END_STATEMENT << nl;
+    writeLocalEntries(os);
     writeEntry("value", os);
 }
 

src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/epsilonWallFunctions/epsilonWallFunction/epsilonWallFunctionFvPatchScalarField.H

@@ -57,23 +57,13 @@ class epsilonWallFunctionFvPatchScalarField
 :
     public fixedInternalValueFvPatchField<scalar>
 {
-    // Private data
+protected:
 
-        //- Name of velocity field
-        word UName_;
-
-        //- Name of turbulence kinetic energy field
-        word kName_;
+    // Protected data
 
         //- Name of turbulence generation field
         word GName_;
 
-        //- Name of laminar viscosity field
-        word nuName_;
-
-        //- Name of turbulent viscosity field
-        word nutName_;
-
         //- Cmu coefficient
         scalar Cmu_;
 
@@ -84,10 +74,20 @@ class epsilonWallFunctionFvPatchScalarField
         scalar E_;
 
 
-    // Private member functions
+        //- Y+ at the edge of the laminar sublayer
+        scalar yPlusLam_;
+
+
+    // Protected member functions
 
         //- Check the type of the patch
-        void checkType();
+        virtual void checkType();
+
+        //- Calculate the Y+ at the edge of the laminar sublayer
+        virtual scalar calcYPlusLam(const scalar kappa, const scalar E) const;
+
+        //- Write local wall function variables
+        virtual void writeLocalEntries(Ostream&) const;
 
 
 public:
@@ -173,7 +173,7 @@ public:
         // I-O
 
             //- Write
-            void write(Ostream&) const;
+            virtual void write(Ostream&) const;
 };