.. _program_listing_file_lawsOfTheWall_WernerWengleLawOfTheWall_WernerWengleLawOfTheWall.C:

Program Listing for File WernerWengleLawOfTheWall.C
===================================================

|exhale_lsh| :ref:`Return to documentation for file <file_lawsOfTheWall_WernerWengleLawOfTheWall_WernerWengleLawOfTheWall.C>` (``lawsOfTheWall/WernerWengleLawOfTheWall/WernerWengleLawOfTheWall.C``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*---------------------------------------------------------------------------* \
   License
       This file is part of libWallModelledLES.
   
       libWallModelledLES is free software: you can redistribute it and/or modify
       it under the terms of the GNU General Public License as published by
       the Free Software Foundation, either version 3 of the License, or
       (at your option) any later version.
   
       libWallModelledLES is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
       or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       for more details.
   
       You should have received a copy of the GNU General Public License
       along with libWallModelledLES. 
       If not, see <http://www.gnu.org/licenses/>.
   
   \*---------------------------------------------------------------------------*/
   
   #include "WernerWengleLawOfTheWall.H"
   #include "addToRunTimeSelectionTable.H"
   #include "scalarListIOList.H"
   #include "SingleCellSampler.H"
   
   #if !defined(DOXYGEN_SHOULD_SKIP_THIS)
   namespace Foam
   {
       defineTypeNameAndDebug(WernerWengleLawOfTheWall, 0);
       addToRunTimeSelectionTable(LawOfTheWall, WernerWengleLawOfTheWall, Dictionary);
       addToRunTimeSelectionTable(LawOfTheWall, WernerWengleLawOfTheWall, TypeAndDictionary);
   }
   #endif
   
   // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
   
   Foam::WernerWengleLawOfTheWall::WernerWengleLawOfTheWall
   (
       const dictionary & dict
   )
   :
       LawOfTheWall(dict),
       A_(constDict_.lookupOrAddDefault<scalar>("A", 8.3)),
       B_(constDict_.lookupOrAddDefault<scalar>("B", 0.14285714285714285))
   {
       if (debug)
       {        
           printCoeffs();
       }
       
   }
   
   Foam::WernerWengleLawOfTheWall::WernerWengleLawOfTheWall
   (
       const word & lawName,
       const dictionary & dict
   )
   :
       WernerWengleLawOfTheWall(dict)
   {
   }
   
   
   Foam::WernerWengleLawOfTheWall::WernerWengleLawOfTheWall
   (
       const scalar A,
       const scalar B
   )
   :
       LawOfTheWall(),
       A_(A),
       B_(B)
   {
   
       constDict_.add("A", A);
       constDict_.add("B", B);
       
       if (debug)
       {        
           printCoeffs();
       }
   }
   
   // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
   
   void Foam::WernerWengleLawOfTheWall::printCoeffs() const
   {
       Info<< nl << "WernerWengle law of the wall" << nl;
       Info<< token::BEGIN_BLOCK << incrIndent << nl;
       Info<< indent << "A" << indent << A_ << nl;
       Info<< indent << "B" << indent <<  B_ << nl;
       Info<< token::END_BLOCK << nl << nl;
   }
   
   
   Foam::scalar Foam::WernerWengleLawOfTheWall::value
   (
       const SingleCellSampler & sampler,
       label index,
       scalar uTau,
       scalar nu
   ) const
   {  
       const scalarListIOList & U = sampler.db().lookupObject<scalarListIOList>("U");
   
       scalar u = mag(vector(U[index][0], U[index][1], U[index][2]));
       scalar y = sampler.h()[index];
       return value(u, y, uTau, nu);
   }
   
   
   Foam::scalar Foam::WernerWengleLawOfTheWall::value
   (
       scalar u,
       scalar y,
       scalar uTau,
       scalar nu
   ) const
   {  
       scalar uPlus = u/uTau;
       scalar yPlus = y*uTau/nu;
       scalar yPlusM = pow(A_, 1/(1-B_));
       
       if (yPlus <= yPlusM)
       {
           return uPlus - yPlus;
       }
       else
       {
           return uPlus - A_*pow(yPlus, B_);
       }
   }
   
   
   Foam::scalar Foam::WernerWengleLawOfTheWall::derivative
   (
       const SingleCellSampler & sampler,
       label index,
       scalar uTau,
       scalar nu        
   ) const
   {
       const scalarListIOList & U = sampler.db().lookupObject<scalarListIOList>("U");
   
       scalar u = mag(vector(U[index][0], U[index][1], U[index][2]));
       scalar y = sampler.h()[index];
       return derivative(u, y, uTau, nu);
   }
   
   
   Foam::scalar Foam::WernerWengleLawOfTheWall::derivative
   (
       scalar u,
       scalar y,
       scalar uTau,
       scalar nu        
   ) const
   {
       scalar yPlus = y*uTau/nu;
       scalar yPlusM = pow(A_, 1/(1-B_));
   
       if (yPlus <= yPlusM)
       {
           return -u/sqr(uTau) - y/nu;
       }
       else
       {
           return -u/sqr(uTau) - A_*B_*pow(y/nu, B_)*pow(uTau, B_-1);
       }
   }
   
   // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //