.. _program_listing_file_lawsOfTheWall_ReichardtLawOfTheWall_ReichardtLawOfTheWall.C:

Program Listing for File ReichardtLawOfTheWall.C
================================================

|exhale_lsh| :ref:`Return to documentation for file <file_lawsOfTheWall_ReichardtLawOfTheWall_ReichardtLawOfTheWall.C>` (``lawsOfTheWall/ReichardtLawOfTheWall/ReichardtLawOfTheWall.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 "ReichardtLawOfTheWall.H"
   #include "dictionary.H"
   #include "error.H"
   #include "addToRunTimeSelectionTable.H"
   #include "scalarListIOList.H"
   #include "SingleCellSampler.H"
   
   #if !defined(DOXYGEN_SHOULD_SKIP_THIS)
   namespace Foam
   {
       defineTypeNameAndDebug(ReichardtLawOfTheWall, 0);
       addToRunTimeSelectionTable(LawOfTheWall, ReichardtLawOfTheWall, Dictionary);
       addToRunTimeSelectionTable(LawOfTheWall, ReichardtLawOfTheWall, TypeAndDictionary);
   }
   #endif
   
   // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
   
   Foam::ReichardtLawOfTheWall::ReichardtLawOfTheWall
   (
       const scalar kappa,
       const scalar B1,
       const scalar B2,
       const scalar C
   )
   :
       LawOfTheWall(),
       kappa_(kappa),
       B1_(B1),
       B2_(B2),
       C_(C)
   {
       constDict_.add("kappa", kappa);
       constDict_.add("B1", B1);
       constDict_.add("B2", B2);
       constDict_.add("C", C);
   
       if (debug)
       {        
           printCoeffs();
       }
   
   }
   
   Foam::ReichardtLawOfTheWall::ReichardtLawOfTheWall
   (
       const dictionary & dict
   )
   :
       LawOfTheWall(dict),
       kappa_(constDict_.lookupOrAddDefault<scalar>("kappa", 0.4)),
       B1_(constDict_.lookupOrAddDefault<scalar>("B1", 11)),
       B2_(constDict_.lookupOrAddDefault<scalar>("B2", 3)),
       C_(constDict_.lookupOrAddDefault<scalar>("C", 7.8))
   {
       if (debug)
       {        
           printCoeffs();
       }
       
   }
   
   Foam::ReichardtLawOfTheWall::ReichardtLawOfTheWall
   (
       const word & lawName,
       const dictionary & dict
   )
   :
       ReichardtLawOfTheWall(dict)
   {
   }
   
   
   // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
   
   void Foam::ReichardtLawOfTheWall::printCoeffs() const
   {
       Info<< nl << "Reichardt law of the wall" << nl;
       Info<< token::BEGIN_BLOCK << incrIndent << nl;
       Info<< indent << "kappa" << indent << kappa_ << nl;
       Info<< indent << "B1" << indent <<  B1_ << nl;
       Info<< indent << "B2" << indent <<  B2_ << nl;
       Info<< indent << "C" << indent <<  C_ << nl;
       Info<< token::END_BLOCK << nl << nl;
   }
   
   
   Foam::scalar Foam::ReichardtLawOfTheWall::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::ReichardtLawOfTheWall::value
   (
       scalar u,
       scalar y,
       scalar uTau,
       scalar nu
   ) const
   {
       scalar uPlus = u/uTau;
       scalar yPlus = y*uTau/nu;
   
       return uPlus - 1/kappa_*log(1 + kappa_*yPlus) -
              C_*(1 - exp(-yPlus/B1_) -
              yPlus/B1_*exp(-yPlus/B2_));
   }
   
   
   Foam::scalar Foam::ReichardtLawOfTheWall::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::ReichardtLawOfTheWall::derivative
   (
       scalar u,
       scalar y,
       scalar uTau,
       scalar nu
   ) const
   {
       scalar uPlus = u/uTau;
       scalar yPlus = y*uTau/nu;
       
       return -uPlus/uTau - y/nu/(1 + kappa_*yPlus) - 
              C_*y/(nu*B1_)*(exp(-yPlus/B1_) -
              exp(-yPlus/B2_) + yPlus/B2_*exp(-yPlus/B2_));
   }
   
   // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //