scalar_advection_elements.cc

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//LIC// ====================================================================
//LIC// This file forms part of oomph-lib, the object-oriented, 
//LIC// multi-physics finite-element library, available 
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//LIC//    Version 1.0; svn revision $LastChangedRevision$
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//LIC// Copyright (C) 2006-2016 Matthias Heil and Andrew Hazel
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//LIC// This library is free software; you can redistribute it and/or
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//LIC// version 2.1 of the License, or (at your option) any later version.
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//Non-inline member function of the flux transport elements class

#include "scalar_advection_elements.h"

namespace oomph
{
 //=========================================================
 /// \short Return the flux as a function of the unknowns
 //=========================================================
 template<unsigned DIM>
 void ScalarAdvectionEquations<DIM>::
 flux(const Vector<double> &u, DenseMatrix<double> &f)
 {
  //Get the wind
  Vector<double> W(DIM);
  Vector<double> s(DIM), x(DIM);
  //Dummy integration point
  unsigned ipt=0;
  this->get_wind_scalar_adv(ipt,s,x,W);
  
  //Flux is the wind multiplied by the flux
  for(unsigned j=0;j<DIM;j++) {f(0,j) = W[j]*u[0];}
 }
 
 //======================================================================
 /// \short Return the flux derivatives as a function of the unknowns
 //=====================================================================
 template<unsigned DIM>
 void ScalarAdvectionEquations<DIM>::
 dflux_du(const Vector<double> &u, RankThreeTensor<double> &df_du)
 {
  const unsigned n_flux = this->nflux();
   
   //Get the wind
   Vector<double> W(DIM);
   Vector<double> s(DIM), x(DIM);
   //Dummy integration point
   unsigned ipt=0;
   this->get_wind_scalar_adv(ipt,s,x,W);

   df_du.initialise(0.0);

   for(unsigned i=0;i<n_flux;i++)
    {
     for(unsigned j=0;j<DIM;j++)
      {
       df_du(i,j,i) = W[j];
      }
    }
  }

 template class ScalarAdvectionEquations<1>;
 template class ScalarAdvectionEquations<2>;
 template class ScalarAdvectionEquations<3>;

}