Commit ed1f5edd authored by Spencer Sherwin's avatar Spencer Sherwin
Browse files

CFL checker for Inc Navier Stokes


git-svn-id: https://gforge.sci.utah.edu/svn/nektar/trunk@4013 305cdda6-5ce1-45b3-a98d-dfc68c8b3305
parent 48cccb65
///////////////////////////////////////////////////////////////////////////////
//
// File CLFtester.cpp
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// License for the specific language governing rights and limitations under
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Description: CFL tester solve routines
//
///////////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <IncNavierStokesSolver/EquationSystems/IncNavierStokes.h>
namespace Nektar
{
NekDouble IncNavierStokes::v_GetTimeStep(const Array<OneD,int> ExpOrder, const Array<OneD,NekDouble> CFL, NekDouble timeCFL)
{
int nvariables = m_fields.num_elements(); // Number of variables in the mesh
int nTotQuadPoints = GetTotPoints();
int n_element = m_fields[0]->GetExpSize();
Array<OneD, NekDouble> tstep(n_element,0.0);
const NekDouble minLengthStdTri = 1.414213;
const NekDouble minLengthStdQuad = 2.0;
const NekDouble cLambda = 0.2; // Spencer book pag. 317
Array<OneD, NekDouble> stdVelocity(n_element,0.0);
Array<OneD, Array<OneD, NekDouble> > velfields(m_velocity.num_elements());
for(int i = 0; i < m_velocity.num_elements(); ++i)
{
velfields[i] = m_fields[m_velocity[i]]->UpdatePhys();
}
stdVelocity = GetStdVelocity(velfields);
for(int el = 0; el < n_element; ++el)
{
int npoints = m_fields[0]->GetExp(el)->GetTotPoints();
tstep[el] = CFL[el]/(stdVelocity[el]*cLambda*(ExpOrder[el]-1)*(ExpOrder[el]-1));
}
NekDouble TimeStep = Vmath::Vmin(n_element,tstep,1);
return TimeStep;
}
NekDouble IncNavierStokes::v_GetTimeStep(int ExpOrder, NekDouble CFL, NekDouble TimeStability)
{
Array<OneD, int> ExpOrderList(m_fields[0]->GetExpSize(),ExpOrder);
Array<OneD, NekDouble> CFLList(m_fields[0]->GetExpSize(),CFL);
return v_GetTimeStep(ExpOrderList,CFLList,TimeStability);
}
}
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