UEqn.H

/*---------------------------------------------------------------------------*\
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 * In real Time Highly Advanced Computational Applications for Finite Volumes
 * Copyright (C) 2017 by the ITHACA-FV authors
-------------------------------------------------------------------------------
  License
  This file is part of ITHACA-FV
  ITHACA-FV is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  ITHACA-FV 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 Lesser General Public License for more details.
  You should have received a copy of the GNU Lesser General Public License
  along with ITHACA-FV. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
// Momentum predictor
 
MRF.correctBoundaryVelocity(U);
 
tmp<fvVectorMatrix> tUEqn
(
    fvm::div(phi, U)
    + MRF.DDt(U)
    + turbulence->divDevReff(U)
    ==
    fvOptions(U)
);
fvVectorMatrix& UEqn = tUEqn.ref();
 
UEqn.relax();
 
fvOptions.constrain(UEqn);
 
if (simple.momentumPredictor())
{
    uresidual_v = solve(UEqn == -fvc::grad(p)).initialResidual();
    fvOptions.correct(U);
}