UEqn.H

/*---------------------------------------------------------------------------*\
     ██╗████████╗██╗  ██╗ █████╗  ██████╗ █████╗       ███████╗██╗   ██╗
     ██║╚══██╔══╝██║  ██║██╔══██╗██╔════╝██╔══██╗      ██╔════╝██║   ██║
     ██║   ██║   ███████║███████║██║     ███████║█████╗█████╗  ██║   ██║
     ██║   ██║   ██╔══██║██╔══██║██║     ██╔══██║╚════╝██╔══╝  ╚██╗ ██╔╝
     ██║   ██║   ██║  ██║██║  ██║╚██████╗██║  ██║      ██║      ╚████╔╝
     ╚═╝   ╚═╝   ╚═╝  ╚═╝╚═╝  ╚═╝ ╚═════╝╚═╝  ╚═╝      ╚═╝       ╚═══╝
 
 * 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/>.
\*---------------------------------------------------------------------------*/
 
// Solve the momentum equation
 
MRF.correctBoundaryVelocity(U);
 
fvVectorMatrix UEqn
(
    fvm::ddt(U) + fvm::div(phi, U)
    + MRF.DDt(U)
    + turbulence->divDevReff(U)
    ==
    fvOptions(U)
);
 
UEqn.relax();
 
fvOptions.constrain(UEqn);
 
if (pimple.momentumPredictor())
{
    solve
    (
        UEqn
        ==
        fvc::reconstruct
        (
            (
                - ghf * fvc::snGrad(rhok)
                - fvc::snGrad(p_rgh)
            ) * mesh.magSf()
        )
    );
    fvOptions.correct(U);
}