UEqnPiso.H

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// Solve the Momentum equation
 
if (hasFvSource_)
{
    // update the actuator source term
    daFvSourcePtr_->calcFvSource(fvSource);
}
 
fvVectorMatrix UEqn(
    fvm::ddt(U)
    + fvm::div(phi, U)
    + turbulencePtr_->divDevReff(U)
    - fvSource);
 
UEqn.relax();
 
if (piso.momentumPredictor())
{
    // get the solver performance info such as initial
    // and final residuals
    SolverPerformance<vector> solverU = solve(UEqn == -fvc::grad(p));
 
    this->primalResidualControl<vector>(solverU, printToScreen, printInterval, "U");
}