applications/solvers/incompressible/pimpleFoam/SRFPimpleFoam/UrelEqn.H

   1     // Relative momentum predictor
   2     tmp<fvVectorMatrix> UrelEqn
   3     (
   4         fvm::ddt(Urel)
   5       + fvm::div(phi, Urel)
   6       + turbulence->divDevReff(Urel)
   7       + SRF->Su()
   8     );
   9
  10     UrelEqn().relax();
  11
  12     solve(UrelEqn() == -fvc::grad(p));