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foam-extend4.1-coherent-io/applications/solvers/compressible/steadyUniversalMRFFoam/iEqn.H

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{
// Create relative velocity
Urel == U;
mrfZones.relativeVelocity(Urel);
// Create rotational velocity (= omega x r)
Urot == U - Urel;
fvScalarMatrix iEqn
(
fvm::ddt(rho, i)
+ fvm::div(phi, i)
- fvm::laplacian(turbulence->alphaEff(), i)
==
// Viscous heating: note sign (devRhoReff has a minus in it)
- (turbulence->devRhoReff() && fvc::grad(U))
);
iEqn.relax();
eqnResidual = iEqn.solve().initialResidual();
maxResidual = max(eqnResidual, maxResidual);
// From rothalpy, calculate enthalpy after solution of rothalpy equation
h = i + 0.5*(magSqr(Urot) - magSqr(Urel));
h.correctBoundaryConditions();
// Update thermo for new h
thermo.correct();
psis = thermo.psi()/thermo.Cp()*thermo.Cv();
}