# XiFoam equations

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 March 18, 2012, 23:08 XiFoam equations #1 Member   ak Join Date: May 2011 Posts: 71 Rep Power: 6 Hi Could someone please translate the XiFoam code below into equation form? I want to check how they relate to the equations from Weller's paper: Basically I want to see how Us(.)(grad (rho Xi)) in the transport equation for Xi equals fvm::div(phi + phiXi, Xi, "div(phiXi,Xi)") - fvm::Sp(fvc::div(phiXi), Xi) surfaceScalarField phiXi = phiSt – fvc::interpolate(fvc::laplacian(turbulence->alphaEff(), b)/mgb)*nf + fvc::interpolate(rho)*fvc::interpolate(Su*(1.0/Xi - Xi))*nf; fvScalarMatrix XiEqn ( fvm::ddt(rho, Xi) + fvm::div(phi + phiXi, Xi, "div(phiXi,Xi)") - fvm::Sp(fvc::div(phiXi), Xi) == rho*R - fvm::Sp(rho*(R - G), Xi) - fvm::Sp(rho*max(sigmat-sigmas,dimensionedScalar("0",sigmat.dimensions(), 0)),Xi) ); XiEqn.relax(); XiEqn.solve(); -------------------- Thanks so much! ak

 March 22, 2012, 03:32 #2 Senior Member   Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 577 Blog Entries: 5 Rep Power: 13 Hi, did you read http://www.tfd.chalmers.se/~hani/kur...sariReport.pdf Tutorial XiFoam Version: OpenFOAM-1.7.x Author:Ehsan Yasari

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