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- - **Extra term in the Xoodle solver for Psi**
(*http://www.cfd-online.com/Forums/openfoam-solving/58983-extra-term-xoodle-solver-psi.html*)

Hi there,
I am following the Hi there,
I am following the equation for Psi for turbulent deflagration. It looks as: solve ( 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 ) ); I quiet understand all the terms but: -fvm::Sp(fvc::div(phiXi), Xi) This term is div(phiXi,Xi) but it is already included in fvm::div(phi + phiXi, Xi, "div(phiXi,Xi)") and is after substracted?. There is something not clear to me about how this term is included in the equation. thanks Sergio |

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