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Strange temperatur flow in buoyantBoussinesqSimpleFoam with viscous heating |
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June 30, 2012, 09:11 |
Strange temperatur flow in buoyantBoussinesqSimpleFoam with viscous heating
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New Member
Join Date: Dec 2011
Posts: 12
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Hi all,
i need your help, please. I have added viscous heating to buoyantBoussinesqSimpleFoam. Everythink works fine, but now i have a strange heat flow in my testcase. I have a modell, similar to the driven cavity case, but with the upper and the lower wall running against each other. Both moving walls have fixed temperatur value of 300K. just to get a steady state solution. The internal field is also at 300K. here is what i get from my solver, slice through the cavity and a plot over line from top to bottom: Here is my code for my TEqn.H: Code:
{ kappat = turbulence->nut()/Prt; kappat.correctBoundaryConditions(); volScalarField kappaEff("kappaEff", turbulence->nu()/Pr + kappat); fvScalarMatrix TEqn ( fvm::div(phi, T) - fvm::Sp(fvc::div(phi), T) - fvm::laplacian(kappaEff, T) - ((U & fvc::grad(p)) / Cp) - (((turbulence->nuEff() / Cp) * (fvc::grad(U) + fvc::grad(U)().T())) && fvc::grad(U)) ); TEqn.relax(); TEqn.solve(); rhok = 1.0 - beta*(T - TRef); } I hope you can help me. thanks a lot! Greetings Sebastian |
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