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November 29, 2013, 11:13 |
Unstable BuoyantBoussinesqSimpleFoam
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#1 |
Senior Member
jeff osborne
Join Date: Mar 2010
Posts: 108
Rep Power: 16 |
Hello all,
I'm trying to solve a relatively simple steady-state heat transfer problem in a duct but I cannot get my solution to converge. I am using the BuoyantBoussinesqSimpleFoam solver. I've been able to get a converged solution using simpleFoam without heat transfer. I have attached a link to my case below. Any help would be greatly appreciated. Thanks! Link to case: http://www.speedyshare.com/hXuEP/R1-...-PR1.84.tar.gz |
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November 29, 2013, 11:46 |
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#2 |
Senior Member
jeff osborne
Join Date: Mar 2010
Posts: 108
Rep Power: 16 |
Something to add to this is that there is clearly something wrong with my calculation of p_rgh, as it does not converge in each iteration. See output below:
Code:
Time = 8 DILUPBiCG: Solving for Ux, Initial residual = 0.0164766, Final residual = 4.00432e-06, No Iterations 1 DILUPBiCG: Solving for Uy, Initial residual = 0.0539052, Final residual = 1.43627e-05, No Iterations 1 DILUPBiCG: Solving for T, Initial residual = 0.00648091, Final residual = 2.69615e-08, No Iterations 1 DICPCG: Solving for p_rgh, Initial residual = 0.0574019, Final residual = 0.169052, No Iterations 1001 time step continuity errors : sum local = 0.473557, global = -0.000529186, cumulative = -0.00322094 DILUPBiCG: Solving for epsilon, Initial residual = 0.000177516, Final residual = 7.06656e-08, No Iterations 1 DILUPBiCG: Solving for k, Initial residual = 0.00285575, Final residual = 1.46059e-06, No Iterations 1 ExecutionTime = 54.25 s ClockTime = 54 s |
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