buoyantBoussinesqSimpleFoam convergence problem.
I am trying to get a buoyantBoussinesqSimpleFoam simulation with a k-eps turbulence model to converge, but it never does. The output states that the residuals are smaller than the SIMPLE tolerances, but it still doesn't stop.
Here is an example output: Code:
DILUPBiCG: Solving for Ux, Initial residual = 0.00776199, Final residual = 3.05559e-05, No Iterations 1 Code:
solvers If it matters: The case is 2D with a cold circle in the center, hot walls on the sides and below, and an insulating boundary above. Gravity points down. Solver is buoyantBoussinesqSimpleFoam. Any help and tips will be appreciated! |
Exact same problem
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Hi all,
I am facing a similar problem. My last time step residuals are Code:
DILUPBiCG: Solving for Ux, Initial residual = 1.13167e-09, Final residual = 1.13167e-09, No Iterations 0 Code:
solvers Q: Why hasn't the solution converged even though the SIMPLE tolerances have been met? Any help would be great! |
Hi,
I remember I was faced with the same problems with the buoyantSimpleFoam. The residual never goes down below 1e-6. I had no idea why. |
I have tried increasing the pseudo time step in the controlDict. There are no oscillation if I do that but the solution diverges after a few iterations. Again, have no idea why.
I'm using OF 2.2.2, by the way. |
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