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Old   August 26, 2005, 15:25
Default Natural Convection
Kaiser Matin
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For hex mesh what should be the convergence control relaxation factors. The default settings are too slow to converge. I think sI read somewhere that second order upwinding would be better. But I don't have the book with me right now. Any suggestions for fast convergence schemes for natural convection? Thanks.
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Old   August 29, 2005, 12:17
Default Re: Natural Convection
Evan Rosenbaum
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We always increase underrelaxations for energy to 0.98 and body force to 0.85 or higher. These drive the solution in buoyancy and are most critical in natural convection problems.
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