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Convective diffusion

Posted 13 oct. 2011, 04:26 UTC−4 0 Replies

Lasse Murtomäki
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Has anybody an idea how to speed up the solution of the convective diffusion equation? First I solve Navier-Stokes, and then use the velocity field in convective diffusion. Simulating 100 sec took 35 hours with a Linux workstation with 16 GB RAM, because the convergence is very bad, ~100, i.e. the time steps are of the order of milliseconds. The number of elements is not that large, ca. 30,000. I have tried different stabilization parameters without success.

The problem is 3D and and cannot be reduced to, say, 2D with axial symmetry. Flow rate is rather low, Reynolds number ~2.
0 Replies Last Post 13 oct. 2011, 04:26 UTC−4
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Hello Lasse Murtomäki

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