Hi,
I'm beginner in CFDEM. I've runned SttlingTestMPI tutorial and dranw the numerical and analytical velocities using the routine in octave. The results seem ok but when the particle reaches the terminal velocity, the velocity slightly oscilates. I think the oscilations are caused by the transition of the particle from one cell to the other. Theoretically, as shown by the analytical results the velocity should be constant. Is there any possibility to improve the numerical results to reach a constant velocity?. I add the file generated by Octave in eps.
Thanks.
Best regards
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alice | Fri, 01/04/2013 - 08:33
Good morning,
Good morning,
your are right, the oscillations stem from the coarse mesh. The case is chosen in such a way that it can be completed in litte time on most machines. Being a test tutorial its main purpose is to check the installation and to show the main idea of such a case, rather than to yield most accurate results. If you use a finer mesh for the simulation you will see that the results will improve!
Cheers,
Alice