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-   -   MRF rotation in unstady simulation (http://www.cfd-online.com/Forums/cd-adapco/102211-mrf-rotation-unstady-simulation.html)

Clementhuon May 25, 2012 02:45

MRF rotation in transient simulation
 
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Hi everyone,

I'm doing some transient simulation on a brake system. To simulate the brake disc, I created a new region with a specific motion (here a rotation). The simulation looks to run fine, I can see with a .case file that my wheel and my brake disc are mooving as expected.

But by looking clother I found a problem in the velocity profile on the disc. This one should have a velocity distribution with a revolution symetry (he turns around a rotation axis) but this is not the case (see the picture below).

For information, I'm running the simultion in unsteady (after steady initialization) in coupled, with a time step of 5e-5 s, the rotation velocity is 1200 rpm.

Does anyone got an idea ??

Thanks

Clement


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