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May 14, 2010, 12:03 |
What is FLUENT's RANS filter?
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#1 |
Senior Member
Jouke de Baar
Join Date: Oct 2009
Posts: 127
Rep Power: 16 |
Hi, I'm a bit confused here. I always thought FLUENT uses a time-average RANS filter. Is this correct? I can understand this for a unsteady solver, but how does this work out for a steady solver?
Tanks! |
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May 14, 2010, 14:04 |
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#2 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 16 |
"RANS" means "Reynolds-Averaged Navier-Stokes", and Reynolds-Averaging is a form of time averaging. So if you solve the RANS equations, then you're solving a time-averaged form of the equations.
This time-averaging has nothing to do with the solver you are using. If you use the unsteady solver, then you are marching in time and solving time-accurately. If you use the steady-state solver, then you are still marching in time until you get to steady-state, but not solving time-accurately. |
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May 14, 2010, 16:53 |
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#3 |
Senior Member
Jouke de Baar
Join Date: Oct 2009
Posts: 127
Rep Power: 16 |
Thank you very much!
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