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Old   August 2, 2005, 06:58
Default BLUFF BODY+ RSM
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Anto
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I'm studing a bluff body subject to wind. I applied Spalart Allmaras and K-epsilon realizable, but I got different results. So I was thinking to compare them with RSM model. I'm doubtful about the values of the constants assigned by default by Fluent. Are the constants appropriate in the case of an incompressible fluid? Thanks in advance! Anto
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Old   August 2, 2005, 16:16
Default Re: BLUFF BODY+ RSM
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Bikash Mishra
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I have done similar simulations but subject to water. In my experience, RSM model produces more accurate results and the default constants seem to be appropriate (I am assuming you calculate the values of k and epsilon though). However, the K-epsilon model is more dissipative. So this may cast shadows over the default values.
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Old   August 3, 2005, 06:09
Default Re: BLUFF BODY+ RSM
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Anto
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Thanks! I have calculated the intensity of turbulence and the lenght instead of k and epsilon. I set a ddp steady case with RSM with the 1st order accuracy at the beginning and after, to second order, but the cd is diverging. Any suggestions? Thanks again! Anto
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