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September 14, 2015, 15:21 |
K and Omega Profiles in Fluent
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#1 |
New Member
Jimmi
Join Date: Dec 2012
Posts: 11
Rep Power: 13 |
Hi all,
I am having a small issue with matching experimental data in Fluent 15.0 using standard k- model. From the experimental data obtained I have an x-velocity profile and corresponding RMS profile for the inlet conditions. In Fluent there are various way to specify the turbulence (via hydraulic diamter etc), however, I want to use the actual RMS profile. The method I have used thus far is to assume isotropic turbulence and determine the turbulent kinetic energy profile from: , where is the RMS profile in the x-direction (length). specified in the Fluent manual is given by , where = 0.09, and is specified above. I have found an approximation to is various papers, listed as . Based on a wind tunnel velocity of approx. and turbulence intensity of approx. 1.1%, this equates to average values of and . Is this the correct approach/equations given the experimental data? Many thanks for any input, Hob Last edited by hob; September 15, 2015 at 01:49. |
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November 13, 2015, 08:06 |
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#2 |
Senior Member
Join Date: Jul 2009
Posts: 260
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Quote:
Did you ever come to a conclusion about this? Cheers, |
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November 13, 2015, 11:14 |
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#3 | |
New Member
Jimmi
Join Date: Dec 2012
Posts: 11
Rep Power: 13 |
Quote:
I also used hydraulic diameter, although varying the dissipation rate seemed to make little difference compared to variance between turbulence models, Regards, Hob Last edited by hob; November 13, 2015 at 23:46. |
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