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August 5, 2019, 09:24 |
k and omega initial value in 0 directory
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#1 |
New Member
Febrian Akhmad Baehaqi
Join Date: Jul 2019
Location: Bandung
Posts: 5
Rep Power: 6 |
Hi guys. I need some help.
Currently I am running a simulation on a UAV MALE and using simpleFoam as the solver. The Reynolds Number is about 2e+06. I am a bit confused about how I set the initial value of the k and Omega in the 0 directory. When I read the previous forum someone said that the initial value of k and Omega is independent from the solution or the initial value of k and omega does not affect the results. But when I set a different initial value of k and Omega I keep getting different values of Cl and Cd. I have already tried to compute from this page https://www.cfd-online.com/Wiki/Turb...ary_conditions But I do not know the turbulence intensity of my flow because the value of root-mean-square of the turbulent velocity fluctuations (u') and k. I also attach my 0 directory. I really appreciate all the help from you guys. Thank you very much.. |
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June 23, 2020, 08:35 |
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#2 |
Senior Member
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 355
Rep Power: 8 |
https://www.cfd-online.com/Tools/turbulence.php
use this tool to find your initial values for turbulence properties. in my case, my simulation results are not sensitive to initial values of turbulence properties. but thats not a generalisation of course. you need to test your case. |
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