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July 29, 2009, 00:50 |
Turbulence models
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#1 |
New Member
MARK
Join Date: Apr 2009
Posts: 9
Rep Power: 16 |
Hello everyone I am using Phoenics for studying wind environment in downtown area,
Could you please tell me which Turbulence model is better for evaluation of wind environment in downtown area? I try to use the KEMMK in KE Variants, is that ok? but i found it looks the same as KEMODL according the the constants in both of them, also can i change the roughness parameter in the setting of this RANS model, i want to change it to 0.27 the same as i did in wind tunnel experiments. Thank you very much for your help |
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July 29, 2009, 10:57 |
statistical turbulence models for wind engineering
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#2 |
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michael malin
Join Date: Mar 2009
Location: london
Posts: 33
Rep Power: 18 |
The Kato-Launder & Murakami et al variants of the k-e model are reported to perform better than the standard k-e model for flow around buildings. Both are available in PHOENICS, and they are documented here:
http://www.cham.co.uk/phoenics/d_pol...od/enc_mmk.htm The empirical constants of the standard model are retained, but differences arise in the modelling practices, i.e. modified production rate or eddy-viscosity relationship. The main issue is to improve the representation of irrotational strain. |
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July 30, 2009, 01:16 |
Thank you
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#3 |
New Member
MARK
Join Date: Apr 2009
Posts: 9
Rep Power: 16 |
Thank you very much it is very helpful
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January 18, 2010, 14:44 |
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#4 |
New Member
ok
Join Date: Mar 2009
Posts: 17
Rep Power: 16 |
salut I want to enter the velocity like V=ax+b on a in a bubbly two phase flows
--------------------- - x-_______> flows - - ---------------------- y |
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