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December 31, 2011, 03:53 |
moment defining
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#1 |
New Member
mohongtao
Join Date: Dec 2011
Posts: 5
Rep Power: 14 |
hello everyone:
I want to know how Fluent define the Moment Coefficient, Was it defined as: cm=M/(0.5*density*v*v)? or someelse form. thanks a lot! |
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December 31, 2011, 06:41 |
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#2 |
Senior Member
duri
Join Date: May 2010
Posts: 245
Rep Power: 16 |
cm=M/(0.5*density*area*length*V*V), all taken from reference values.
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January 3, 2012, 22:12 |
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#3 |
New Member
mohongtao
Join Date: Dec 2011
Posts: 5
Rep Power: 14 |
Duri,thanks for your attention
now,I have known that cm=M/(0.5*density*area*length*V*V), and all taken from reference values. I also use Fluent Function compute_force_and_moment to get the moment,then i used the moment to get cm, I found that this cm was diffenent from the Monitors-Force-CM, Could you tell me why? |
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January 4, 2012, 13:29 |
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#4 |
Senior Member
duri
Join Date: May 2010
Posts: 245
Rep Power: 16 |
It will be same. Check moment origin, axis etc.
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January 5, 2012, 04:18 |
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#5 |
New Member
mohongtao
Join Date: Dec 2011
Posts: 5
Rep Power: 14 |
I think i have misused this function, could you give me a UDF that contains this function, thank you very much!
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