Cd Cl coefficient

Jane · June 3, 2009, 22:39

Hai, wanna ask actually how to get Cd and Cl coefficient? Is it using reference value compute from inlet? or is it have another way? is it right using cd and cl value when iteration converge?Coz if use reference value method, my Cl and Cd extremely small.
Thx

-mAx- · June 4, 2009, 02:32

Coefficients are computed with Reference Values, which you have to set up in Report/Reference Values.

Jane · June 4, 2009, 03:35

Quote:

Originally Posted by -mAx-

Coefficients are computed with Reference Values, which you have to set up in Report/Reference Values.

In reference values, what i should put for area? For my case is to simulate flow passing an airplane, then in order to calculate Cd and Cl, what area I should put in?
How about the length?
Thx

-mAx- · June 4, 2009, 05:37

They are typicall values from the body you are computing the force.
The values won't affect the force results.
check the definition of Cd and Cl

June 3, 2009, 22:39	Cd Cl coefficient	#1
Jane New Member Jane Join Date: Mar 2009 Posts: 18 Rep Power: 17	Hai, wanna ask actually how to get Cd and Cl coefficient? Is it using reference value compute from inlet? or is it have another way? is it right using cd and cl value when iteration converge?Coz if use reference value method, my Cl and Cd extremely small. Thx

June 4, 2009, 02:32		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Coefficients are computed with Reference Values, which you have to set up in Report/Reference Values. __________________ In memory of my friend Hervé: CFD engineer & freerider

June 4, 2009, 05:37		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	They are typicall values from the body you are computing the force. The values won't affect the force results. check the definition of Cd and Cl __________________ In memory of my friend Hervé: CFD engineer & freerider

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