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-   -   Performing Simulation of CRM and getting abnormal results of Cl and Cd (http://www.cfd-online.com/Forums/fluent/101974-performing-simulation-crm-getting-abnormal-results-cl-cd.html)

sulmanaziz May 18, 2012 10:58

Performing Simulation of CRM and getting abnormal results of Cl and Cd
 
Hi everyone,
I am performing the simulation of NASA CRM using ANSYS Fluent 14.0, I have created an unstructured mesh using ICEM CFD. I have few questions..
1. I don't know why i m getting abnormal values of Cl and Cd..:rolleyes:?
2. Can anyone tell me how to set the reference values..?

May be i have put in the wrong reference values.

The values that i am using are
Area: 4130 ft^2
Length: 1190 ft

I shall b very thankful for your help.

Regards
Sulman Aziz :)

Far May 18, 2012 11:31

some more details and what values you are getting of lift and drag. some pics of mesh and geometry.

What does mean by CRM?

sulmanaziz May 18, 2012 12:21

5 Attachment(s)
Thank your very much for this quick response.
I have attached the files of geometry, mesh and convergence history plots of Cd and Cl.
The current values for Cl = -1.0880e+01
Cd = 2.3813e+01

Far May 18, 2012 12:23

what is CRM?

sulmanaziz May 18, 2012 12:34

CRM is abbreviation for Common Research Model.. I had mentioned it in the image of model.
Its airplane DLR- F6 geometry..


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