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Performing Simulation of CRM and getting abnormal results of Cl and Cd

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Old   May 18, 2012, 11:58
Exclamation Performing Simulation of CRM and getting abnormal results of Cl and Cd
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Sulman Aziz
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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..?
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
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Old   May 18, 2012, 12:31
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Sijal Ahmed Memon (turboenginner@gmail.com)
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some more details and what values you are getting of lift and drag. some pics of mesh and geometry.

What does mean by CRM?
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Old   May 18, 2012, 13:21
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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
Attached Images
File Type: jpg Common Research Model (CRM).jpg (86.4 KB, 3 views)
File Type: jpg Surface Mesh Quality.jpg (99.9 KB, 3 views)
File Type: jpg Prism Mesh Quality (Volume).jpg (100.5 KB, 3 views)
File Type: jpg Cd Convergence Plot.jpg (98.4 KB, 5 views)
File Type: jpg Cl Convergence Plot.jpg (99.7 KB, 3 views)
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Old   May 18, 2012, 13:23
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what is CRM?
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Old   May 18, 2012, 13:34
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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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