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

sulmanaziz · May 18, 2012, 10:58

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

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

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..

May 18, 2012, 10:58	Performing Simulation of CRM and getting abnormal results of Cl and Cd	#1
sulmanaziz New Member Sulman Aziz Join Date: May 2012 Posts: 8 Rep Power: 13	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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May 18, 2012, 11:31		#2
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	some more details and what values you are getting of lift and drag. some pics of mesh and geometry. What does mean by CRM?

May 18, 2012, 12:23		#4
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	what is CRM?

May 18, 2012, 12:34		#5
sulmanaziz New Member Sulman Aziz Join Date: May 2012 Posts: 8 Rep Power: 13	CRM is abbreviation for Common Research Model.. I had mentioned it in the image of model. Its airplane DLR- F6 geometry..