how to get aero-coefficient cL,cD value in starCD

July 25, 2007, 00:38

fernds, i have solving a problem of a UAV payload. i want to know how can i determine the value of cL & cD after the solution. in Engineering-data monitor we get the value of Tx,Ty,Tz etc....but can't we directly get cL,cD,cM...etc in post-processing??

July 25, 2007, 03:27

Two solutions to this one.

1. Call CD-adapco because they have received so many requests for this one down the years that some macros are available for this STAR-CD issue.

2. Migrate to STAR-CCM+ where forces, moments and the rest of it is automated and included as standard.

Regards

July 25, 2007, 09:12

Have you tried Acoeff ?

July 26, 2007, 02:32

wat is "Acoeff"??? whr can i find it?

July 26, 2007, 04:39

You can get it from user manual page 9-26. I paste the explanation over here.

Calculating aerodynamic coefficients â€" command ACOEFF. This facility works in conjunction with values of total force components at the wall, loaded via the Wall Post Data dialog. A set of wall shells, enveloping the object whose coefficients are to be calculated, must also be created using a CSET operation.

July 27, 2007, 04:38

okay, I'll chk it...............thanks for tht

July 25, 2007, 00:38	how to get aero-coefficient cL,cD value in starCD	#1
ding Guest Posts: n/a	fernds, i have solving a problem of a UAV payload. i want to know how can i determine the value of cL & cD after the solution. in Engineering-data monitor we get the value of Tx,Ty,Tz etc....but can't we directly get cL,cD,cM...etc in post-processing??

July 25, 2007, 03:27	Re: how to get aero-coefficient cL,cD value in sta	#2
Peter Guest Posts: n/a	Two solutions to this one. 1. Call CD-adapco because they have received so many requests for this one down the years that some macros are available for this STAR-CD issue. 2. Migrate to STAR-CCM+ where forces, moments and the rest of it is automated and included as standard. Regards

July 25, 2007, 09:12	Re: how to get aero-coefficient cL,cD value in sta	#3
James Guest Posts: n/a	Have you tried Acoeff ?

July 26, 2007, 02:32	Re: how to get aero-coefficient cL,cD value in sta	#4
ding Guest Posts: n/a	wat is "Acoeff"??? whr can i find it?

July 26, 2007, 04:39	Re: how to get aero-coefficient cL,cD value in sta	#5
Airfoil Guest Posts: n/a	You can get it from user manual page 9-26. I paste the explanation over here. Calculating aerodynamic coefficients â€" command ACOEFF. This facility works in conjunction with values of total force components at the wall, loaded via the Wall Post Data dialog. A set of wall shells, enveloping the object whose coefficients are to be calculated, must also be created using a CSET operation.

July 27, 2007, 04:38	Re: how to get aero-coefficient cL,cD value in sta	#6
ding Guest Posts: n/a	okay, I'll chk it...............thanks for tht

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