How find Drag coefficient of a body with ANSYS CFX

October 1, 2008, 19:03

Hi.

How can i find the drag coefficient of a body with ANSYS CFX?

Thanks.

October 1, 2008, 22:42

You can integrate pressure field and shear stress field over the body surface (CFX-POST). If the integration is in the parallel direction to the flow you got drag force. If the integration is in the normal direction, instead, you got lift force.

October 2, 2008, 19:07

Hi,

A better way is to use the force_x/y/z functions as that calculates the total force on the surface. These can be called as a CEL expression as the simulation progresses or done in post-processing in CFX-Post.

Glenn Horrocks

October 1, 2008, 19:03	How find Drag coefficient of a body with ANSYS CFX	#1
Jhonathan Guest Posts: n/a	Hi. How can i find the drag coefficient of a body with ANSYS CFX? Thanks.

October 1, 2008, 22:42	Re: How find Drag coefficient of a body with ANSYS	#2
Miguel Guest Posts: n/a	You can integrate pressure field and shear stress field over the body surface (CFX-POST). If the integration is in the parallel direction to the flow you got drag force. If the integration is in the normal direction, instead, you got lift force.

October 2, 2008, 19:07	Re: How find Drag coefficient of a body with ANSYS	#3
Glenn Horrocks Guest Posts: n/a	Hi, A better way is to use the force_x/y/z functions as that calculates the total force on the surface. These can be called as a CEL expression as the simulation progresses or done in post-processing in CFX-Post. Glenn Horrocks

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