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-   -   How find Drag coefficient of a body with ANSYS CFX (http://www.cfd-online.com/Forums/cfx/26453-how-find-drag-coefficient-body-ansys-cfx.html)

Jhonathan October 1, 2008 18:03

How find Drag coefficient of a body with ANSYS CFX
 
Hi.

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

Thanks.

Miguel October 1, 2008 21:42

Re: How find Drag coefficient of a body with ANSYS
 
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.

Glenn Horrocks October 2, 2008 18:07

Re: How find Drag coefficient of a body with ANSYS
 
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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