Selecting Wall Cells for Drag Force

Mr. Javidan Ahmad

I am currently investigating the aerodynamics of a motorcycle. The Geometry was created in Pro-Engineer and using Pro-Am manipulation, resulted in obtaining a domain with a hollow centre - where the hollow centre represents the wall of the bike.

However, in order to obtain the Drag force on the motorcycle i am required to select the surface cells which are on the motorcycle.

Currently, using the typical procedures (selcting cells, zones, based on edges etc) it is too time consuming and cumbersome to select the cells as a separate wall boundary.

It is required to select the wall surfaces of the motorcycle as a separate wall boundary as the default wall boundary (boundary region 0 - zero) does not allow the selection of forces in the monitor boundary behaviour menu (Analysis Controls>output controls>monitor engineering b>monitor boundary behaviour)

If anyone can advise me on what steps i can take to select the cells i require or any other method of working out the drag i would extremely appreciative.

Kind regards, Mr.Javidan Ahmad.