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-   -   to find drag coefficient of an ogival body (http://www.cfd-online.com/Forums/fluent/32903-find-drag-coefficient-ogival-body.html)

ace January 26, 2004 10:39

to find drag coefficient of an ogival body
 
Hi ! I want to find the drag coeff of an ogival shape. I have made the grid in fluent with press inlet boundary condition far ahead of the ogival body and press outlet at the end of 2D ogive. The mach # is 0.6 in standard atmosphere, the solution doesn't converge after a lot of iterations. i have changed the press inlet condition to press far field but the problem remains there. the shape of the domain is just like the alphabet 'D' with ogival shape attached to outlet boundary from behind.

If I give supersonic M# the solution is fine, I see perhaps press outlet b.c is creating problem....what pressure should I give at press outlet as i see that this is the only b.c condition for outlet available for compressible flows


ace January 26, 2004 23:04

To estimate drag coefficient of an ogival body
 
Hi! its urgent...can someone help

ace January 27, 2004 11:14

Re: To estimate drag coefficient of an ogival body
 
Hi All

Any ideas if std press is given at press inlet or press far field ahead of the body , what press to give at press outlet attached to the rear of the body for compressible flows.......


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