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Forum: FLUENT

June 19, 2009, 16:28

Replies: 14

Low Drag coefficient! :(

Views: 5,853

Posted By mystic_cfd

did you include roughness on your sphere model? ...

did you include roughness on your sphere model?

according to my "very reliable" wiki page, for a smooth sphere we have:
Cd = 0.1

this equates to F = 0.11N if I use V=60m/s; d = 25.4mm; rho...

Forum: FLUENT

June 19, 2009, 16:04

Replies: 14

Low Drag coefficient! :(

Views: 5,853

Posted By mystic_cfd

You might have to trust your answer as being...

You might have to trust your answer as being correct. I had a look at this page:
http://en.wikipedia.org/wiki/Drag_coefficient
(don't have textbook at hand for the moment).

they list many drag...

Forum: FLUENT

June 18, 2009, 16:49

Replies: 14

Low Drag coefficient! :(

Views: 5,853

Posted By mystic_cfd

some thoughts to ponder... drag on an axial...

some thoughts to ponder...

drag on an axial cylinder is Cd ~1 for wide range of Re (check Hoerner's book on drag, or White, Introduction to Fluid Dynamics). Elipsoid can be low ~ 0.2, but you are...

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