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April 27, 2010, 03:34 |
Drag coefficient for rectangular
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#1 |
New Member
Vahid Memar
Join Date: Dec 2009
Posts: 15
Rep Power: 16 |
hi
I calculate rectangular drag coefficient in fluent (2D analysis) and the result was 0.69 but in some table it is 2.05 (2D shape) . in any body here that say me what is the mistake ? |
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April 27, 2010, 14:15 |
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#2 |
Senior Member
Jouke de Baar
Join Date: Oct 2009
Posts: 127
Rep Power: 16 |
Is that at the same Reynold's number? The cd will depend on Re. What is your Re?
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April 27, 2010, 14:33 |
reynolds number
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#3 |
New Member
Vahid Memar
Join Date: Dec 2009
Posts: 15
Rep Power: 16 |
I do not have Reynolds number for handbook, but I have a question:
Is the Reynolds number make high difference like this for drag coefficient ? do you have another handbook for drag coefficient with Reynolds number ? |
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April 27, 2010, 14:47 |
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#4 |
Senior Member
Jouke de Baar
Join Date: Oct 2009
Posts: 127
Rep Power: 16 |
I'm afraid it is likely to make a big difference. For example refer to:
http://www.aerospaceweb.org/question...cs/q0231.shtml The cd of 2.05 should be correct for roughly Re = 1e4 to 1e6. Last edited by jack1980; April 27, 2010 at 14:49. Reason: wrong url |
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April 28, 2010, 00:54 |
drag of square
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#5 |
New Member
Vahid Memar
Join Date: Dec 2009
Posts: 15
Rep Power: 16 |
dear jack
after modify the mistake in my modeling, I approach to 2.95 this answer was better than last. I will check the other Reynolds and I can find the reason , I will post that. thanks. v.Memar |
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