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Drag coefficient for rectangular

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Old   April 27, 2010, 02:34
Default Drag coefficient for rectangular
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Vahid Memar
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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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Old   April 27, 2010, 13:15
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Jouke de Baar
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Is that at the same Reynold's number? The cd will depend on Re. What is your Re?
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Old   April 27, 2010, 13:33
Default reynolds number
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Vahid Memar
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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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Old   April 27, 2010, 13:47
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Jouke de Baar
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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 13:49. Reason: wrong url
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Old   April 27, 2010, 23:54
Default drag of square
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Vahid Memar
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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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