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coef of drag and Re

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Old   November 2, 2001, 16:49
Default coef of drag and Re
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ucsd
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I am trying to work through the derivation of why Cd is proportional to 1/Re at low Re, directly related....why Cd is constant with respect to Re at high Re. Any help would be greatly appreciated.
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Old   November 3, 2001, 03:45
Default Re: coef of drag and Re
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Jongdae Kim
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How to define your Re. number?

Re=U*d/nu ?

In your case, what is d ? Are you studying on the bluff body aerodynamics? Depends on the body shape (geometry), the values of coefficients are different.

Now, I almost finished calculating Reynolds number dependency analysis of two-dimensional square cylinder using large eddy simulation.

Reynolds number range is from 20 to 22000 and the aerodynamic coefficients are Cd_mean, Cl_mean, Cd_rms, Cl_rms, Strouhal Number. Pressure on cylinder and velocity fields around cylinder are also analyzed.

If you have interesting on this fields, please send e-mail.
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