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Old   February 26, 2010, 05:31
Default Question on the calculation of lift coefficient
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mbt
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Hi all. The lift coefficient (also drag coefficient) is defined in the form of $C_L=\dfrac{F}{0.5\rho U^2A}$. And my question is in the post-processing step to calculate these coefficients, $A$ should be the sum of the areas of all mesh interfaces related to viscous wall, or it is a pre-defined valued given by the experiments. Many thanks.
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Old   February 26, 2010, 12:33
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f-w
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It's a defined reference area, depends on the experiment, but there are some common ones (like projected wing area). What you described is wetted area, which is also used at times.
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Old   February 27, 2010, 08:51
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Many thanks for your reply. I found that in some test cases $A$ is provided as reference value, maybe some type of projected area.
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