The co-efficient of drag and lift for an incompressible fluid depends on the_________________?
Correct answer: A. Reynolds number
- A. Reynolds number
- B. Froude number
- C. Mach number
- D. All A., B. and C.
Explanation
For an incompressible fluid around a body, drag and lift coefficients are commonly correlated with Reynolds number, which compares inertial and viscous effects. Mach number is mainly relevant to compressibility, while Froude number applies when gravity or a free surface is important.
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