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Which of the following gives the viscosity of flow?(a) Mach Number(b) Knudsen Number(c) Specific heat ratio(d) Reynolds NumberThis question was posed to me in class test.Question is taken from Flight Dynamics topic in division Flight Dynamics and Control of Aircraft Maintenance

Answer»

Correct CHOICE is (d) Reynolds Number

Best explanation: Viscosity of the flow is GIVEN by Reynolds Number. It is REPRESENTED by Re. Mach number indicates the COMPRESSIBILITY of flow and Knudsen number indicates rarefaction of the flow.



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