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Drag coefficient is a function of _________

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in Fluid Mechanics by (118k points)
Drag coefficient is a function of _________

(a) Mach number

(b) Froude’s number

(c) Laminar flow

(d) Reynolds number

This question was posed to me in exam.

Asked question is from Drag on a Sphere topic in section Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

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Best answer
The correct option is (a) Mach number

Easy explanation: Drag coefficient is a function of Mach number. In fluid dynamics, the drag coefficient has no dimensions. It is a dimensionless quantity. Drag coefficient is used to quantify the resistance of an object in a fluid environment.

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