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What is D’Alembert’s Paradox?

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in Fluid Mechanics by (118k points)
What is D’Alembert’s Paradox?

(a) Resistance= 0

(b) Drag force= 0

(c) Temperature = 0

(d) Pressure gradient= 0

This question was posed to me in my homework.

The above asked question is from Separation of Boundary Layer topic in portion Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

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Correct answer is (b) Drag force= 0

For explanation: D’Alembert’s Paradox states that for an incompressible and inviscid flow potential flow, the drag force is equal to zero. The fluid is moving at a constant velocity with respect to its relative fluid.

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