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Under what condition does flow separation take place?

Under what condition does flow separation take place? Correct Answer When dp/dx > 0 

Concept:

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Pressure gradient in the direction of flow is constant and negative.

Flow separation occurs when the pressure gradient is positive and the velocity gradient is negative.

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A favourable pressure gradient is one in which the pressure decreases in the flow direction (i.e., dp/dx < 0)

On the other hand, an adverse pressure gradient is one in which pressure increases in the flow direction (i.e., dp/dx > 0)

 

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