Question: Suppose that a sphere with a single stagnation hole is to be used as a velocimeter. The pressure at this hole is used to compute

Suppose that a sphere with a single stagnation hole is to be used as a velocimeter. The pressure at this hole is used to compute the stream velocity U, but there are errors if the stream is not perfectly aligned with the oncoming stream. Using in viscid incompressible theory, plot the % error in stream velocity as a function of misalignment angle φ. At what angle is the error 10%?

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