So flow rate is calculated using only the parallel velocity to the area vector. Why is this? How can I mathematically prove this? Namely, how do I prove any perpendicular component of the velocity vector is not contributing to any volume output? I know this is the result of the dot product; I want to know why the dot product is valid reasoning for this scenario.(adsbygoogle = window.adsbygoogle || []).push({});

thanks.

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# Flow rate is calculated using only the parallel velocity

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