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I have a question, it is related to flows between two resorvoirs where I need to calculate the discharge between two pipes, with different pipe diameters.

The problem I have come across is where there is an expansion in the pipe size from 250mm diameter to 300mm, the formula states that I need to use is (V1 - V2) squared does any one know what this means.

I am certain its velocity in pipe 1 minus pipe two but how to I calculate this?

Anyone?

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# Calculate the discharge between two pipes

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