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Old Feb 27th 2016, 09:17 PM   #1
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pressure in inclined pipe

why the formula of V_avg is not ΔP, which is P1- P2 ? , but ΔP - ρgLsin theta ? is it wrong ?
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Old Feb 27th 2016, 11:10 PM   #2
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in this case you are looking for the contribution of the fluid weight to the pressure in the flow direction.
you must concider the pipe angle so the gravitational pressure is P = -ρgLsin theta
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