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I am trying to estimate the flow rate in a long pipe of rectangular cross section. The pipe is 100 m long and has twenty 180 degree turns. I have been able to calculate the pressure drip for a 100m straight pipe, but I have not been able to estimate the losses due to the turns. Is there a way to estimate these? I would appreciate any help.

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# Fluids: calculate pressure loss due to turns in pipe flow

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