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How to model or/and increase entrance loss in perforated pipe ?

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Old   April 17, 2014, 16:35
Default How to model or/and increase entrance loss in perforated pipe ?
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Tanjina Afrin
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Hello everyone,

I am modelling a perforated pipe surrounded by aggregate. When I measure the pressure head at the bottom of pipe, I got higher value than that of experimental value. I tried with various hydraulic conductivity thinking that I am not modeling the loss in aggregate properly. But I found that sensitivity of K is not that much.

So I am assuming that I may not model properly the entrance loss. Because when pipe is full flowing only that time I got this difference. When pipe is not full flowing, I got very good result.

I hope someone can give any insight about it.

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entrance loss

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