How to measure the pressure drop across pipes and bends?

Hi, i am currently trying to model a simple structure regarding measurements of the pressure drops across a simple fluid circuit. It consists of pipes and 4 particular 90 degrees bends. However when i tried to combine them together, the measurement read 0. Upon investigating, i realised that the pressure drop across the pipe cancels off the pressure drop across the 4 bends. In reality, it actually adds up instead. May i know how do i model it accurately in Simscape? Please refer to below for a simple schematic diagram.

[Sam Chak]

@Chin Siang Lim

I'm not a piping engineer. Since the formula to calculate the pressure loss is not provided, can you verify this one?

https://tecciness.com/hilfe/bogendruckverlust.php

[Chin Siang Lim]

Hi Sam Chak, appreciate the effort for addressing me. However, i am trying to find out how the simulink calculates the pressure drops across the pipes within matlab itself instead of the generic theoretical formula.

[Sam Chak]

Hi @Chin Siang Lim

The pressure loss due to curvature in the pipe bend is given in this link:

https://www.mathworks.com/help/physmod/hydro/ref/pipebend.html

If you observe any discrepancy and suspect a bug, please write to the Mathworks Staff.

[Yifeng Tang]

Is it possible to share this simple model so we can reproduce the problem and look into it? What you described does sound very strange.