I have a small manifold where it is has 5 ports. I attach the water inlet in the middle so there are two outlets on the left and right of the inlet. These outlets are connected to tubes of equal lengths. I fully saturate the tubes and the manifold to get drips going on from the outlets. The drips stay consistent at larger flow rates but if I slow down the flow rate, all of a sudden the water in one/some of the outlet tubes suck back the water. Why is that?
In: Engineering
The wonderful, crazy, amazing, world of fluid mechanics! Fluid flows are NOT linear, they are NOT scalable, they are sensitive to flow rates, temperature, and pressure.
The best way to answer your question however is just to show you the underlying mathematical insanity involved:
[https://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations](https://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations)
What I expect you to take away from that isn’t a solution to your problem, but rather to explain why you have a super complex problem on your hands.
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