- #1
Brainface
- 2
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- TL;DR Summary
- Pipe system with unknown geometry. Given pressure drop at a specific flow rate with one fluid. What is the pressure drop using a different fluid?
Hello, everyone,
I am currently working on the following (real) problem, where I am not getting anywhere.
It would be super nice if you could have a look at this. Thank you very much :-).
I have a pipe system (Black Box) of which I only know the following things:
At a set flow rate with a given fluid at room temperature I have a pressure loss of x bar after flowing through the system. The exact geometry or internal structure of the pipe system is completely unknown.
Question: How big would the pressure loss be if I took another (different density/viscosity) fluid instead of the given fluid?
Using the formulas for wall friction losses and losses due to bends, valves etc., I have been able to construct the following ratio.
However, I can't get any further now, because I only know the total pressure loss with Fluid 1, but not the shares of the wall friction and the friction caused by bends, valves...
Furthermore: I have assumed a laminar flow in my equation. However, since I do not know the pipe diameter, this may not apply.
Is there a way to solve that problem? Can I use these equations in the first place or are my thoughts the wrong approach?
Thanks a lot.
Best wishes,
Ben
I am currently working on the following (real) problem, where I am not getting anywhere.
It would be super nice if you could have a look at this. Thank you very much :-).
I have a pipe system (Black Box) of which I only know the following things:
At a set flow rate with a given fluid at room temperature I have a pressure loss of x bar after flowing through the system. The exact geometry or internal structure of the pipe system is completely unknown.
Question: How big would the pressure loss be if I took another (different density/viscosity) fluid instead of the given fluid?
Using the formulas for wall friction losses and losses due to bends, valves etc., I have been able to construct the following ratio.
However, I can't get any further now, because I only know the total pressure loss with Fluid 1, but not the shares of the wall friction and the friction caused by bends, valves...
Furthermore: I have assumed a laminar flow in my equation. However, since I do not know the pipe diameter, this may not apply.
Is there a way to solve that problem? Can I use these equations in the first place or are my thoughts the wrong approach?
Thanks a lot.
Best wishes,
Ben