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Average Velocity at Inlet/Outlet from derived values (after simulation) does not match the input average velocity
Posted 24.09.2018, 10:02 GMT-4 Fluid & Heat, Computational Fluid Dynamics (CFD), Heat Transfer Version 5.3a 2 Replies
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Hello,
So, I am simulating a U-tube heat exchanger. I have an inlet and outlet defined for my simulation, and I input a .11 m/s normal inflow velocity. However, when I take the average velocity at the inlet or get the volumetric flow and divide by the surface area of the inlet, I get a value of .08m/s for the average velocity after the simulation runs.
Is this normal, or am I doing something wrong? My simulation file is too big to attach here even after deleting the results/study/mesh. Please let me know if you need any additional information.
Thank you very much for your time! -Dan
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Please provide how you are performing the averaging.
-------------------James D. Freels, Ph.D., P.E.
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Please provide how you are performing the averaging.
boundary probe? i meet with a similar problem... mass is not balanced between inlets and outlets... i don't know why