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Pipe Flow Heat Transfer Question
Posted 29 gen 2017, 17:28 GMT-5 Fluid & Heat, Heat Transfer & Phase Change Version 5.2 0 Replies
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I am trying to simulate the temperature drop in water flowing through an underground copper pipe. I have access to the COMSOL laminar flow module and the Heat transfer in fluids as well as the heat transfer in solids modules. I have read that you only need to use one of the heat transfer modules as long as you define the solid and non solid regions so I am using the solids module.
I am working in 2D asymmetrical mode. I have drawn three cylinders, one for the water (initially at 20 C), one for the copper pipe (initially at 5 C), and one for the surrounding soil (initially at 5 C).
I have been trying to set the inlet temperature of the tube to be a constant 20 C using a temperature boundary condition but I am getting strange results. I initially made my pipe length 1 meter long just to see if I could get the modules working without extended computation time. When I run my simulation to steady state the outlet of the pipe, 1 meter from the inlet, approaches 5 C. This seems physically impossible. I am wondering what mistakes I could be making.
Thank You,
David
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Hello David Stanley
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