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Micro Pin-Fin Heat Exchanger
Posted 05.04.2010, 18:10 GMT-4 0 Replies
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I have a model of a heat exchanger which uses Convection-Conduction and Weakly Compressible Navier Stokes of Chemical Engineering Module. The fluid flow is in single phase (liquid) and laminar. I have a very simple but not yet solved problem.
In this stationary problem a constant heat flux is applied to certain boundaries. At the same time, a fluid flow is set between an inlet and outlet. I have entered the total amount of power to be deliver in Constants and converted it in to heat flux by dividing it to total heated area. However, I check the conservation of energy to validate my simulation.
At the inlet and outlet, I integrate u*rho_chns*C_chcc*T. The difference between these integrations should be the power I am providing by heat flux boundary conditions but the results never come up so.
I think I tried everything (mesh quality, weak constraints, cross-wind diffusion settings in stabilisation tab of chns and chcc modules, solvers). What are the other key points that I should reconsider to have an accurate solution?
I am also attaching the model file. I want to thank in advance to all of you for paying attention.
Attachments:
Hello Mustafa Koz
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