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Circular variable dependency
Posted 2017年8月15日 GMT-4 14:08 Interfacing, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Porous Media Flow, Studies & Solvers Version 5.3 0 Replies
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I have an issue in defining the boundary condition. This boundary condition depends on a variable. The amount of this variable depends on the amount of the boundary condition.
COMSOL gives the following error: "Circular variable dependency detected".
Here is more information:
I am simulating moisture and heat transfer in porous media. To calculate the sensible heat flux at the boundary, I need to know the amount of sensible heat flux first to obtain the stability correction factor (Monin_Obukhov's parameter), and then using that parameter to obtain the corrected sensible heat flux at the boundary.
here is what I need to do:
1 - assume a value for stability correction factor
2- calculate the sensible heat flux
3- update the stability correction factor
this iterative procedure continues until the solution for sensible heat flux converged.
Any idea that how I should implement this in COMSOL.
By the way, apparently there is a discussion in COMSOL (i.e., Solution Number: 1215), but I do not have access to the COMSOL support.
Thanks,
Hello Alireza Talebi
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