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circular variable dependency detected
Posted 16 set 2012, 12:09 GMT-4 Computational Fluid Dynamics (CFD) Version 4.3 0 Replies
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I have a problem here. I want to use COMSOL for one of my problems. In this model, I want to find the viscosity and velocity in a geometry which I have both soil and water. So I should use Darcy's law. In this law velocity is dependent to viscosity. However, the viscosity which I need to find at the end is also dependent to Darcy's law velocity. Hence my fluid is non-Newtonian fluid.
When I add Darcy's law to my physics. It asked for fluid and matrix properties. For matrix properties I have no problems, but for fluid properties it asked for viscosity, which I should write in that spot a function of Darcy's law velocity ( f(darcy's law velocity) ). When I run this model the error is : ''circular variable dependency detected'. So I used the iterative solver instead of direct one. Still the same error. Can anyone please help me here. Can COMSOL solve this problem?
Thanks,
Negin
Hello Negin Kananizadeh
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