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ERROR: FAILED TO EVALUATE VARIABLE JACOBIAN, Variable: K_corn
Posted 20 déc. 2016, 08:53 UTC−5 Version 4.4 0 Replies
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I am getting the following error:
Failed to evaluate variable Jacobian.
- Variable: K_corn
- Geometry: 1
- Domain: 1 2
- Feature: Time-Dependent Solver 1 (sol2/t1)
My model: Porous media flow process.
Porous media: Corn.
Study: Time dependent
Analysis:
If the gravity effects are neglected and defining a permeability coefficient as K=ko/mu, Darcy’s equation can be written by v = -K . grad P, where v is the superficial velocity. If this relation is substituted in continuity equation, one has d(porosity . rho_air)/dt = grad(rho_air . K_corn . grad P).
where : K_corn = A . abs( grad P) ^(B-1) ,
grad P = Px^2+Py^2
A = 3.294 and B = 0.680
Do you know how to fix this problem?
Thanks in advance for the comments.
Hello José Leôncio Fonseca Souza
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