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Comsol beginner needs help !

Posted Jun 24, 2011, 8:25 a.m. EDT Chemical Reaction Engineering, Studies & Solvers Version 3.5a 0 Replies

Joaquin
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Hi everybody,

I'm just having a little trouble with Darcy's Law, here is what I got from the log:

Error:
Time 0:
Error in residual computation.
Sqrt_of_negative
Function: sqrt
Failed_to_evaluate_variable
Variable: U_esst, Defined_as: sqrt(((u_esst)^2+(v_esst)^2))

What could possibly be responsible for such a thing ?

Thanks ;-)
0 Replies Last Post Jun 24, 2011, 8:25 a.m. EDT
COMSOL Moderator

Hello Joaquin

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