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Entering 'h' matrix of neumann boundary condition in Comsol v4.3a

Posted 8 juin 2014, 03:01 UTC−4 Version 4.3a 2 Replies

Gollakota Anjani Ravikiran
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Hello,
I am trying to implement Buckley Leverett Problem using coefficient form PDE.
The comsol multiphysics guide specifies the neumann boundary condition as
n.( cuu + alpha u - gamma) +  qu= g- hT*mu
but in the actual interface the term hT * mu is missing.
How do I enter the h matrix in the simulation (also I am using two dependent variables, so h is a 2x2 matrix) ?
I'll be really grateful if somebody helps me out with this problem asap.
Thank You.

2 Replies Last Post 1 juil. 2016, 01:31 UTC−4
COMSOL Moderator

Hello Gollakota Anjani Ravikiran

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Giulia M.
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Posted: 9 years ago 10 mars 2016, 04:09 UTC−5
In comsol 5.2
Physics --> flux source --> h should be the same as q matrix
In comsol 5.2 Physics --> flux source --> h should be the same as q matrix
John Sam
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Posted: 8 years ago 1 juil. 2016, 01:31 UTC−4

Hello,
I am trying to implement Buckley Leverett Problem using coefficient form PDE.
The comsol multiphysics guide specifies the neumann boundary condition as
n.( cuu + alpha u - gamma) +  qu= g- hT*mu
but in the actual interface the term hT * mu is missing.
How do I enter the h matrix in the simulation (also I am using two dependent variables, so h is a 2x2 matrix) ?
I'll be really grateful if somebody helps me out with this problem asap.
Thank You.



Hi, I am also trying to solve Buckley Leverett Problem and facing the same problem of entering h matrix as described above. Did any one get it? I tried the suggestion by Gulia but without success. It will be helpful if somebody can give me some suggestion.
[QUOTE] Hello, I am trying to implement Buckley Leverett Problem using coefficient form PDE. The comsol multiphysics guide specifies the neumann boundary condition as n.( cuu + alpha u - gamma) +  qu= g- hT*mu but in the actual interface the term hT * mu is missing. How do I enter the h matrix in the simulation (also I am using two dependent variables, so h is a 2x2 matrix) ? I'll be really grateful if somebody helps me out with this problem asap. Thank You.  [/QUOTE] Hi, I am also trying to solve Buckley Leverett Problem and facing the same problem of entering h matrix as described above. Did any one get it? I tried the suggestion by Gulia but without success. It will be helpful if somebody can give me some suggestion.

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