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System matrix is zero

Posted Jun 30, 2016, 10:48 a.m. EDT Heat Transfer & Phase Change, Studies & Solvers Version 4.4 0 Replies

Marine Gouret
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Hi,

I have some problem with my model on COMSOL 4.4. I use heat transfer in solids and non-isothermal pipe flow. And I have this message when I compute after about 20 minutes:

Failed to find consistent initial values.
Segregated group 4
System matrix is zero.
Last time step is not converged.

I do some simulation and I have this message all the time. Segregated group 4 refers to the pressure or to the tangential velocity (depends of the case).

If somebody can help me it will be great,
Thank you,

Marine
0 Replies Last Post Jun 30, 2016, 10:48 a.m. EDT
COMSOL Moderator

Hello Marine Gouret

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