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Example of protein adsorption

Posted Apr 21, 2010, 5:07 a.m. EDT 1 Reply

Lasse Murtomäki
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Hi

I am studying the protein adsorption example given in Reaction Engineering Lab. I follow punctually the instructions, but stage 2, exporting to Multiphysics does not work. Solving the system returns the following message:


"Error:
Failed to find consistent initial values.
Singular_matrix

There are 55 void equations (empty rows in matrix) for the variable c_Aa
at coordinates: (0), (6.00166e-009), (1.20033e-008), (1.99122e-008), (2.78211e-008), ...
There are 55 void equations (empty rows in matrix) for the variable c_Ba
at coordinates: (0), (6.00166e-009), (1.20033e-008), (1.99122e-008), (2.78211e-008), ...

Last time step is not converged."

Solution stops at Time=0.

I wonder what I should do in the Subdomain setting to the 'unnamed1' group, which appears with the group 'protein' which exporting created.

Thanks
Lasse Murtomäki
University of Helsinki
1 Reply Last Post Apr 21, 2010, 7:01 a.m. EDT
Lasse Murtomäki
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Posted: 1 decade ago Apr 21, 2010, 7:01 a.m. EDT
It may have been due to my units: none. Hence, I had simulated in an dimensionless form previously. But I am not sute that that was the reason...
It may have been due to my units: none. Hence, I had simulated in an dimensionless form previously. But I am not sute that that was the reason...

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