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Polymer viscosity model about Cross-WLF eqaution

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Hello,

I have tried to analyze the filling pattern of polymers in injection molding process with COMSOL software.
And I tried to apply the shear viscosity of the polymer to the analysis using cross-WLF equation which usually used to express the behaviors.

However, I found out that the viscosity rapidly increased when the temperature of the polymer reached glass transition temperature.
With the increasing viscosity, the analysis was failed.

I need your help with the problem.
Please let me know how I can fix the problem without the fail message.

Best regards,



3 Replies Last Post 23.05.2014, 02:49 GMT-4

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Posted: 1 decade ago 21.05.2014, 11:27 GMT-4
What do you mean by 'the analysis was failed'? What error do you get?
What do you mean by 'the analysis was failed'? What error do you get?

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Posted: 1 decade ago 22.05.2014, 22:11 GMT-4
The error message is

"The following feature has encountered a problem: Nonlinear solver did not converge.
Last time step is not converged."

I don't know how can I do ....
The error message is "The following feature has encountered a problem: Nonlinear solver did not converge. Last time step is not converged." I don't know how can I do ....

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Posted: 1 decade ago 23.05.2014, 02:49 GMT-4
Maybe you should have a look at the phase change examples (heat transfer module), or have you already used that?
Maybe you should have a look at the phase change examples (heat transfer module), or have you already used that?

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