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Calculate time derivative of a variable that is stored by the Previous Solution

Posted Sep 8, 2019, 12:20 p.m. EDT COMSOL Server, Studies & Solvers, Equation-Based Modeling 1 Reply

Yu Zhang
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Dear all:

I read and followed the BLOG"Using the Previous Solution Operator in Transient Modeling". However, I encountered an issue about this approach when I was trying to calculate the time derivative of the maximum temperature. COMSOL reminded me failed to find consistent initial values. Could you please provide me a method to calculate the rate of the temperature?

Thank you for your help and time.

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Yu Zhang
1 Reply Last Post Sep 13, 2019, 5:31 a.m. EDT
Daniel Eriksson
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Posted: 5 years ago Sep 13, 2019, 5:31 a.m. EDT

I have the very same problem. I cannot include a time deriviative of the variable that I use in the previous solution operator in my model without getting the error message: "Failed to find consistent initial values".

I have the very same problem. I cannot include a time deriviative of the variable that I use in the previous solution operator in my model without getting the error message: "Failed to find consistent initial values".

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