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About conservative flux convection coefficient

Posted 29 juil. 2015, 13:50 UTC−4 Low-Frequency Electromagnetics, Microfluidics, Materials, Studies & Solvers Version 4.4 0 Replies

Jianyuf Miao
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hi everyone, im doing the simulation for the partial discharge. i keep encountering the problem when set the conservative flux convection coefficient in the coefficient form PDE model. the enclosed file shows the equation im trying to built and the comsol model.
i set 3 convection-diffusion equation mode, and i found it is the conservative flux convection coefficient makes modelling wrong. the error shows:
Repeated error test failures. May have reached a singularity.
Time : 1.225672249096233e-008
Last time step is not converged.
- Feature: Time-Dependent Solver 1 (sol1/t1)
if i change this coefficent as constant say: 1,2,3,4. its ok. but if i set any other parameter related to t, it will be error. but in mye case, i need to set the parameter related to electric field, which change with t all the time. so i have no idea how to set these equation, anyone can help me?
0 Replies Last Post 29 juil. 2015, 13:50 UTC−4
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Hello Jianyuf Miao

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