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How to make the solver converge?

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Dear Community,

I am trying to simulate a MESFET in COMSOL 5.3a. But when studying the drain current - voltage characteristics, the range of my Vg and Vd influences much. It doesn't converge all the time. The error is : Failed to find a solution for all parameters, even when using the minimum parameter step. No convergence, even when using the minimum damping factor. Returned solution is not converged. Not all parameter steps returned.

I tried to decrease the minimum damping factor, like to 1e-10 and that doesn't work Nor increasing the number of iterations. I also tried other solvers but it still doesn't converge.

Anyone knows how to solve this? Thank you very much!

Best regards, Feng Wang


0 Replies Last Post 2018年8月7日 GMT-4 10:54
COMSOL Moderator

Hello Feng Wang

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