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How can I extend the time range?

Posted 24.08.2012, 07:17 GMT-4 Studies & Solvers Version 4.2a 0 Replies

Li Wan
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I use PDE model to solve time dependent PNP equations coupled with N-S equation. Attached is my model. Please run study 1 and study 2 firstly. Study 1 is for stationary solutions to prepare initial values. Study 2 is for the solution without an external electric field. You can see in the "Global parameter", the value of "ele" is equal to 0, which means I switch off the electric field. After running the study 1 and study 2, then please change the value of "ele" to be "1" , meaning I switch on the electric filed. Last, please choose the solution of time 0.01 in study 2 as initial value for study 3. Finally, run study 3 to get the results I want.

Now my problem is if I extend the time range larger than the present values, the solutions are not converged, saying I change the time range of study 2 from (0, 0.001, 0.01) to (0, 0.1,10), or time range of study 3 from (0.01, 0.01, 0.08) to (0.01, 0.1, 10) or more. I have changed the Jacobian update on every iteration, but get no change to the situation. So, could you help me to treat this problem?Thanks!

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0 Replies Last Post 24.08.2012, 07:17 GMT-4
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Hello Li Wan

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