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time dependent solver vs. time step vs. initial step
Posted Jul 26, 2012, 11:40 a.m. EDT Studies & Solvers Version 4.3 0 Replies
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For this time dependent simulation, I calculate initial values & BCs from a stationary simulation, I need to run for range(0,2592000,946080000).
It run infinity without returning any results. So, I tried one of these accordingly:
1. range(0,31536000,946080000)
2. range(0,315360000,946080000)
3. run 1. and 2. with initial time step: 0.000864
4. run 1. and 2. with relative tolerence: 0.1 and absolute tolerence: 0.01
5. use 'physics-controlled mesh' instead
6. at solver configuration\solver\time-dependent solver\segregated\segregated step 1 & 2, use linear solver:iterative
7. uncheck 'update scaled absolute tolerence'
Actually, at 'solver configuration', when I 'compute to selected' at 'dependent variables', it returns time = 0 (temperature, pressure etc), but once I start 'time dependent solver', it runs infinity again.
I attached the time dependent model. Looking forward to hearing your expertise. Many thanks!
ps: I rebuilt this model from scratch on COMSOL 4.3
regards
Liwah
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Hello LiWah Wong
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