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Saving only few variables/expression values as per solver time steps in transient runs
Posted Apr 22, 2010, 9:10 p.m. EDT 2 Replies
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Hi Everybody,
I am solving a transient analysis. The time step taken by solver is very small as compared to time step I specify in the time stepping option.
If I sample the variables as per solver time step, the solution is terminated giving the insufficient memory error. Is there any way to save only few selected time dependent variables/expression values as per solver time steps and remaining as per specified time steps?
Please share your expertise.
Thanks in advance,
Rakesh
I am solving a transient analysis. The time step taken by solver is very small as compared to time step I specify in the time stepping option.
If I sample the variables as per solver time step, the solution is terminated giving the insufficient memory error. Is there any way to save only few selected time dependent variables/expression values as per solver time steps and remaining as per specified time steps?
Please share your expertise.
Thanks in advance,
Rakesh
2 Replies Last Post Apr 23, 2010, 8:20 a.m. EDT
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Posted:
1 decade ago
or you can try: solver parameter -> advanced ->store solution on file
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Posted:
1 decade ago
Hi
Storeing the solution would (normally) free some ram but does not change the number of (internal) steps
I would suggest to try to learn how to use "Solver Parameters - Time stepping tab" "Time steps taken by solver" the default "free" is sometimes too free, try an "intermediate", or a "strict "= only youre time steps.
but do not forget that COMSOL is also tracking gradients/slopes, there are a couple of pages to read in the doc concerning this.
I agree there are very many pages to read in the doc (if you go from a-z), but by taking a few chapters at a time when you encounter issues like this, makes it farmore digest. I use an indexed search to identify in which files I find what.
have fun Comsoling
Ivar
Storeing the solution would (normally) free some ram but does not change the number of (internal) steps
I would suggest to try to learn how to use "Solver Parameters - Time stepping tab" "Time steps taken by solver" the default "free" is sometimes too free, try an "intermediate", or a "strict "= only youre time steps.
but do not forget that COMSOL is also tracking gradients/slopes, there are a couple of pages to read in the doc concerning this.
I agree there are very many pages to read in the doc (if you go from a-z), but by taking a few chapters at a time when you encounter issues like this, makes it farmore digest. I use an indexed search to identify in which files I find what.
have fun Comsoling
Ivar