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Comsol 4: using simulation results as an initial condition to next simulation

Posted 6 juin 2010, 22:05 UTC−4 Version 4.0, Version 4.0a 4 Replies

Rakesh Dhote
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Hi,

I am finding difficulty in using the simulation results as an initial condition to the next simulation.
Does anyone know, how to do it?

It was bit easy to do it in Comsol 3.5a.

Thanks,
Rakesh
4 Replies Last Post 2 déc. 2011, 04:31 UTC−5
Joseph Maduzia
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Posted: 2 decades ago 8 juin 2010, 13:55 UTC−4
I am very new to Comsol but I would also like to know more about this.

Thank You
I am very new to Comsol but I would also like to know more about this. Thank You
Danial Tz
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Posted: 2 decades ago 8 juin 2010, 17:26 UTC−4
What I do is to copy my results (right click) and then use the copied one as the initial condition (right click on variables).

In my case it crashed when I did it initially. Support told me to add:
(bash) export MALLOC_CHECK_=0
(tcsh) setenv MALLOC_CHECK_ 0

hope it helps.
What I do is to copy my results (right click) and then use the copied one as the initial condition (right click on variables). In my case it crashed when I did it initially. Support told me to add: (bash) export MALLOC_CHECK_=0 (tcsh) setenv MALLOC_CHECK_ 0 hope it helps.
Benjamin Moroney
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Posted: 1 decade ago 20 déc. 2010, 18:54 UTC−5
I can only speak for having done so with MATLAB, but what I did was create an m-file and copy the block of code that sets up the solution, and enforce a "sol" initial condition.

After setting up your model,

% Run winding pulse
model.sol('sol3').runAll;

% Redefine system for diffusion
model.physics('c').feature('cfeq1').set('a', '0');
model.physics('c').feature('cfeq1').set('c', {'Dw' '0' '0' 'Dw'});
model.study('std1').feature('time1').set('tlist', '0, 1.5');
model.sol('sol3').feature('t1').set('tlist', '0, 1.5');
model.sol('sol3').feature('t1').set('timemethod', 'bdf');
model.sol('sol3').feature('t1').set('tstepsbdf', 'free');
model.sol('sol3').feature('v1').set('initmethod', 'sol');
model.sol('sol3').feature('v1').set('initsol', 'sol3');

% Run diffusion
model.sol('sol3').runAll;

The line model.sol('sol3').feature('v1').set('initmethod', 'sol'); is the important line.
I can only speak for having done so with MATLAB, but what I did was create an m-file and copy the block of code that sets up the solution, and enforce a "sol" initial condition. After setting up your model, % Run winding pulse model.sol('sol3').runAll; % Redefine system for diffusion model.physics('c').feature('cfeq1').set('a', '0'); model.physics('c').feature('cfeq1').set('c', {'Dw' '0' '0' 'Dw'}); model.study('std1').feature('time1').set('tlist', '0, 1.5'); model.sol('sol3').feature('t1').set('tlist', '0, 1.5'); model.sol('sol3').feature('t1').set('timemethod', 'bdf'); model.sol('sol3').feature('t1').set('tstepsbdf', 'free'); model.sol('sol3').feature('v1').set('initmethod', 'sol'); model.sol('sol3').feature('v1').set('initsol', 'sol3'); % Run diffusion model.sol('sol3').runAll; The line model.sol('sol3').feature('v1').set('initmethod', 'sol'); is the important line.
Gyeorye Lee
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Posted: 1 decade ago 2 déc. 2011, 04:31 UTC−5
What is the 'initmethod' ??

I attatched these sentences

model.sol('sol1').feature('o1').set('initmethod', 'sol');
model.sol('sol1').feature('o1').set('initsol', 'sol1);

but the below error occured

??? Java exception occurred:
Exception:
com.comsol.util.exceptions.FlException: Unknown property
Messages:
Unknown property
- Property: initmethod
What is the 'initmethod' ?? I attatched these sentences model.sol('sol1').feature('o1').set('initmethod', 'sol'); model.sol('sol1').feature('o1').set('initsol', 'sol1); but the below error occured ??? Java exception occurred: Exception: com.comsol.util.exceptions.FlException: Unknown property Messages: Unknown property - Property: initmethod

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