Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Livelink update values after Comsol iteration
Posted 10 juil. 2017, 12:30 UTC−4 1 Reply
Please login with a confirmed email address before reporting spam
Hi
I have seen a question that is repeated several times in the forum but has no clear answer to me.
So, using COMSOL through MATLAB script. After COMSOL has finished the calculation you might change some of the values of the solution applying either other solver or some script with MATLAB, and later you might want to update this new values into COMSOL, to run again the simulation.
So at each time loop being C your unknown:
1) C(t) --> Comsol --> C'(t+dt) --> Other programs --> C(t+dt)
2) C(t+dt) --> Comsol --> C'(t+2*dt) --> Other programs --> C(t+2*dt)
3)
.
.
.
n_iteration
So I wonder, what is the best way to update initial values in a COMSOL calculation through the livelink
Thanks
I have seen a question that is repeated several times in the forum but has no clear answer to me.
So, using COMSOL through MATLAB script. After COMSOL has finished the calculation you might change some of the values of the solution applying either other solver or some script with MATLAB, and later you might want to update this new values into COMSOL, to run again the simulation.
So at each time loop being C your unknown:
1) C(t) --> Comsol --> C'(t+dt) --> Other programs --> C(t+dt)
2) C(t+dt) --> Comsol --> C'(t+2*dt) --> Other programs --> C(t+2*dt)
3)
.
.
.
n_iteration
So I wonder, what is the best way to update initial values in a COMSOL calculation through the livelink
Thanks
1 Reply Last Post 11 juil. 2017, 05:20 UTC−4
Please login with a confirmed email address before reporting spam
Posted:
7 years ago
Hi
There are several options
If you just wish to define initial values as scalars then simply include these values as parameters in your model. Use
model.param.set
to set the values in Comsol using the API.
If you have a set of values that are defined as a field (i.e. they vary over x, y and z) you can define an interpolation function in your model. Use the API to update the data values that are used by the interpolation function.
For advanced users there is an option of defining values as a field directly into the solution vector. This requires some tweaking of the model in order to make it work, but gives maximum control of exactly what data Comsol is using.
--
Lars Gregersen
Comsol Denmark
There are several options
If you just wish to define initial values as scalars then simply include these values as parameters in your model. Use
model.param.set
to set the values in Comsol using the API.
If you have a set of values that are defined as a field (i.e. they vary over x, y and z) you can define an interpolation function in your model. Use the API to update the data values that are used by the interpolation function.
For advanced users there is an option of defining values as a field directly into the solution vector. This requires some tweaking of the model in order to make it work, but gives maximum control of exactly what data Comsol is using.
--
Lars Gregersen
Comsol Denmark