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Comsol with Matlab
Posted 1 mag 2011, 01:02 GMT-4 Interfacing, Materials, Parameters, Variables, & Functions, Results & Visualization, Studies & Solvers 3 Replies
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Hi,
I have a problem in linking a model on Comsol with some m-files in Matlab. I have made a model in Comsol and save it as mfile. I have also defined some points (PT1, PT2, ....) on the boundaries. Now, I would like to evaluate electric potential at these points and use them as a imput for other mfiles.
I do not know how I can use the electric potential at some specific points as outputs of my comsol model. How can I define following statement in the mfile of my comsol model:
[Voltage at PT1, Voltage at PT2, Voltage at PT3, .....]=comsol-model(PT1,PT2,PT3,....)
thank you in advance,
Saeid
3 Replies Last Post 9 mag 2011, 03:06 GMT-4
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Posted:
1 decade ago
Hi Saeid,
Try looking in the COMSOL LiveLink™ for MATLAB® User's Guide at the following commands to see if they do what you want:
1. mpheval
2. mphinterp
The first one pulls results at specified node points, the second one pulls results at arbitrary points.
This is the code I use for extracting the electric field at specified coordinates:
fieldMap(:,1:3) = coordinates;
[fieldMap(:,4),fieldMap(:,5),fieldMap(:,6)] = mphinterp(model, {'es.Ex','es.Ey','es.Ez'}, 'coord', coordinates.');
This comes from a function with is available on launchpad at bazaar.launchpad.net/~mattachu/modelrfq/trunk/view/head:/Matlab/ComsolInterface/getFieldMap.m
Hope it helps!
matt
Try looking in the COMSOL LiveLink™ for MATLAB® User's Guide at the following commands to see if they do what you want:
1. mpheval
2. mphinterp
The first one pulls results at specified node points, the second one pulls results at arbitrary points.
This is the code I use for extracting the electric field at specified coordinates:
fieldMap(:,1:3) = coordinates;
[fieldMap(:,4),fieldMap(:,5),fieldMap(:,6)] = mphinterp(model, {'es.Ex','es.Ey','es.Ez'}, 'coord', coordinates.');
This comes from a function with is available on launchpad at bazaar.launchpad.net/~mattachu/modelrfq/trunk/view/head:/Matlab/ComsolInterface/getFieldMap.m
Hope it helps!
matt
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Posted:
1 decade ago
Hi mattachu,
Thanks for you reply.
I use Comsol 3.5a and Matlab 2008. I can connect this two programs, but when I save my model in .m format and run it in Matlab, I have not obtained any results!!!
I am not sure that if it is because of Comsol and Matlab programs or I have any other problems in my modeling?! I have attached my mfile to this message, Would you please check it?!
Input and outputs of this mfile should be 40*1 vectors.
Thanks,
Saeid
Thanks for you reply.
I use Comsol 3.5a and Matlab 2008. I can connect this two programs, but when I save my model in .m format and run it in Matlab, I have not obtained any results!!!
I am not sure that if it is because of Comsol and Matlab programs or I have any other problems in my modeling?! I have attached my mfile to this message, Would you please check it?!
Input and outputs of this mfile should be 40*1 vectors.
Thanks,
Saeid
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Posted:
1 decade ago
I use Comsol 3.5a and Matlab 2008.
Ah, I'm sorry then, I only have experience with extracting data from Comsol 4. Unfortunately the functions I mentioned above are only available in later versions of Comsol. When I used to use Comsol 3.5a I just extracted data manually rather than using Matlab.
Hopefully someone else will have the knowledge to help you.