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Hi Pu,

I never tried it myself but there is one interesting example in the documentation that solves an integro- partial differential equation for radiation in pipes. Search the documentation for “Integro”.

Nagi Elabbasi
Veryst Engineering

Hi, Nagi Elabbasi

Thanks for the reply! I will check it.

Yes you can, as well as integro-differential equations. There is an example in documentation, rather strightforward.
I have done it for the radiation transfer problem.

However, actually it is doable only for 1-dim case. For more complicated geometry I have not found the way to do it.
Best,

Arsen Subashiev,
ECE at Stony Brook

subashiev@ece.sunysb.edu

I find that Zimmerman's book has excellent examples of how to solve integral equations. I have just made up a simple example for solving:

u(x)=cos(x)+int(sin(x-y)*u(y),y=0..pi)

The key really is to use the dest() operator in the integral for where you dont have the dummy varible, and I do believe that you can use dest(x) and dest(y) to solve 2D integral equations.

Hope it helps.

I am unable to open the model file that you have posted, because I am using COMSOL versions 4.2a, and 4.3. Could you post a model file showing integration , in COMSOL 4.2a or 4.3.


Krithika Mohan

The model was done in version 4.3a but I happen to have 4.3 so here you go.

Hope it helps

it's great.