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Re: Internal boundary conditions for diffusion equation

Hi Adam, That's a good idea, but unfortunately, the internal boundaries do not subdivide the domain, so there is only one domain. I can solve the problem by making the internal boundary an external one...

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Re: Internal boundary conditions for diffusion equation

Hi, I'd suggest the idea shown in the model linked to at the bottom of this entry. The concept is pretty general, so I will outline it here. Some boundary conditions are available only on exterior...

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Re: Internal boundary conditions for diffusion equation

Thanks Linus, that does solve the problem I'm trying to solve! -joe

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Re: Internal boundary conditions for diffusion equation

may i get that file which shows how to use insulation at internal boundaries ? please help.

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Re: Internal boundary conditions for diffusion equation

may i get that file which shows how to use insulation at internal boundaries ? please help.

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Re: Internal boundary conditions for diffusion equation

Hi these files are only awailable a short time, but the explanations of Linus are straightforward. use an assembly mode and link part of the dedoubled boundary as continuity, another part with your...

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Re: Internal boundary conditions for diffusion equation

Hi Linus: I am just wondering if you could send the example zip file again. I was trying to follow your description but still cannot achieve the interior boundary conditions in COMSOL. I know it has...

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Re: Internal boundary conditions for diffusion equation

Hello Linus, Please, you can make the file available again below? ----------------------------------------------------------------------------------------------- cds.comsol.com/mg/b4a44d998329d6.zip...

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Re: Internal boundary conditions for diffusion equation

Hello Regina, While the approach that Linus described should still work, the internal boundary conditions called Thin Impermeable Barrier, which was introduced after Linus's post, is a much more direct...

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