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Changing boundary condition - Matlab/Comsol
Posted May 9, 2011, 11:13 a.m. EDT 3 Replies
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Hi all,
I've got a problem where I'm trying to simply solve the diffusion equation with boundary conditions that change with time (one interval with a concentration imposed, followed by an interval with insulation bc).
I'm new to Comsol and Comsol with Matlab, but I was able to follow the manual on how to concatenate several transient solutions, but this is still very user intensive, similar to what I was doing before. I'd like to automate the process, and what I can't figure out is how to make the previous iteration's final solution the next iteration's initial condition...it seems like it should be possible.
I hope it's simple, but I'm new to Comsol and Comsol with Matlab so it's taking me some time.
I'm using v3.5a with R2009b. Thanks for any help.
I've got a problem where I'm trying to simply solve the diffusion equation with boundary conditions that change with time (one interval with a concentration imposed, followed by an interval with insulation bc).
I'm new to Comsol and Comsol with Matlab, but I was able to follow the manual on how to concatenate several transient solutions, but this is still very user intensive, similar to what I was doing before. I'd like to automate the process, and what I can't figure out is how to make the previous iteration's final solution the next iteration's initial condition...it seems like it should be possible.
I hope it's simple, but I'm new to Comsol and Comsol with Matlab so it's taking me some time.
I'm using v3.5a with R2009b. Thanks for any help.
3 Replies Last Post Jun 8, 2011, 4:27 a.m. EDT
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Posted:
1 decade ago
Hi
you should define your BC value as a function of time, with smooth transition between the steps (use i.e. Heaviside functions)
--
Good luck
Ivar
you should define your BC value as a function of time, with smooth transition between the steps (use i.e. Heaviside functions)
--
Good luck
Ivar
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Posted:
1 decade ago
hi,
i am studying about homogenisation problems and i am writing a code using matlab.
I want to use the incremental loading method, so the BC change in every step.
I defined BC in first step using pdetool, but i don't know how to defined these in the next step.
Could you help me?
i am studying about homogenisation problems and i am writing a code using matlab.
I want to use the incremental loading method, so the BC change in every step.
I defined BC in first step using pdetool, but i don't know how to defined these in the next step.
Could you help me?
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
hi,
i am studying about homogenisation problems and i am writing a code using matlab.
I want to use the incremental loading method, so the BC change in every step.
I defined BC in first step using pdetool, but i don't know how to defined these in the next step.
Could you help me?
i am studying about homogenisation problems and i am writing a code using matlab.
I want to use the incremental loading method, so the BC change in every step.
I defined BC in first step using pdetool, but i don't know how to defined these in the next step.
Could you help me?