Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
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.
Inlet Boundary condition changing during the simulation
Posted 06.06.2012, 11:16 GMT-4 Version 4.3 2 Replies
Please login with a confirmed email address before reporting spam
I would like to change inlet boundary condition during the simulation. I would to impose on this boundary:
1. A Temperature condition during the charging time (0 – 25000 s)
2. Heat flux boundary condition during the dormancy stage (25000 s – 500000s )
Is it possible? How to do it?
1. A Temperature condition during the charging time (0 – 25000 s)
2. Heat flux boundary condition during the dormancy stage (25000 s – 500000s )
Is it possible? How to do it?
2 Replies Last Post 07.06.2012, 09:44 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi Siyad,
As far as I know it is not possible the change the type of boundary condition during a simulation. However there are some workarounds for this problem.
You could solve your problem with the temperature boundary for until t=25000s, store the solution, manually change the boundary condition to a heat flux one, and use the stored solution as an initial condition for the second stage. When you only need to do a few simulations this might be a solution.
When you need to do a lot of simulation you could try and implement this in MATLAB, using the functionality that lets you run Comsol models in MATLAB.
The last solution I can think of is dependent on the kind of problem you are trying to solve. Maybe there is a way emulate a heat flux condition with the use of a temperature condition with the use of specific functions. Or the other way around (emulate temperature cond. as a heat flux one). Then again this really depends on your physics, so you might want to post the model?
As far as I know it is not possible the change the type of boundary condition during a simulation. However there are some workarounds for this problem.
You could solve your problem with the temperature boundary for until t=25000s, store the solution, manually change the boundary condition to a heat flux one, and use the stored solution as an initial condition for the second stage. When you only need to do a few simulations this might be a solution.
When you need to do a lot of simulation you could try and implement this in MATLAB, using the functionality that lets you run Comsol models in MATLAB.
The last solution I can think of is dependent on the kind of problem you are trying to solve. Maybe there is a way emulate a heat flux condition with the use of a temperature condition with the use of specific functions. Or the other way around (emulate temperature cond. as a heat flux one). Then again this really depends on your physics, so you might want to post the model?
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
these changed of BC conditionally linked to the solver studies will be possible in V4.3 somewhere in the post these days
--
Good luck
Ivar
these changed of BC conditionally linked to the solver studies will be possible in V4.3 somewhere in the post these days
--
Good luck
Ivar