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initial condition for heat transfer simulation

Posted Sep 7, 2011, 9:45 a.m. EDT Heat Transfer & Phase Change 2 Replies

Shimon Cohen
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Hi,
I am a new user with COMSOL.
I am trying to emulate a situation where a PCB with some chips on it are working for a long time under specific power.
and in a specific time the circuit power source are changed.
how can I "tell" the simulator to take the initial condition of the time dependent simulation from the stationary simulation result?
2 Replies Last Post Sep 7, 2011, 11:13 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Sep 7, 2011, 11:04 a.m. EDT
Hi

one way is to add a first stationary simulation and a second transient node, then get COMSOL to build the default solver (in 4.2 or newer).
Normally, then you will see a Stored solution in between the two solver sub-nodes. you can then change at will the "Dependent Variable" subnodes to select from which "initial" value(s) to start

It's wothwhile to read a couple of times the solver settings in the doc, and to do a few exercices of the model library to get used to these settings

--
Good luck
Ivar
Hi one way is to add a first stationary simulation and a second transient node, then get COMSOL to build the default solver (in 4.2 or newer). Normally, then you will see a Stored solution in between the two solver sub-nodes. you can then change at will the "Dependent Variable" subnodes to select from which "initial" value(s) to start It's wothwhile to read a couple of times the solver settings in the doc, and to do a few exercices of the model library to get used to these settings -- Good luck Ivar
Shimon Cohen
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Posted: 1 decade ago Sep 7, 2011, 11:13 a.m. EDT
Hi,
Thanks it works
Hi, Thanks it works

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