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Not able to do time-dependent simulation
Posted Dec 22, 2010, 8:33 a.m. EST Heat Transfer & Phase Change, Materials 1 Reply
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I'm a new user of Comsol 3.5. I try to do a time dependent simulation in the Comsol Multiphysics -> Convection and Conduction. I try to change the temperature as function of time. I select "Boundary Settings" and select "Temperature" and set the value to T0 to 0.1*t. The value t is not recognised. When I change the "Solver Parameters" to "Time Dependent" and "Transient", the parameter t is still not recognised in the "Boundary Settings" menu. I don't know what I'm doing wrong, does anybody have an idea?
Kind regards,
Frank.
Kind regards,
Frank.
1 Reply Last Post Dec 22, 2010, 8:56 a.m. EST
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Posted:
1 decade ago
Hi
are you sure its not that your value is rather low, T is by default in [K] and 0.1[K] is not that common,
Furthermore, you should use units to better visualise the values you are using, in your case its
T = 0.1[K/s]*t as by default t has units [s] and as you state t is defined by COMSOL only when you are in transient
in V4 we have t=0 for non transient cases, but I'm no longer sure if this is/was the case for 3.5a
--
Good luck
Ivar
are you sure its not that your value is rather low, T is by default in [K] and 0.1[K] is not that common,
Furthermore, you should use units to better visualise the values you are using, in your case its
T = 0.1[K/s]*t as by default t has units [s] and as you state t is defined by COMSOL only when you are in transient
in V4 we have t=0 for non transient cases, but I'm no longer sure if this is/was the case for 3.5a
--
Good luck
Ivar