Help for transient thermal simulation

baccus · May 13, 2020, 10:24

Hi everyone,

I am running a transient heat transfer simulation. I looked for but can't find a solution that satisfies me.

In solution settings, I have options to set both Courant # and time step size seperately. Considering my constant velocity, constant mesh size and CFL equation ( CFL#= V*deltat / deltax ); time step size and CFL number should be related. If I enter irrelevant values for them, which parameter is used by the software ?

It is similar to the question that; if I can enter time step size, why there is an option to set CFL or vice versa? (for fixed mesh and velocity)

vinerm · May 13, 2020, 10:28

Refer the following

wrong solution at LOW CFL number

baccus · May 13, 2020, 10:38

Thanks. Now I got the difference.

May 13, 2020, 10:24	Help for transient thermal simulation	#1
baccus New Member Mert Join Date: Aug 2016 Location: Turkey Posts: 12 Rep Power: 10	Hi everyone, I am running a transient heat transfer simulation. I looked for but can't find a solution that satisfies me. In solution settings, I have options to set both Courant # and time step size seperately. Considering my constant velocity, constant mesh size and CFL equation ( CFL#= V*deltat / deltax ); time step size and CFL number should be related. If I enter irrelevant values for them, which parameter is used by the software ? It is similar to the question that; if I can enter time step size, why there is an option to set CFL or vice versa? (for fixed mesh and velocity)

May 13, 2020, 10:28	Flow Courant Number	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	Refer the following wrong solution at LOW CFL number __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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May 13, 2020, 10:38		#3
baccus New Member Mert Join Date: Aug 2016 Location: Turkey Posts: 12 Rep Power: 10	Thanks. Now I got the difference.