Need Help for Electrical Lab Simulation

jimyang90 · July 24, 2014, 02:25

Hi, I just started learning CFD. I am using FloEFD to simulate the air temperature and velocity in an electrical laboratory. Will there be any difference in my result if I used the default turbulence intensity and length or the default turbulence energy and dissipation in the turbulence parameter the Wizard - Initial Conditions. Or is it recommended to specify a value for either of it? Another thing is that is there any method to speed up the simulation time? It's taking 200++ hours at Result Resolution: 1.

Boris_M · July 29, 2014, 05:58

Hi Jim,
in 99% of all cases you can leave it with the default values. Often this is only necessary if you have specific values from a wind tunnel measurement for example that you want to validate with a simulation. Wind tunnel usually can provide specific turbulence parameters that you would want to match.

But to be honest I used it maybe once or twice in over 7 years and probably a thousand different applications from various industries.
So 99% you don't need to change it.

Boris

July 24, 2014, 02:25	Need Help for Electrical Lab Simulation	#1
jimyang90 New Member Jim Yang Join Date: Jul 2014 Posts: 1 Rep Power: 0	Hi, I just started learning CFD. I am using FloEFD to simulate the air temperature and velocity in an electrical laboratory. Will there be any difference in my result if I used the default turbulence intensity and length or the default turbulence energy and dissipation in the turbulence parameter the Wizard - Initial Conditions. Or is it recommended to specify a value for either of it? Another thing is that is there any method to speed up the simulation time? It's taking 200++ hours at Result Resolution: 1.

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July 29, 2014, 05:58		#2
Boris_M Disabled Join Date: Jul 2009 Posts: 616 Rep Power: 23	Hi Jim, in 99% of all cases you can leave it with the default values. Often this is only necessary if you have specific values from a wind tunnel measurement for example that you want to validate with a simulation. Wind tunnel usually can provide specific turbulence parameters that you would want to match. But to be honest I used it maybe once or twice in over 7 years and probably a thousand different applications from various industries. So 99% you don't need to change it. Boris