Heat Source (Forced Air Cooling)

will321321 · July 6, 2014, 23:15

Hello Gentlemen,

I am trying to simulate the cooling down of a certain material through force air cooling.

My question is if say I put that certain material in front of a fan and define it as a heat source say 80KW will that material's heat slowly cool down? or will it stay at a constant 80KW.

By the way im using FloEFD.

Thank You in advance for the Help.

Boris_M · July 8, 2014, 05:55

Hi Will,
If you apply a heat source to the material with 80kW then the 80kW are constant through out the simulation and the temperature will converge accoring to the cooling due to the fan.
If the initial condition in the project is lets say 20°C then the material will heat up to the steady state. If you want to do a transient simulation in order to see how long it takes to reach maximum temperature then you can do that too. In general the solver will iterate to the steady state solution in this case as there is no change over time both will reach the same temperature.
In a steady state simulation you will see the temperature reaching maximum over a certain number of iteration but doesn't give you a time that it took to reach it. This is what you can do in a transient simulation.

I hope this helps,
Boris

will321321 · July 8, 2014, 07:11

Hi Boris,

Well explained as always, that input clarified a lot of things to me on how heat source works. Now I have a clearer concept on my simulation.

Thank you so much and God Bless You.

July 6, 2014, 23:15	Heat Source (Forced Air Cooling)	#1
will321321 New Member Join Date: Apr 2014 Posts: 29 Rep Power: 12	Hello Gentlemen, I am trying to simulate the cooling down of a certain material through force air cooling. My question is if say I put that certain material in front of a fan and define it as a heat source say 80KW will that material's heat slowly cool down? or will it stay at a constant 80KW. By the way im using FloEFD. Thank You in advance for the Help.

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July 8, 2014, 05:55		#2
Boris_M Disabled Join Date: Jul 2009 Posts: 616 Rep Power: 23	Hi Will, If you apply a heat source to the material with 80kW then the 80kW are constant through out the simulation and the temperature will converge accoring to the cooling due to the fan. If the initial condition in the project is lets say 20°C then the material will heat up to the steady state. If you want to do a transient simulation in order to see how long it takes to reach maximum temperature then you can do that too. In general the solver will iterate to the steady state solution in this case as there is no change over time both will reach the same temperature. In a steady state simulation you will see the temperature reaching maximum over a certain number of iteration but doesn't give you a time that it took to reach it. This is what you can do in a transient simulation. I hope this helps, Boris

July 8, 2014, 07:11		#3
will321321 New Member Join Date: Apr 2014 Posts: 29 Rep Power: 12	Hi Boris, Well explained as always, that input clarified a lot of things to me on how heat source works. Now I have a clearer concept on my simulation. Thank you so much and God Bless You.