Please i need help: Set of boundary conditions for inflow with fan.

HAJ256 · March 9, 2013, 05:36

Hello everyone. I am a newbie working with FLUENT. I'm working on the task to school. I will outline my problem. I'm trying to simulate windy turbulence in a plastic box (0.5 m x 0.5 m x 2.5 m) with one input and one output. After the simulation, i compares the simulation results with real measurements.
Problem is: Setting the input boundary conditions. Fails to achieve a comparable situation as in real measurements.

The question is: Can someone help me with setting the input boundary conditions? On entry is the fan, the output is just a hole. Not thinking about heat transfer i am solving just a flow of air.

Thanks a lot for your help.

This is real measurmets of velocity cross hole with fan.

And this is simulation.

delaneyluke · March 14, 2013, 09:11

If you have the fan curve, then you can use the Fan BC as the inlet BC

Regards
Luke

March 9, 2013, 05:36	Please i need help: Set of boundary conditions for inflow with fan.	#1
HAJ256 New Member Lukas Hajek Join Date: Mar 2013 Posts: 1 Rep Power: 0	Hello everyone. I am a newbie working with FLUENT. I'm working on the task to school. I will outline my problem. I'm trying to simulate windy turbulence in a plastic box (0.5 m x 0.5 m x 2.5 m) with one input and one output. After the simulation, i compares the simulation results with real measurements. Problem is: Setting the input boundary conditions. Fails to achieve a comparable situation as in real measurements. The question is: Can someone help me with setting the input boundary conditions? On entry is the fan, the output is just a hole. Not thinking about heat transfer i am solving just a flow of air. Thanks a lot for your help. This is real measurmets of velocity cross hole with fan. And this is simulation.

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March 14, 2013, 09:11		#2
delaneyluke Senior Member Join Date: Mar 2009 Location: Indiana, US Posts: 186 Rep Power: 17	If you have the fan curve, then you can use the Fan BC as the inlet BC Regards Luke