Modeling Heat Flux using FLUENT

ankurgahlot · May 20, 2009, 08:43

I am trying to model a solar collector (using air as fluid) in FLUENT. Right now I am giving a constant temperature to the collector plate and using that to get the air flow pattern.

I want to make it a bit more realistic and use heat flux in place of the constant temperature. The energy at the earth's surface from the sun is available in solar data. So, I am giving it a heat flux of around 700 w/m2.

But the temperature reached in this case is around 400 - 500 kelvin which is unrealistic.

Currently I am using boussinesq approximation and laminar flow.

What else do I need to include in this ?
Could anybody please help me with this.
Thanks

laura_c · April 18, 2013, 03:46

i am experienceing the same problem... but i m using ideal-gas modelling... how did you manage to solve it? thanks

dklastiwka · April 20, 2013, 10:17

We would need more information to solve the problem. Can you send the model and give the reference for the heat flux of 700 W/m^2?

May 20, 2009, 08:43	Modeling Heat Flux using FLUENT	#1
ankurgahlot New Member Ankur Gahlot Join Date: May 2009 Posts: 1 Rep Power: 0	I am trying to model a solar collector (using air as fluid) in FLUENT. Right now I am giving a constant temperature to the collector plate and using that to get the air flow pattern. I want to make it a bit more realistic and use heat flux in place of the constant temperature. The energy at the earth's surface from the sun is available in solar data. So, I am giving it a heat flux of around 700 w/m2. But the temperature reached in this case is around 400 - 500 kelvin which is unrealistic. Currently I am using boussinesq approximation and laminar flow. What else do I need to include in this ? Could anybody please help me with this. Thanks

April 20, 2013, 10:17		#3
dklastiwka New Member Derek Lastiwka Join Date: Feb 2010 Location: Calgary, Alberta, Canada Posts: 25 Rep Power: 5	We would need more information to solve the problem. Can you send the model and give the reference for the heat flux of 700 W/m^2? __________________ Derek Lastiwka Mechanical & Fluids Engineer dlastiwka@graymattereng.com Gray Matter Engineering Inc.

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April 18, 2013, 03:46		#2
laura_c New Member Laura Join Date: Apr 2013 Posts: 15 Rep Power: 2	i am experienceing the same problem... but i m using ideal-gas modelling... how did you manage to solve it? thanks