Buoyancy model: how to set the reference density?

wissal · June 16, 2015, 12:56

Hi everybody

I'm a CFX biginner. So i'm defining the boundary conditions for a new Simulation. I chose "buoyant", and entered the Gravity values for the three axes, and now I want to define the buoancy reference density, but i can only enter the reference tempreture. I only have the value of the reference density. How can i Change it??

Thank you

JuPa · June 17, 2015, 10:14

You can't change it. Buoyancy is a function of temperature in heat transfer systems.

Set the reference temperature to an rough average of the temperature you expect in your system.

June 16, 2015, 12:56	Buoyancy model: how to set the reference density?	#1
wissal New Member Join Date: May 2015 Posts: 8 Rep Power: 10	Hi everybody I'm a CFX biginner. So i'm defining the boundary conditions for a new Simulation. I chose "buoyant", and entered the Gravity values for the three axes, and now I want to define the buoancy reference density, but i can only enter the reference tempreture. I only have the value of the reference density. How can i Change it?? Thank you

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June 17, 2015, 10:14		#2
JuPa Senior Member Mr CFD Join Date: Jun 2012 Location: Britain Posts: 361 Rep Power: 14	You can't change it. Buoyancy is a function of temperature in heat transfer systems. Set the reference temperature to an rough average of the temperature you expect in your system.