"Full" buoyancy model in CFX

Jade M · March 8, 2010, 16:14

ANSYS CFX distinguishes between a "full" buoyancy model as opposed to a Boussinesq buoyancy model for turbulence. What is meant by a "full" buoyancy model?

Is this something intrinsic to CFX or is this a fundamental question related to turbulence modelling?

Thanks so much for any information!

marupio · March 16, 2010, 22:59

Full buoyancy uses the density variations in the fluid to calculate buoyancy force. Boussinesq is for incompressible fluids - "pseudo" buoyancy. It approximates the density variations with a correlation to the temperature variation.

Jade M · March 18, 2010, 13:08

Thanks! I see. So then is "full" buoyancy equivalant to a compressible flow model? It seems that there are some differences between the two?

Thank you very much for any further information!

March 8, 2010, 16:14	"Full" buoyancy model in CFX	#1
Jade M Senior Member Join Date: Feb 2010 Posts: 145 Rep Power: 6	ANSYS CFX distinguishes between a "full" buoyancy model as opposed to a Boussinesq buoyancy model for turbulence. What is meant by a "full" buoyancy model? Is this something intrinsic to CFX or is this a fundamental question related to turbulence modelling? Thanks so much for any information!

March 18, 2010, 13:08	"Full" Buoyancy	#3
Jade M Senior Member Join Date: Feb 2010 Posts: 145 Rep Power: 6	Thanks! I see. So then is "full" buoyancy equivalant to a compressible flow model? It seems that there are some differences between the two? Thank you very much for any further information!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
CFX Liquid Evaporation Model	Jinx	CFX	3	January 28, 2010 16:31
buoyancy effect in k-ε model	Majid Bahari	Main CFD Forum	0	March 11, 2009 11:38
CAD model sliver faces - CFX Mesh - Parasolid?	Ianto	CFX	3	February 8, 2009 18:32
where to set CFX Transition Model?	steven	CFX	6	January 17, 2007 11:19
Use of 1 equation turbulence model in CFX 4.3	Niels Deen	CFX	0	July 19, 2000 08:50

March 16, 2010, 22:59		#2
marupio Senior Member David Gaden Join Date: Apr 2009 Location: Winnipeg, Canada Posts: 364 Rep Power: 9	Full buoyancy uses the density variations in the fluid to calculate buoyancy force. Boussinesq is for incompressible fluids - "pseudo" buoyancy. It approximates the density variations with a correlation to the temperature variation.