Using Density Gradient C_R_G(c,t), Pressure Based Solver

Anirudh_Deodhar · February 21, 2011, 12:47

Hi all

I am using VOF method in Fluent to model air-water bubble. I need to use the density gradient inside the bubble interface (where 0 < volume fraction < 1) to write one of the source terms in an equation.
But Fluent doesn't allow me to use "C_R_G(c,t)" macro as I am using Pressure Based solver.
Is there a way to make C_R_G work in pressure based solver using some extra text command or anything else?
Or anybody aware of any other macro to calculate density gradient in the cells in interface region.
Thanks,
Anirudh

Isandor · October 25, 2013, 05:43

Hi,
I am experiencing exactly the same problem. Is there a way to calculate the density gradient in pressure based solver? Is there a workaround or something like that?
Thanks in advance.

February 21, 2011, 12:47	Using Density Gradient C_R_G(c,t), Pressure Based Solver	#1
Anirudh_Deodhar New Member Andeo Join Date: Jun 2010 Location: Pune, India Posts: 12 Rep Power: 15	Hi all I am using VOF method in Fluent to model air-water bubble. I need to use the density gradient inside the bubble interface (where 0 < volume fraction < 1) to write one of the source terms in an equation. But Fluent doesn't allow me to use "C_R_G(c,t)" macro as I am using Pressure Based solver. Is there a way to make C_R_G work in pressure based solver using some extra text command or anything else? Or anybody aware of any other macro to calculate density gradient in the cells in interface region. Thanks, Anirudh

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October 25, 2013, 05:43		#2
Isandor New Member Ahmet Yıldız Join Date: Jul 2012 Posts: 1 Rep Power: 0	Hi, I am experiencing exactly the same problem. Is there a way to calculate the density gradient in pressure based solver? Is there a workaround or something like that? Thanks in advance.