Setting up a 3DDP Fluent Model

Jaeson · September 23, 2012, 16:27

Good Evening,

I'm using Fluent/Gambit to model the flow of cryogenics through a series of etched plates that form a long path for the fluid. The intent is to force a large drop in the pressure of the fluid which in turn would force a drop in temperature.

I've finished the model in Gambit, but need some advice on how to set up Fluent properly to observe this behavior and see if the pressure drop that occurs is sufficient (settings, etc.)

Could anyone offer some advice on how to set up a scenario like this in Fluent?

shk12345 · September 25, 2012, 12:15

Just paste your model geometries here so that it is easy to understand then what you really wanna do.

shk

Jaeson · September 26, 2012, 22:01

Here's an image of the full model:

Cryogenic fluids (LO2 or LH2) enter the system at a prescribed mass flow rate at the pipe in the back of the image, flow through 40 chambers, and exit through a larger diameter pipe depicted in the front.

The inlet is designated Mass_Flow_Inlet in FLUENT, with the exit designated as Outflow, as I need to see the system alter the fluid's pressure and temperature on its own.

Jaeson · October 4, 2012, 09:46

After trying to run the model in Fluent as a 2-Eqn system, it appears that the boundary between the last chamber and the exit pipe are not connected, as the flow comes to a dead stop at that region.

However, checking the model in Gambit, I do believe the areas are connected and flow should be passing through. Can anyone deduce from the images below what my problem might be?

September 23, 2012, 16:27	Setting up a 3DDP Fluent Model	#1
Jaeson New Member Anonymous Join Date: Sep 2012 Posts: 3 Rep Power: 14	Good Evening, I'm using Fluent/Gambit to model the flow of cryogenics through a series of etched plates that form a long path for the fluid. The intent is to force a large drop in the pressure of the fluid which in turn would force a drop in temperature. I've finished the model in Gambit, but need some advice on how to set up Fluent properly to observe this behavior and see if the pressure drop that occurs is sufficient (settings, etc.) Could anyone offer some advice on how to set up a scenario like this in Fluent?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Seeking Macroscopic Particle Model in Fluent	bzhang7	FLUENT	3	June 25, 2022 18:54
Can FLUENT model flashing liquids?	SWK	FLUENT	9	June 22, 2017 02:17
How to create a 3Ds Car Model importing to FLUENT?	spysunny	Main CFD Forum	1	January 11, 2012 00:40
Why is Fluent unable to deal with my model at the micron scale?	dixylo	FLUENT	4	December 9, 2011 00:39
Covert Star-CD model to FLUENT	Lam	Siemens	6	June 24, 2003 21:21

September 25, 2012, 12:15		#2
shk12345 Senior Member shoeb khan Join Date: Nov 2011 Posts: 179 Rep Power: 15	Just paste your model geometries here so that it is easy to understand then what you really wanna do. shk

September 26, 2012, 22:01		#3
Jaeson New Member Anonymous Join Date: Sep 2012 Posts: 3 Rep Power: 14	Here's an image of the full model: Cryogenic fluids (LO2 or LH2) enter the system at a prescribed mass flow rate at the pipe in the back of the image, flow through 40 chambers, and exit through a larger diameter pipe depicted in the front. The inlet is designated Mass_Flow_Inlet in FLUENT, with the exit designated as Outflow, as I need to see the system alter the fluid's pressure and temperature on its own.

October 4, 2012, 09:46		#4
Jaeson New Member Anonymous Join Date: Sep 2012 Posts: 3 Rep Power: 14	After trying to run the model in Fluent as a 2-Eqn system, it appears that the boundary between the last chamber and the exit pipe are not connected, as the flow comes to a dead stop at that region. However, checking the model in Gambit, I do believe the areas are connected and flow should be passing through. Can anyone deduce from the images below what my problem might be?