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-   -   How to create liquid gaseous interaction in the same container? (http://www.cfd-online.com/Forums/cfx/80422-how-create-liquid-gaseous-interaction-same-container.html)

haristrawberry September 25, 2010 02:11

How to create liquid gaseous interaction in the same container?
 
My problem consists of a closed tank with half filled liquid with remaining filled with pressurised air!! tank consists of one baffle plate to reduce the turbulence. the inlet s going to be a pipe attached to the tank! so how to define the liquid and gaseous region separetly in the tank?

and also wat kind of turbulence model can be given if the liquid is having reynolds no of 13000?

joey2007 September 25, 2010 13:57

In 12.1 one define your air and your water as two continuos fluids. Acitvate free surface model.

K-eps should be most stable, SST should work also.

ghorrocks September 25, 2010 19:24

Use the SST turbulence model for all turbulence modelling unless you have a good reason not to. My opinion is SST is the baseline turbulence model now and has superseded the k-e model.

sircorp June 14, 2015 06:39

Quote:

Originally Posted by ghorrocks (Post 276645)
Use the SST turbulence model for all turbulence modelling unless you have a good reason not to. My opinion is SST is the baseline turbulence model now and has superseded the k-e model.

"Convection Cooling inside Pressurized Tank" ?

Hi Ghorrocks

I inject a pressurized Gaseous Fluid in to Pressurized Tank Filled with Hot Viscous Fluid". Should I choose SST or K-E ? However due to high glow rates, my system is acts as fluidised system.

System has multiple flow rate regions(orifice plates). In some regions flow rates are low while in other pretty high(orifice plates)

These orifice plates are killing me. 99% of meshing is there. Also some time due to over heating Fluent Drops or some time due to over Reverse Flow.

But it is all fun doing thing new.

?

ghorrocks June 14, 2015 06:54

Let me quote my previous post:

Quote:

Use the SST turbulence model for all turbulence modelling unless you have a good reason not to.
You do not appear to have a good reason not to so the recommendation is clear.

If zillions of oriface plates are causing havoc then replace them with momentum source terms. This is much simpler and often more accurate.


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