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Subject: Re: (FLOT)mixing of a gas and liquid flow
Author: Mark Troscinski
Date: 2001-04-10 17:21:00

Hi Mohsin,

Three comments:

* FLOTRAN's capabilities in multiple species transport are limited to
mixing fluids of like phase. Mixing a gas with a liquid typically requires
solving separate sets of momentum equations for each phase, also known as
"multiphase" simulation.

* FLOTRAN can be used to solve liquid/gas flows if the two fluids are
separated by a dividing wall. A single set of momentum equations with the
CMIX property type specification is adequate for this application.

* FLOTRAN can be used to solve liquid/void flows through its free
surface capability. Here liquid volume fractions on a fixed Eulerian mesh
are computed as a function of time. Nothing is computed in the void region.

Hope this helps.

Mark Troscinski
ANSYS, Inc.

-----Original Message-----
Sent: Tuesday, April 10, 2001 2:58 PM
To: xansys

Hi there,

I agree with Dave. My experience with ANSYS in such scenarios has been
bad. CFX was pretty good in the aspect.

regards

reddy

On Tue, 10 Apr 2001, David Cormie wrote:

> With all due respect to all at Ansys, Inc., I don't really think that
Ansys is
> the code to do this with. What you really need for your problem is a
specialist
> CFD code such as Fluent or CFX. If you are wanting to force a solution
from
> Ansys, I am sure that there are people on the list that will be able to
help.

> Regards,
> David Cormie
> EQE International Ltd.

> "Mohsin Raja" on 10/04/2001 13:41:53

> To: xansys

> cc:

> Subject: [xansys] (FLOT)mixing of a gas and liquid flow

> Hi:

> I am trying to model a gas flow (oxygen) entering into a channel in
which
> there is a liquid(water) flowing (Multi-species). I am having a few
problems
> with the solution in FLOTRAN. The solution always exceeds divergence
limits.
> Whenever I use the Fluid Properties as CONSTANT, everything works, but
> when using Fluid Properties for density and viscosity as CMIX, the
solution
> exceeds divergence limits.

> I would be grateful if someone could give me a few tips or advice.

> Thanks in advance

> Mohsin Raja
> UNB Canada

GVS Prabhakar Reddy
Graduate Research Assistant
Biological Resources Engineering(ENBE)

Residence address: Office address:

4910,Hollywood Road Model Analysis Lab ( GIS lab)
College Park,Maryland Biological resources Engineering
USA-20740 University of Maryland,CollegePark
USA-20742

tel:301-982-7148(r) tel:301-405-0109

URLs: http://www.wam.umd.edu/~reddyg ; http://www.glue.umd.edu/~reddyg

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Posts possibly associated with message #22608AuthorDateScore
22573(FLOT)mixing of a gas and liquid flowMohsin Raja raja2@2001/04/10 
22576Re: (FLOT)mixing of a gas and liquid flowDavid Cormie2001/04/10 
22602Re: (FLOT)mixing of a gas and liquid flowPrabhakar Reddy Gudla Venkata Siva reddyg@2001/04/10 
22608Re: (FLOT)mixing of a gas and liquid flowMark Troscinski2001/04/10