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-   -   operating pressure and operating density (http://www.cfd-online.com/Forums/fluent/43275-operating-pressure-operating-density.html)

phil January 9, 2007 06:19

operating pressure and operating density
 
I am modeling a heat exchanger with two different fluids : water and another one with different.

These two fluids do not mix up.

How can I specify operating density for each of these fluids ? They are totally different.

And if I don't specify operating density, what happens ? how fluent compute it ? Is it a different one for the 2 fluids ? Is there a way to see what the operating density computed by fluent is worth ?

Thanx for any help.

Sujith January 9, 2007 09:37

Re: operating pressure and operating density
 
For multiphase flows it is better to specify Operating density as the density of the lowest of two fluids. If any of the fluid is compressible operating density should be set as zero. By default, Fluent will compute the operating density by averaging over all cells

-Sujith S Nair


Sujith January 9, 2007 10:20

Re: operating pressure and operating density *NM*
 

phil January 11, 2007 13:04

Re: operating pressure and operating density
 
but it is not a multiphase flow, it is 2 fluids separated by a wall...

sso April 5, 2014 03:06

two operating pressure?!?
 
Dear fluent-users
I have the same problem; I have two different incompressible fluids in two pipes. These two streams don’t mix up.
Each of them has a density (has an operation pressure).
How I can specify that I have two different operating pressures or two different densities?
:confused:


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