CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CD-adapco (http://www.cfd-online.com/Forums/cd-adapco/)
-   -   Outlet with specified VOLUMETRIC flow rate (http://www.cfd-online.com/Forums/cd-adapco/54681-outlet-specified-volumetric-flow-rate.html)

sKin June 30, 2005 22:18

Outlet with specified VOLUMETRIC flow rate
 
Is it possible to specify a volumetric flow rate at an OUTLET boundary? Since the density for the fluid changes dramatically, mass flow rate cannot reflect the actual case. Thanks!

carno July 1, 2005 03:01

Re: Outlet with specified VOLUMETRIC flow rate
 
Negative inlet is the volumetric flow outlet

som July 1, 2005 05:13

Re: Outlet with specified VOLUMETRIC flow rate
 
putting negative velocity makes solution a bit unstable....aint it?

carno July 1, 2005 07:36

Re: Outlet with specified VOLUMETRIC flow rate
 
Sometimes true.

Skin wants volumetric flow const. But why he is doing so is not understood, since there is no conservation of volume law. Even though density changes mass should remain same, whatever may be the volume flow rate. Flow rate should be inforced only on one side. (either inlet or outlet)

eKin July 11, 2005 21:12

Re: Outlet with specified VOLUMETRIC flow rate
 
Thanks carno and som.

I've tried treat the outlet as inlet with negative velocity. Unfortunately, the solver recognised it as a positive velocity (inflow).


All times are GMT -4. The time now is 19:42.