|June 1, 2010, 17:18||
High depression at low alpha inlet (interFoam)
Santiago Marquez Damian
Join Date: Aug 2009
Location: Santa Fe, Santa Fe, Argentina
Posts: 418Rep Power: 14
Hi all. I'm modeling a two inlet, one outlet device. It's like a vertical tube with a big principal (upper) inlet and a small (bottom) outlet. There is a secondary inlet.
At first time both inlets are set as fixedValue in velocity and zeroGradient in pressure, outlet is fixed value in pressure and zero gradient in velocity. Walls, as usual, are set fixedValue in velocity (0 0 0) and zeroGradient in pressure. Volume fraction is set 1 in inlets and zeroGradient in walls and outlets, it implies in this case that the system is working completely with water.
Problem arises when I set alpha < 1 in the secondary inlet, pressure near this inlets starts to go down, the lower alpha is, the lower pressure is. Secondary phase is air. Will there be any problem with excessive rho/mu ratio? How I can manage this problem in this case? May be BC at secondary inlet are wrong? I solved this problem Fluent without special care.
All answers all welcome... Regards.
Santiago MÁRQUEZ DAMIÁN, Ph.D.
Research Center for Computational Mechanics (CIMEC) - CONICET/FICH-UNL
T.E.: 54-342-4511594 Ext. 1005
Güemes 3450 - (3000) Santa Fe
Santa Fe - Argentina
|Thread||Thread Starter||Forum||Replies||Last Post|
|prob at high inlet velocities||nkc||Main CFD Forum||0||November 27, 2005 22:54|
|high and low reynolds numbers - what does it mean||Bo Busk Jensen||Main CFD Forum||3||September 5, 2002 05:41|
|Alpha to be phased out||Heiko Gerhauser||Main CFD Forum||17||July 25, 2001 14:40|
|Inlet diffuser of ramjet||Mohammad Kermani||Main CFD Forum||25||December 29, 2000 19:46|
|jet oscillation at low inlet Re||wood||Main CFD Forum||1||October 21, 1999 13:45|