exhaust jet to free space

Parham · November 25, 2009, 02:05

hi.
i want to simulate a exhaust fire jet to surrounding.
and i have some questions:
1. what boundary conditions is suitable for outlet boundary, pressure oulet or pressure far field?

(i use pressure oulet)
2. when i simulate a turbulent jet without combustion my answer is correct and flow enter to my domain but when i enable model of non-premixed my result would be incorrect because part of flow is going out of lateral boundary

while i expect to enter more flow to my domain because suction at combustion state is more than turbulent state without combustion?

please help me.
with best regards.
Parham
[IMG]file:///D:/Parham%20Omidian/turbulent%20jet.JPG[/IMG]

Parham · April 23, 2010, 18:58

i solved it

thanks

tienmanhnguyen · October 7, 2013, 21:11

Dear Parham,
I am having trouble with the model of free jet into stagnant air. May you give me advice on the geometry I need to modify? the nozzle outlet is 50microns diameter. thank you in advance

November 25, 2009, 02:05	exhaust jet to free space	#1
Parham New Member Parham Omidian Join Date: Nov 2009 Posts: 2 Rep Power: 0	hi. i want to simulate a exhaust fire jet to surrounding. and i have some questions: 1. what boundary conditions is suitable for outlet boundary, pressure oulet or pressure far field? (i use pressure oulet) 2. when i simulate a turbulent jet without combustion my answer is correct and flow enter to my domain but when i enable model of non-premixed my result would be incorrect because part of flow is going out of lateral boundary while i expect to enter more flow to my domain because suction at combustion state is more than turbulent state without combustion? please help me. with best regards. Parham [IMG]file:///D:/Parham%20Omidian/turbulent%20jet.JPG[/IMG]

April 23, 2010, 18:58	that's it	#2
Parham New Member Parham Omidian Join Date: Nov 2009 Posts: 2 Rep Power: 0	i solved it thanks

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October 7, 2013, 21:11		#3
tienmanhnguyen New Member tien Join Date: May 2013 Posts: 12 Rep Power: 12	Dear Parham, I am having trouble with the model of free jet into stagnant air. May you give me advice on the geometry I need to modify? the nozzle outlet is 50microns diameter. thank you in advance