outlet boundary condition

BOUALOUACHE · March 7, 2015, 04:55

hi

i have a configuration of water plunging jet, (water duct and a pool full of water receiving the water,also there is a distance between the duct and the pool free surface), the outlet of the water is from the borders of the pool .
the problem occurs in the boundary condition of the outlet ,because i can't find the appropriate boundary condition to use in this case .
please i need some advices , which boundary condition should i use ?

ghorrocks · March 8, 2015, 05:32

Please show an image of what you are modelling and describe what the flow is doing.

BOUALOUACHE · March 8, 2015, 08:11

i tried to insert an image before but i couldn't , it needs a link ,
but ok i upload a pic with google + ,i hope that u can see it
it is a muptiphase flow (water+air), the water plunging jet entrain the air in the pool .an the over flow (outlet) is in the borders of the pool ,

ghorrocks · March 8, 2015, 18:19

If you let it fall down the side a little then a pressure boundary should be fine.

This is a complex model and will be tricky to get accurate.

March 7, 2015, 04:55	outlet boundary condition	#1
BOUALOUACHE New Member AMB Join Date: Feb 2013 Posts: 24 Rep Power: 13	hi i have a configuration of water plunging jet, (water duct and a pool full of water receiving the water,also there is a distance between the duct and the pool free surface), the outlet of the water is from the borders of the pool . the problem occurs in the boundary condition of the outlet ,because i can't find the appropriate boundary condition to use in this case . please i need some advices , which boundary condition should i use ?

March 8, 2015, 05:32		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	Please show an image of what you are modelling and describe what the flow is doing. BOUALOUACHE likes this.

March 8, 2015, 08:11		#3
BOUALOUACHE New Member AMB Join Date: Feb 2013 Posts: 24 Rep Power: 13	i tried to insert an image before but i couldn't , it needs a link , but ok i upload a pic with google + ,i hope that u can see it it is a muptiphase flow (water+air), the water plunging jet entrain the air in the pool .an the over flow (outlet) is in the borders of the pool , Last edited by wyldckat; March 8, 2015 at 08:54. Reason: fixed broken link

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March 8, 2015, 18:19		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	If you let it fall down the side a little then a pressure boundary should be fine. This is a complex model and will be tricky to get accurate.