Please help, getting unexpected siphoning effect at end of split pipe.

TheReckoner · March 28, 2018, 18:38

Hi all.

I am modeling turbulent flow in this model, and whether or not I specify no pressures or if I specify a small gradient, I am getting this weird siphoning effect just after the pipe intersection. You will see in the video. I have also showed my setup in the video.

https://www.youtube.com/watch?v=cUsM...ature=youtu.be

Can someone tell me how to appropriately set up boundary conditions? I am given an inlet velocity and an inlet head pressure for which to use in my simulation. And I am told that the pressure drop across this part is very very small (this is for a real application).

Much appreciated.

TheReckoner · March 30, 2018, 07:25

Bump.

Please give me a hand. I am not sure what to do here.

March 28, 2018, 18:38	Please help, getting unexpected siphoning effect at end of split pipe.	#1
TheReckoner New Member H. M. Join Date: Feb 2018 Posts: 15 Rep Power: 8	Hi all. I am modeling turbulent flow in this model, and whether or not I specify no pressures or if I specify a small gradient, I am getting this weird siphoning effect just after the pipe intersection. You will see in the video. I have also showed my setup in the video. https://www.youtube.com/watch?v=cUsM...ature=youtu.be Can someone tell me how to appropriately set up boundary conditions? I am given an inlet velocity and an inlet head pressure for which to use in my simulation. And I am told that the pressure drop across this part is very very small (this is for a real application). Much appreciated.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Centrifugal fan	j0hnny	CFX	13	October 1, 2019 13:55
Radiation in semi-transparent media with surface-to-surface model?	mpeppels	CFX	11	August 22, 2019 07:30
Multiphase flow - incorrect velocity on inlet	Mike_Tom	CFX	6	September 29, 2016 01:27
Compression stoke is giving higher pressure than calculated	nickjuana	CFX	62	May 19, 2015 13:32
particle tracking	sakurabogoda	CFX	7	December 4, 2013 23:12

March 30, 2018, 07:25		#2
TheReckoner New Member H. M. Join Date: Feb 2018 Posts: 15 Rep Power: 8	Bump. Please give me a hand. I am not sure what to do here.