Periodic Multiphase with Different BC for Phases

Luiz · March 26, 2019, 09:50

Does anyone know if it is possible to set an periodic boundary condition for one phase and for the other set an pressure outlet for example?
I am trying to extract the time-averaged flow of water and at the same time extract an residence-time distributions curve from a certain region of the domain. The problem is that by solving exclusively with a periodic bc I would be re-injecting my tracer that should be advected out.

Luiz · March 28, 2019, 17:40

I managed to keep the periodic condition without allowing any tracer to come back by simply setting an automatic command each iteration. I would set the initial portion of my channel as a marked region and maintain its concentration as zero.

Code:

adapt/mark-inout-hexahedron [Inside] [Mouse Clicks] [x0] [x1] [y0] [y1] [z0] [z1] #marks zones which you can patch
solve/patch [domain] [cells] [region] [variable] [value] #patch zones with tracer concentration
solve/execute-commands/add-edit [name] [frequency] ["iteration"/"time-step"] ["command"] #adds an automated command to clear the inlet or outlet

March 26, 2019, 09:50	Periodic Multiphase with Different BC for Phases	#1
Luiz New Member Luiz Oliveira Join Date: Aug 2018 Location: Napoli, Italy Posts: 24 Rep Power: 7	Does anyone know if it is possible to set an periodic boundary condition for one phase and for the other set an pressure outlet for example? I am trying to extract the time-averaged flow of water and at the same time extract an residence-time distributions curve from a certain region of the domain. The problem is that by solving exclusively with a periodic bc I would be re-injecting my tracer that should be advected out.

March 28, 2019, 17:40		#2
Luiz New Member Luiz Oliveira Join Date: Aug 2018 Location: Napoli, Italy Posts: 24 Rep Power: 7	I managed to keep the periodic condition without allowing any tracer to come back by simply setting an automatic command each iteration. I would set the initial portion of my channel as a marked region and maintain its concentration as zero. Code: adapt/mark-inout-hexahedron [Inside] [Mouse Clicks] [x0] [x1] [y0] [y1] [z0] [z1] #marks zones which you can patch solve/patch [domain] [cells] [region] [variable] [value] #patch zones with tracer concentration solve/execute-commands/add-edit [name] [frequency] ["iteration"/"time-step"] ["command"] #adds an automated command to clear the inlet or outlet

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
fluent translationally periodic boundary can not be used for multiphase modeling	zhihuawan	FLUENT	0	January 18, 2018 01:08
Multiphase flow with Periodic Boundary Condition	luludonotcry	Fluent Multiphase	1	March 16, 2016 05:51
HELP! Periodic Problem	foxer	FLUENT	1	June 27, 2012 08:00
[ICEM] how to define periodic in icem ?	mingersai	ANSYS Meshing & Geometry	1	February 3, 2012 17:46
periodic boundary conditions in multiphase model	swarnajay	FLUENT	1	July 24, 2009 11:04