Periodic Multiphase with Different BC for Phases

Luiz · March 26, 2019, 10:50

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, 18:40

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, 10:50	Periodic Multiphase with Different BC for Phases	#1
Luiz New Member Luiz Oliveira Join Date: Aug 2018 Location: Napoli, Italy Posts: 24 Rep Power: 8	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, 18:40		#2
Luiz New Member Luiz Oliveira Join Date: Aug 2018 Location: Napoli, Italy Posts: 24 Rep Power: 8	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

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