Opening closing and opening periodically with time

ranield · October 13, 2017, 00:15

Hello Folks!
I'm modeling an equipment to separate oil emulsified in water, the equipment consists to force the fluids to pass through a porous media, doing the tiny oil's droplets become together, which does the droplets increase it's diameter, doing the droplets to float, by the difference of density.
So, at the end of my equipment I need to have two openings: one at the top (for the oil) and another at the botton (for the water).
My problem is that the oil's opening will not be open all the time, I need to acumulate oil at the top, so, after a pre-defined time, that opening will be opened.

I tried to create two flow analysis, at the first one the oil's opening was closed, so at the moment "X" that analysis would end up and the second analysis would start (initial time = X), but that didn't worked out, the solver just runned the first one.
Somebody could help me with this problem (to couple the two analysis) or has another way to open the opening after a time?

ghorrocks · October 13, 2017, 02:02

The simplest way of doing this is to do an initial simulation with it closed and then a second simulation with it open. I think this is what you are trying to do.

To do this you will need to make the results file in the first simulation the initial condition of the second simulation.

October 13, 2017, 00:15	Opening closing and opening periodically with time	#1
ranield New Member Raniel Albuquerque Join Date: Oct 2017 Posts: 1 Rep Power: 0	Hello Folks! I'm modeling an equipment to separate oil emulsified in water, the equipment consists to force the fluids to pass through a porous media, doing the tiny oil's droplets become together, which does the droplets increase it's diameter, doing the droplets to float, by the difference of density. So, at the end of my equipment I need to have two openings: one at the top (for the oil) and another at the botton (for the water). My problem is that the oil's opening will not be open all the time, I need to acumulate oil at the top, so, after a pre-defined time, that opening will be opened. I tried to create two flow analysis, at the first one the oil's opening was closed, so at the moment "X" that analysis would end up and the second analysis would start (initial time = X), but that didn't worked out, the solver just runned the first one. Somebody could help me with this problem (to couple the two analysis) or has another way to open the opening after a time?

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October 13, 2017, 02:02		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	The simplest way of doing this is to do an initial simulation with it closed and then a second simulation with it open. I think this is what you are trying to do. To do this you will need to make the results file in the first simulation the initial condition of the second simulation.