Defining 1face with 2 boundary conditions

Casper_07 · March 2, 2016, 11:00

Hi everybody,

I have question about defining 2inlets and 2 outlets boundary conditions for two faces. It's impossible to define 2 boundary conditions for one face. Fluid1 is coming from inlet1(outlet2) to outlet1(inlet2) during the switching time. After switching time Fluid2 comes from inlet2 to outlet2.
How Can I solve these problems?

ghorrocks · March 2, 2016, 18:44

I do not understand your question. Can you please show an image of what you are modelling?

Casper_07 · March 3, 2016, 02:07

Quote:

Originally Posted by ghorrocks

I do not understand your question. Can you please show an image of what you are modelling?

For using switching time

ghorrocks · March 3, 2016, 02:13

I still do not understand your question. What do Fluid 1 and 2 do? What do you want to switch?

Are you saying that at the start of the simulation Fluid 1 is flowing from left to right, and after the switching time fluid 2 is flowing from right to left?

Casper_07 · March 3, 2016, 02:17

Quote:

Originally Posted by ghorrocks

I still do not understand your question. What do Fluid 1 and 2 do? What do you want to switch?

Are you saying that at the start of the simulation Fluid 1 is flowing from left to right, and after the switching time fluid 2 is flowing from right to left?

Yes, like that process

ghorrocks · March 3, 2016, 02:19

The easiest way of doing this is to stop and restart the simulation with the boundary conditions changed. Use the first simulation as the initial conditions for the restarted run.

-Maxim- · March 3, 2016, 05:33

I remember your last post from a few days ago. I assume those are connected. For the future, please just post a complete description of your problems including pictures from the very beginning. Otherwise we have a "xy-problem".

March 2, 2016, 11:00	Defining 1face with 2 boundary conditions	#1
Casper_07 New Member Casper Join Date: Nov 2015 Posts: 14 Rep Power: 11	Hi everybody, I have question about defining 2inlets and 2 outlets boundary conditions for two faces. It's impossible to define 2 boundary conditions for one face. Fluid1 is coming from inlet1(outlet2) to outlet1(inlet2) during the switching time. After switching time Fluid2 comes from inlet2 to outlet2. How Can I solve these problems?

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March 2, 2016, 18:44		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I do not understand your question. Can you please show an image of what you are modelling?

March 3, 2016, 02:13		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I still do not understand your question. What do Fluid 1 and 2 do? What do you want to switch? Are you saying that at the start of the simulation Fluid 1 is flowing from left to right, and after the switching time fluid 2 is flowing from right to left?

March 3, 2016, 02:19		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	The easiest way of doing this is to stop and restart the simulation with the boundary conditions changed. Use the first simulation as the initial conditions for the restarted run.

March 3, 2016, 05:33		#7
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	I remember your last post from a few days ago. I assume those are connected. For the future, please just post a complete description of your problems including pictures from the very beginning. Otherwise we have a "xy-problem".