Stopping one phase to leave the simulation field

bweicc · May 14, 2013, 03:36

Hello Friends

Here I have a problem and wish anybody to have some advice>
I am simulating gas/solid 2 phase flow. Solids are in a cylinder and air flows from inlet and outlet. I hope to define the solid particles always in the cylinder since in real case there is a filtrating net at the outlet to stop the solids from getting out.

I set the outlet boundary condition of solid as 'impermeable', but during iterations I still found the particles are decreasing.

Any friends know how to solve this?

Thank you!

bweicc · May 14, 2013, 03:56

Hello

I thought it is because I used Eulerian mixture model instead of Lagrangian model...... But is there anyway to stop the particles in Eulerian Multiphase model?

siara817 · May 14, 2013, 07:15

The particles will move to the outlet and then in the impermeable they will stick to the boundary, but they will be removed from the domain, except you give the boundary condition to be 100% rebound. After changing to impermeable, you need to go to the physic condition and change mode.

bweicc · May 16, 2013, 09:16

Hi Siamak, thank you very much for your reminder! I will pay attention to the setting of boundary.

Regards

May 14, 2013, 03:36	Stopping one phase to leave the simulation field	#1
bweicc New Member bw Join Date: May 2013 Posts: 6 Rep Power: 12	Hello Friends Here I have a problem and wish anybody to have some advice> I am simulating gas/solid 2 phase flow. Solids are in a cylinder and air flows from inlet and outlet. I hope to define the solid particles always in the cylinder since in real case there is a filtrating net at the outlet to stop the solids from getting out. I set the outlet boundary condition of solid as 'impermeable', but during iterations I still found the particles are decreasing. Any friends know how to solve this? Thank you!

May 14, 2013, 07:15		#3
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 17	The particles will move to the outlet and then in the impermeable they will stick to the boundary, but they will be removed from the domain, except you give the boundary condition to be 100% rebound. After changing to impermeable, you need to go to the physic condition and change mode. __________________ Good luck Siamak

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May 14, 2013, 03:56		#2
bweicc New Member bw Join Date: May 2013 Posts: 6 Rep Power: 12	Hello I thought it is because I used Eulerian mixture model instead of Lagrangian model...... But is there anyway to stop the particles in Eulerian Multiphase model?

May 16, 2013, 09:16		#4
bweicc New Member bw Join Date: May 2013 Posts: 6 Rep Power: 12	Hi Siamak, thank you very much for your reminder! I will pay attention to the setting of boundary. Regards