discrete phase model boundary conditions: problems using "Trap"

giorginho90 · December 4, 2014, 12:35

Hi to everybody! with Ansys Fluent, i would like to simulate the blockage of particles. I want to force particles to stop when they hit a certain surface. If i set "trap", they disappear from the doman. I want to accumulate particles there in order to have a reduction of the hydraulic diameter...could you help me? can i solve this problem with UDFs? I'm not so expert with CFD...thank u!

diamondx · December 4, 2014, 13:52

Trap is what you need. Escape makes them disappear from domain...

giorginho90 · December 4, 2014, 16:04

First of all thank U for the answer. The problem is that i want the particles to remain there and accumulate..in order to influence the continue phase. If i set Trap the particles dont remain there! Am i wrong?

diamondx · December 4, 2014, 16:11

I understood. Trap is what you need ! I don't understand what it does not work

giorginho90 · December 4, 2014, 16:19

I want to simulate the blockage of a channel due to Particles clogging, so i created and internal boundary. Which type of boundary do i have to select for this internal boundary? I was thinking Porous zone(porous jump in 2D) in order to allow the flow of the continue phase and block only particles by setting Trap for the DPM. Do u think it works? Thank u for the ready answer!

December 4, 2014, 12:35	discrete phase model boundary conditions: problems using "Trap"	#1
giorginho90 New Member giorgio Join Date: Nov 2014 Posts: 3 Rep Power: 11	Hi to everybody! with Ansys Fluent, i would like to simulate the blockage of particles. I want to force particles to stop when they hit a certain surface. If i set "trap", they disappear from the doman. I want to accumulate particles there in order to have a reduction of the hydraulic diameter...could you help me? can i solve this problem with UDFs? I'm not so expert with CFD...thank u!

December 4, 2014, 13:52		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	Trap is what you need. Escape makes them disappear from domain... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

December 4, 2014, 16:11		#4
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 28	I understood. Trap is what you need ! I don't understand what it does not work __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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December 4, 2014, 16:04		#3
giorginho90 New Member giorgio Join Date: Nov 2014 Posts: 3 Rep Power: 11	First of all thank U for the answer. The problem is that i want the particles to remain there and accumulate..in order to influence the continue phase. If i set Trap the particles dont remain there! Am i wrong?

December 4, 2014, 16:19		#5
giorginho90 New Member giorgio Join Date: Nov 2014 Posts: 3 Rep Power: 11	I want to simulate the blockage of a channel due to Particles clogging, so i created and internal boundary. Which type of boundary do i have to select for this internal boundary? I was thinking Porous zone(porous jump in 2D) in order to allow the flow of the continue phase and block only particles by setting Trap for the DPM. Do u think it works? Thank u for the ready answer!