Determining Particle Concentration at the outlets

Dan# · January 10, 2023, 01:07

Hi, I have done particle trajectory simulation on Fluent. I have two outlets and I wanna know the mass exiting at each outlets. I tried using sample but it seems like it didn't work. In the console, I got same mass flow rate at each outlets. Could anybody help me with this?

andrew-c · January 10, 2023, 08:56

Try creating a report definition for the mass flowrate at your outlets, you can either plot it during your simulation or compute it to get the values.

See the solution to this thread for more info:
The reporting of mass flow rate

Dan# · January 10, 2023, 12:07

Is it possible to determine the number concentration of particles exiting from each outlet with that mass flux?

andrew-c · January 10, 2023, 12:14

Are you referring to the number of particles/molecules in a physical sense? Or do you mean the number of particles based on the total within your particle trajectory simulation?

For the former, you can figure it out using the molar mass of your constituents. I'm guessing you mean the latter though, and I'm not experienced enough with particle tracking to have an answer.

Dan# · January 10, 2023, 12:16

I have injected particles of 300nm diameter and I wanna know their number concentration at each outlet. I have used surface injection at the inlet.

January 10, 2023, 01:07	Determining Particle Concentration at the outlets	#1
Dan# New Member Deep Join Date: Jan 2023 Posts: 9 Rep Power: 3	Hi, I have done particle trajectory simulation on Fluent. I have two outlets and I wanna know the mass exiting at each outlets. I tried using sample but it seems like it didn't work. In the console, I got same mass flow rate at each outlets. Could anybody help me with this?

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January 10, 2023, 08:56		#2
andrew-c New Member Andrew Join Date: Dec 2022 Posts: 29 Rep Power: 3	Try creating a report definition for the mass flowrate at your outlets, you can either plot it during your simulation or compute it to get the values. See the solution to this thread for more info: The reporting of mass flow rate

January 10, 2023, 12:07		#3
Dan# New Member Deep Join Date: Jan 2023 Posts: 9 Rep Power: 3	Is it possible to determine the number concentration of particles exiting from each outlet with that mass flux?

January 10, 2023, 12:14		#4
andrew-c New Member Andrew Join Date: Dec 2022 Posts: 29 Rep Power: 3	Are you referring to the number of particles/molecules in a physical sense? Or do you mean the number of particles based on the total within your particle trajectory simulation? For the former, you can figure it out using the molar mass of your constituents. I'm guessing you mean the latter though, and I'm not experienced enough with particle tracking to have an answer.

January 10, 2023, 12:16		#5
Dan# New Member Deep Join Date: Jan 2023 Posts: 9 Rep Power: 3	I have injected particles of 300nm diameter and I wanna know their number concentration at each outlet. I have used surface injection at the inlet.