I am trying to get data on the number of particles exiting the pressure outflow plane in my simulation. i can visibly see particles passing through this plane and have put monitors in place, but they are showing no data in the spreadsheet. Are there any other methods to extracting particle count/density/etc from a pressure outflow plane?
Please try with a write interval that is larger than your time step. Writing data every 1E-9 sec is not advisable. Also turn off the time average (leave the sampling interval blank) while troubleshooting.
1 Like
Thanks Jeff. I was trying to decrease the write interval to ensure that I wasn’t missing any, but that hasn’t worked.
I have increased the write interval to larger than the time step and left the sampling interval blank, but the spreadsheet is still all 0’s (Using the SUM monitor).
Please attach your setup file(s) so we can take a look.
1 Like
How long did you let it run? I don’t see any particles crossing the pressure_outflow plane.
iap_simulation_2024-09-11T081506.104759.zip (79.4 MB)
Sorry, I have been changing parameters and that one must not have had particles crossing over. This one definitely displays that, but without the monitor showing it.
OK thanks, I understand what is going on. The monitor region is a plane (and has a zero volume), so there is never any particle in the region, thus the sum of any variable is zero. You either need to use a mass flow rate monitor along a plane to monitor particles crossing that plane, or define a volume region (copy the pressure outlet region and add some thickness in the x-direction) and use it with the monitor type “Sum”.
1 Like
Thank you, that worked perfectly! I understand now that this monitor records particles in the monitor volume region, would there be a way to get a sum of particles that have passed through the plane? Or am I limited to particle in region?