Question about the SUM monitor type in Particle Data under Monitors

MFiX
1

Dear developers,

Hello everyone. I am currently running a simulation using MFIX-25.1.2, and I would like to use the SUM option under Monitor Type in Particle Data within Monitors to perform some data monitoring.

I have reviewed the user manual, but the explanation of the SUM function is quite brief. I am not entirely sure whether my understanding is correct, and I want to confirm if what I’m monitoring is actually what I intend to monitor.

Let me give you an example to illustrate how I understand it:

Suppose I am monitoring the reaction rate of a certain chemical reaction. When I choose the SUM option for monitoring, does that mean the value being recorded at each time step is the sum of the reaction rates across all particles for that reaction during that time step?

I would greatly appreciate it if any of the developers could help clarify this for me.

Thank you very much!

2

Your interpretation is correct.

3

It is the sum of particle properties (one sum for each variable that is checked in the variable list) belonging to the monitor region. If the region is the entire simulation region, then all particles are considered. If you have a smaller region, particle properties are added only for particles that are inside the region.

4

Thank you for your reply, I feel that I have benefited greatly.

5

Thank you for your reply; it has given me a new understanding.