Particle mass calculation
 

Hello,

I have different diameter particles stuck to a different surfaces and I would like to know what is the mass of particles that stuck to a particular surface.
It's a steady simulation and I really cannot find the way to calculate it.


BR

May I assume that the particle exit the simulation when they hit these surfaces? Then I would go to Pre and define csv files (Output Control) with information of particles when they exit the simulation. You can add a lot of variables, including particle massflow.

Thank you for your help.
I have set surface bc in a way that these particles stuck to it as it's quite close to what really happens. Unfortunately CFX does not write info about masses as a default so I set appropriate expert parameter but now it's just impossible to set enough integer memory. I tried change alloc factor to 10 and it was not enough, still getting error either about integer memory or permission denied due to unknown reason (100 GB disk space available).
I guess I need to play with Output Control.

BR

In output control, you can create histograms when particles end on a wall. Via Export you can create the csv files.

BTW, if you have restitution coefficients equal to 0, then I am quite sure that CFX write the massflow information just to the output file. Simply listed. Did you check this? However, if you have a particle size distribution, CFX will give the total mass of all particles in the output file, and not by classes.

I checked it, good that you have mentioned particle size distribution. Yes, I have different particle diameters, presumably this is the reason why it's not that straightforward to pull these data.

BR

Therefore, use the csv-files. This allows you to export the particle diameter and gives you all info you need.

I will try that.
Thank you again.

BR

You were right, it actually is written in output file under Particle Mass Flow Summary.
You saved me a lot of time, really appreciate your help.


BR

It is an advice I can give to everyone on this forum: read the output file.


Regs, Gert-Jan