Mass calculation

Submitted by AignerM on Mon, 10/03/2011 - 15:08

Hy @ all,
I would like to calculate & print out the mass and the number of particles included in the calculation area.
I ´ve tried to use the following commands:
variable m equal mass(all)
fix extra all print 100 "$t $m" file out.txt screen no title "%step totalmass"

but I don´t know whats really calculated with this command.

It would be nice, if someone could help me,
Michael

Forums:

ckloss's picture

ckloss | Mon, 10/03/2011 - 16:11

Hi Michael,

does this command sequence work?
"variable m equal mass(all)" should calculate the total particle mass, and fix print outputs it

Christoph

AignerM | Mon, 10/03/2011 - 16:26

Hy Christoph,
the sequence and the print comand both work without problems.
I´m not sure which density is used for calculation. In an former input script I´ve defined the desity as follows:
variable density equal 2500

Is that the density used in the mass(all) command??

Sincerely,
Michael

ckloss's picture

ckloss | Mon, 10/03/2011 - 16:33

The density that is used for the calculation is the one that is assigned to the particles (e.g. via the fix pour, fix particletemplate/sphere or set command, depending on how you insert the particles

Christoph

AignerM | Mon, 10/03/2011 - 16:48

P.S.: Could you please also give me a tip, how can I write out the number of particles included in my simulation....
--> Thanks

AignerM | Mon, 10/03/2011 - 17:32

Thank you for your help....
Now it works and I´m sure about the outcome!!

Michael