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pejmanpark November 12, 2010 10:53

Injecting Particles
 
Dear all,

I want to solve a problem in Fluent regarding injection of droplets from a surface. In my injection surface I have about 100 cells and it seems that when I start simulation it only inject 100 particles (equal to number of surface cell).
Does anyone know how can I increase the number of particles?
I think there should be something in Define>Injections> set> File
But I don't know how should I write the File for injection.

I would be glad if anyone can solve the problem.

Cheers,
Pejman

zhang.limin November 12, 2010 15:32

This is a sample of injection file.
 
x y z u v w diameter temperature mass-flow )
( ( -1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 0.0000E+00 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )

You can save this file as TXT or inj file.
It should be worked

pejmanpark November 18, 2010 06:16

Dear Zhang,

Thanks for your help. As I got the impression it will produce an injection point. Do u have any idea how can I make the same file for surface injection.
My surface is something like this:
x=1, 4<y<5, z=0

Thanks

Quote:

Originally Posted by zhang.limin (Post 283277)
x y z u v w diameter temperature mass-flow )
( ( -1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 0.0000E+00 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )

You can save this file as TXT or inj file.
It should be worked


zhang.limin November 18, 2010 08:54

each line is one particle,
 
each line is on particle, that information contains x y z position, uvw velocity, density,. diameter, ......
you can edit how many particles you want, just organize them(differnt position) together line by line.


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