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-   -   DPM particle breakup (http://www.cfd-online.com/Forums/fluent-udf/96613-dpm-particle-breakup.html)

Seppl January 27, 2012 03:58

DPM particle breakup
 
Hi,

I am trying to model the breakup of inert particles when impacting with walls in a user defined boundary condition (DEFINE_DPM_BC). Is it possible to make two or more particles from one single particle after an impact? I know that the particle's id is the pointer *p, but how can I create new particle ids?

Until now, I am only able to change the particle's diameter and velocity components and save the number of particles in a parcel in a user defined scalar. The problem is, however, that the particles in this parcel follow the same trajectory.

Thanks in advance
Seppl

mali28 February 11, 2012 09:34

Quote:

Originally Posted by Seppl (Post 341448)
Hi,

I am trying to model the breakup of inert particles when impacting with walls in a user defined boundary condition (DEFINE_DPM_BC). Is it possible to make two or more particles from one single particle after an impact? I know that the particle's id is the pointer *p, but how can I create new particle ids?

Until now, I am only able to change the particle's diameter and velocity components and save the number of particles in a parcel in a user defined scalar. The problem is, however, that the particles in this parcel follow the same trajectory.

Thanks in advance
Seppl

You can use the UDF posted at:

http://cape-forum.com/index.php/topic,528.0.html

morihangi October 25, 2012 07:47

Quote:

Originally Posted by Seppl (Post 341448)
Hi,

I am trying to model the breakup of inert particles when impacting with walls in a user defined boundary condition (DEFINE_DPM_BC). Is it possible to make two or more particles from one single particle after an impact? I know that the particle's id is the pointer *p, but how can I create new particle ids?

Until now, I am only able to change the particle's diameter and velocity components and save the number of particles in a parcel in a user defined scalar. The problem is, however, that the particles in this parcel follow the same trajectory.

Thanks in advance
Seppl

Hi Seppl
I've read your comment and understood that you know how to allocate some particles in a parcel.
i'm working on a DPM project and I don't know how to assign for example 100 particles to a parcel. Would you help me?
thanks,


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