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Particle Transport & Termination Control with User FORTRAN

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Old   December 1, 2011, 12:41
Default Particle Transport & Termination Control with User FORTRAN
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Julian Krick
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Hi!

I would like to use a User FORTRAN to implement my own particle-surface interaction, i.e. I would like a particle to be capture by a cylinder when the surface of the particle and the surface of the cylinder touch. I tried to use the "stick-to-wall" BC, but in this case the particle is only captured, when it's centre coordinates coincide with the surface.

Now my problem: I wrote an User FORTRAN based on the example file "pt_termination.F". I created a 'Particle User Routine' and tried to find the option 'User Defined' in 'Solver Control > Particle Control > Particle Termination Control'.

Thus, does anyone know how to implement a 'Particle User Termination Criteria'?
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Old   December 1, 2011, 21:15
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Liu Jian
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The CFX exmaple pt_breakup_rd.F and pt_breakup_rd.ccl in the file
\ANSYS Inc\v130\CFX\examples\UserFortran show u how to use it.
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Old   December 2, 2011, 10:24
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Quote:
Originally Posted by frank0079 View Post
The CFX exmaple pt_breakup_rd.F and pt_breakup_rd.ccl in the file
\ANSYS Inc\v130\CFX\examples\UserFortran show u how to use it.
Thanks Liu!

I can choose the option 'User defined' as a particle breakup model. However, does this help me, because I'm not interested in the particle-particle interaction, but rather in the particle-wall interaction.

There is also the example 'pt_breakup_wall.F', but this routine is called, when the particle already hit the wall, i.e. when the particle's centre coordinates coincide with the surface. My routine however needs to be called before that. My routine checks if the distance between the wall and the particle's centre coordinates is less than the particle's radius.
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Old   January 12, 2012, 10:48
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I found a way to solve my problem using a User Fortran. I posted the solution here.
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