|May 29, 2010, 05:01||
Lagrangian Particle Tacking
Join Date: May 2010
Posts: 1Rep Power: 0
Rencetly, I am implementing a particle-particle collision model into lagrange/intermediate/. When I test a case for tracking a lot of particles at different diameter sizes, which of some are the biger than the grid size, I find the small particles are not beyond the boundary, it is right, but the biger ones have strange behavour, particle sphere border will cross the mesh boundary. I want to known whether the track algorithm has limit to require particle size smaller than mesh size or somewhere exist a bug.
I will be very glad if I know your suggestions for solving this problem.
|May 30, 2010, 08:03||
Join Date: Mar 2009
Location: Perth, Western Australia, Australia
Posts: 82Rep Power: 10
You are correct, the particle code only checks for intersections in the particle's current cell. If the particle is larger than the cell-size (approximately) then the particle can 'miss' the surface, while still being less than it's radius away.
As for overcoming this, I am not sure - we are planning to tackle it by using a distance field, or something similar, to check for impact. At the moment it's not a problem for us (small particles), so we haven't gone very far along this approach.
I would be interested to know how you are implementing the collision mechanics/tests however.
Dr Andrew King
Fluid Dynamics Research Group
|Thread||Thread Starter||Forum||Replies||Last Post|
|print position of Lagrangian particle?||sven82||OpenFOAM Running, Solving & CFD||4||June 16, 2016 08:58|
|Lagrangian particle tracking||jiejie||OpenFOAM||14||December 9, 2011 23:53|
|DPM UDF particle position using the macro P_POS(p)[i]||dm2747||FLUENT||0||April 17, 2009 01:29|
|Plotting particle wall impact angle (Lagrangian pt||Bart Prast||CFX||0||January 26, 2009 05:23|
|Number of particle positions in Lagrangian model||KK||CFX||4||February 16, 2008 05:56|