2. http://codeblue.umich.edu/hoomd-blue/. 3. http://bulletphysics.org. 4. Various presentations, thesis defense, and a dissertation by Daniel P. Combest.
Producing Randomly Packed Domains of Arbitrarily Shaped Particles Approximated as Polyhedral Objects Dr. Daniel P. Combest, ENGYS, Indianapolis IN Driving Force| Packed-Bed Simulation Packed beds have an inherently complex structure that strongly influences numerous phenomena Macro/Reactor -Scale
Meso-Scale
Particle-Scale
Micro-Scale
Pore-Scale
www.engys.com
Packing Methods
PEM (Continued)
Point Based Methods
Face Based Methods
• Each solid is a point or collection of points • Contact and movement based on “Force Field” LeonnardJones Force
Liquid In
• Used throughout molecular dynamics (MD), discrete element method (DEM), particle in cell (PIC)
Gas Out
Global Phenomena • Pressure Drop • Residence Time Distribution • Transport Induced Limitations
Underlying Cause
Liquid Out
LAMMPS Barracuda OpenFOAM
LIGGGHTS [1] CFDEM [1] HOOMD [2]
• Contact assessed at each face • Contact response can be similar to point based methods • Used throughout video game and movie industry
Bullet Physics [3] Open Dynamics Engine Newton Game Dynamics PhysX
