Algorithm for Computing Particle/Surface Interactions
Tuesday, 01 December 2009
An algorithm has been devised for predicting the behaviors
of sparsely spatially distributed particles impinging on a solid
surface in a rarefied atmosphere. Under the stated conditions,
prior particle-transport models in which (1) dense distributions
of particles are treated as continuum fluids; or (2)
sparse distributions of particles are considered to be suspended
in and to diffuse through fluid streams are not valid. In the present algorithm, individual particle/surface interactions
are modeled. The algorithm uses a few key parameters
that can be determined experimentally for the particles
of interest in a given application: These parameters are the
coefficient of restitution, coefficient of transfer of momentum,
diffusivity, and sticking velocity. If many representative
particles are tracked through modeling by use of this algorithm,
a statistically likely distribution of particles can be
This work was done by David W. Hughes of Goddard Space Flight
Center. For more information, download the Technical Support
Package (free white paper) at www.techbriefs.com/tsp under the
Information Sciences category. GSC-15364-1
This Brief includes a Technical Support Package (TSP).
Algorithm for Computing Particle-Surface Interactions (reference GSC-15364-1) is currently available for download from the TSP library.
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