The size-mobility relationship of ions, aerosols, and other charged particle matter.

摘要: Abstract Electrical Mobility is arguably the property upon which some of most successful classification criteria are based for aerosol particles and ions in gas phase. Once value mobility empirically obtained, it can be related to a geometrical descriptor charged entity through size-mobility relationship. Given multiscale range sizes field, approaches that provide accurate transformations from size not straightforward, many times rely on experimentally derived parameters. The well-known analytical expression covering whole Knudsen spherical semi-empirical Stokes-Millikan correlation. This matches Stokes' drag friction coefficient continuum regime factor predominantly diffuse reemission molecule free molecular regime, as theorized by Epstein, with empirical slip coefficients chosen agree Millikan's oil drop experiments. Despite its success, correlation has shortcomings. For example, needs modified predict non-spherical entities correction terms when potential interactions or reduced mass effects non-negligible. asymptotic behavior also fails gradual transition specular observed increasingly smaller within regime. Here we make an attempt at providing comprehensive account existing mass-mobility relations continuum, regimes both particles. Epstein's interaction critically explored numerically different gases observation that, particle increases, progression occurs all studied. rate this variation happens seems differ conditions stem combination scattering interactions.