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Thermophysics and Aeromechanics

2005 year, number 4

Statistical theory of nanoparticle transport processes in gases and liquids (Review)

V.Ya. Rudyak, A.A. Belkin, and S.L. Krasnolutskii
Novosibirsk State University of Civil Engineering, Novosibirsk, Russia
Pages: 489-507

Abstract

The paper statistically treats nanoparticle transport processes in gases and liquids. We show that nanoparticle transport in rarefied gases can be predicted based on the Boltzman kinetic equations involving a special interaction potential of carrier-gas molecules with the particle. Data on nanoparticle diffusivity versus nanoparticle size and solvent temperature are presented. Mechanisms of nanoparticle relaxation in dense gases and liquids are described. It is shown that the main nanoparticle relaxation mechanism in liquids is the interaction of nanoparticles with microfluctuations of solvent velocity and density fields. For the first time, data on the interaction forces acting on nanoparticles in gases and liquids are reported.