Diffusion and Deposition of Nanoparticles in an Nonisothermal Continuous-Flow Reactor.

By way of mathematical and numerical simulation of an nonisothermic flow of a gas with nanoparticles in a tubular continuous-flow reactor with an nonuniform temperature field, the influence of the diffusion (Brownian diffusion and thermodiffusion) of nanoparticles in this flow and their diffusion deposition on the walls of the reactor on the parameters of the gas-suspension flow in it was investigated. The problem on the two-dimensional flow of a nanogas suspension with a nonuniform transverse velocity profile in such a reactor was solved. The longitudinal and transverse distributions of the concentration of nanoparticles in this suspension and its temperature in the reactor were obtained by the numerical finite difference method. The influence of the initial concentration of nanoparticles in the gas flow at the inlet cross section of the reactor and the Knudsen number of the nanoparticles (their sizes in fact) on the distributions of the characteristics of the disperse-mixture flow in the reactor was determined. [ABSTRACT FROM AUTHOR]