Abstract
The paper presents a numerical simulation of the propagation of the direct-flow temperature plasma reactor, which is solved by the compressible Navier–Stokes equations, numerical algorithm based on SIMPLE algorithm that are approximated by finite volume method. In the numerical solution of the equation system can be divided into four stages. The first stage the transfer of momentum carried out only by convection and diffusion. The intermediate velocity field is solved by the solution of the differential velocity gradient equation, the Green-Gauss Cell Based scheme is used. The second stage for the pressure field, PRESTO numerical scheme is applied. In the third step it is assumed that the transfer is carried out only by the pressure gradient. The fourth step of the equation is solved for the temperature transport equation as well as the momentum equations by the Green-Gauss Cell Based scheme is used. The algorithm is parallelized on high-performance systems. With this numerical algorithm numerical results of temperature distribution in a continuous-flow plasma reactor was obtained. Numerical modeling allows us to give a more precise description of the processes that have been identified or studied theoretically by laboratory methods, and can reveal new physical phenomena processes that are not yet available, seen in experimental studies. Simulation results show that the constructed numerical model provides the necessary accuracy and stability, which should accurately describe the process during the time interval.
Highlights
Construction and protective materials receive wide and effective use of some powders consisting of hollow microparticles
Hollow ceramic powders are used in the manufacture of composite heat and acoustic insulation materials, light construction and cement fillers, buoyancy elements, explosive mixtures, as well as to provide a basis for catalysts pit, adsorbents, filter elements, encapsulating medium, etc
The compound lighter uranium-235 is diffused slightly faster than uranium hexafluoride 238 – only 1.005 times. This is a tiny advantage can be realized only when the pore size of baffle is much less than length of free path of the molecules of UF6, which is of the order of 10‒8
Summary
Construction and protective materials receive wide and effective use of some powders consisting of hollow microparticles (hollow powder’s). Thermal soot is obtained not by combustion, but by the decomposition of natural gas by passing it through the heated by outside channel. This method gives the largest soot particles up to 10‒8 m radius. Dispersed systems may have more complex structure, for example, be a two-phase formation, each phases of which, being continuous, enters the volume of the other phase Such systems include solids, filled with an extensive system of channels-pores, filled with gas or liquid, some microheterogenous polymer compositions and others. Whereas in paper [35] a very good review on particle simulation of plasma is given
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