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Thermophysics and Aeromechanics

2014 year, number 4

Computations of instability and turbulent mixing by Nikiforovs model

A.N. Razin and I.V. Bolshakov
Institute of Theoretical and Mathematical Physics, Russian Federal Nuclear Center — VNIIEF, Sarov, Nizhny Novgorod Region, Russia
E-mail: A.N.Razin@vniief.ru
Keywords: turbulence, Nikiforovs model, computations of model experiments

Abstract

The results of modeling several laboratory experiments, including a large class of advanced experimental studies of turbulent flows, are presented. The results of the Meshkovs cylindrical and planar experiments on the confluence of two zones of turbulent mixing, the experiments of Poggi, Barre, and Uberoi have been carried out using the Nikiforovs model. The presented results attest that the Nikiforovs model qualitatively describes the considered class of flows if the mean gas-dynamic quantities are computed with a high accuracy in the technique, and the width of the front of the finite-difference shock wave does not depend on the size of the computational grid cell.