惯性颗粒在非均匀加速流中的输运问题

doi:10.7527/S1000-6893.2021.26390

Abstract

Abstract: The effect of thermal ablation of novel carbon fiber composites material on the aerodynamic force and heat is not fully understood. As the primary research, without considering the chemical reaction, gas injection and other complicate physical process, this study assumes the particle loss from the vehicle surface as a discrete particles dynamics problem. Because of the high temperature in the near wall, and that the local Mach number is vanishingly small, so the near wall fluid flow can be treated as incompressible. Thereby, Particle Resolved Direct Numerical Simulation (PR-DNS) of incompressible flow is used to study the particle dynamics in a strain flow and wall-bounded stagnation point flow. It is found that the particle transport in a wall-bounded stagnation point flow is horizontal, with minimal vertical transport, which is very different from that of parallel shear flow over a particles bed. This is due to the normal hydrodynamic force of stagnation point flow.

Key words: strain flow, wall-bounded stagnation point flow, particle transport mechanism, inertial particle, particle resolved direct numerical simulation

CLC Number:

LI Qing, TU Guohua, YU Zhaosheng, LIN Zhaowu, LI Tingting, YUAN Xianxu. Inertial particle transport in non-uniform accelerated flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(S1): 726390-726390.

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Inertial particle transport in non-uniform accelerated flow

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