Shock-induced ejecta from a layer of spherical particles. Part I: SPH meso-scale simulation

10th International Conference on Aerophysics and Physical Mechanics of Classical and Quantum Systems

物理学;力学

Egorova, M.S.^1 ; Dyachkov, S.A.^1 ; Parshikov, A.N.^1 ; Zhakhovsky, V.V.^1 ; Serezhkin, A.A.^1 ; Menshov, I.S.^1,2 ; Rogozkin, D.B.^1,3 ; Kuratov, S.E.^1

Dukhov Research Institute of Automatics (VNIIA), Sushchevskaya str. 22, Moscow

127055, Russia^1

Keldysh Institute of Applied Mathematics RAS, Miusskaya sq. 4, Moscow

125047, Russia^2

Moscow Engineering Physics Institute, National Research Nuclear University, Kashirskoe Shosse 31, Moscow

115409, Russia^3

关键词: Direct simulation;    Dust particle;    Experimental conditions;    Finite differences methods;    Mesoscale simulation;    Metallic particles;    Photonic doppler velocimetry;    Spherical particle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/815/1/012029/pdf
DOI  :  10.1088/1742-6596/815/1/012029

学科分类：力学，机械学

来源: IOP

【 摘 要 】

According to the data obtained by the Photonic Doppler Velocimetry (PDV) shock wave propagation through a layer of bulked metallic particles produces dust ejecta consisting of fragments with various velocities. While velocity distribution of dust particles can be measured by the PDV, the spatial mass distribution and size distribution of the fragments are hard to derive from the PDV experimental data. To study the mechanism of ejecting and composition of ejected material, direct simulation of experimental conditions is performed with the massive-parallel SPH code. We find that the cumulative jets are produced by the collisions of neighbor spheres accelerated by a shock wave. Those of jets which are able to reach free boundary, leave the layer and decay with formation of many fragments. The data we acquire via direct numerical simulation of the described process is used as initial data for further investigation of dust motion in the air with the finite differences method.