Numerical simulation of particle jet formation induced by shock wave acceleration in a Hele-Shaw cell
Numerical simulation of particle jet formation induced by shock wave acceleration in a Hele-Shaw cell
复制标题
DOI：
10.1007/s00193-017-0778-9
复制
发表时间：
2018-05
期刊：
影响因子：
2.2
通讯作者：
A. Osnes;M. Vartdal;B. A. Pettersson Reif
中科院分区：
文献类型：
--
作者：
A. Osnes;M. Vartdal;B. A. Pettersson Reif
本文采用数值模拟的方法研究了在Hele-Shaw室中受激波加速的圆柱状粒子壳中射流的形成。已经进行了大量的模拟，系统地改变了气相和固相之间的耦合，以确定导致射流形成的主要机制。我们发现通过阻力的耦合足以形成射流。粒子体积分数和粒子碰撞对射流的总体性能没有影响，但对射流的长度、间距和数量有一定影响。此外，我们发现射流选择过程早在扩散过程中就开始了，在颗粒层的初始膨胀过程中。
The formation of jets from a shock-accelerated cylindrical shell of particles, confined in a Hele-Shaw cell, is studied by means of numerical simulation. A number of simulations have been performed, systematically varying the coupling between the gas and solid phases in an effort to identify the primary mechanism(s) responsible for jet formation. We find that coupling through drag is sufficient for the formation of jets. Including the effect of particle volume fraction and particle collisions did not alter the general behaviour, but had some influence on the length, spacing and number of jets. Furthermore, we find that the jet selection process starts early in the dispersal process, during the initial expansion of the particle layer.