Numerical Simulation of a Shock-Accelerated Multiphase Fluid Interface
Numerical Simulation of a Shock-Accelerated Multiphase Fluid Interface
复制标题
冲击加速多相流体界面的数值模拟
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Truman
中科院分区：
文献类型：
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作者：
M. Anderson;P. Vorobieff;Sanjay Kumar;J. Conroy;R. White;C. Needham;C. Truman
当两种不同流体之间的界面被脉冲加速时，会产生Richtmyer-Meshkov不稳定性[1，2]。这种不稳定性是由于密度和压力界面的不对准造成的。这种不对准会导致涡量的沉积，导致不稳定的形成，这种不稳定随着时间的推移而非线性增长，最终可能过渡到完全湍流。最近的研究表明，在密度梯度由第二个非流体相引起的多相流中，也会出现类似的不稳定性[3]。
A Richtmyer-Meshkov Instability (RMI) [1, 2] is generated when an interface between two different fluids is impulsively accelerated. The instability develops due to misalignment of the density and pressure interfaces. This misalignment results in the deposition of vorticity, causing the formation of an instability that grows nonlinearly with time and eventually may transition to fully turbulent flow. It has been recently shown that a similar class of instability can evolve in a multi-phase flow [3], where the density gradient is caused by a second, non-fluid phase.