Wave structure in the contact line region during high speed droplet impact on a surface: Solution of the Riemann problem for the stiffened gas equation of state
Wave structure in the contact line region during high speed droplet impact on a surface: Solution of the Riemann problem for the stiffened gas equation of state
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DOI：
10.1063/1.1543649
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发表时间：
2003-03
影响因子：
3.2
通讯作者：
K. Haller;Y. Ventikos;D. Poulikakos
中科院分区：
文献类型：
--
作者：
K. Haller;Y. Ventikos;D. Poulikakos
当液滴以足够高的速度冲击刚性基底时，产生邻近冲击表面的波前，将压缩区域与未受干扰的液体块体分离。在该现象发展的某一点上，接触线附近的自由表面屈服，并发生强烈的侧向喷射现象。经常采用的假设，波前是由一个单一的冲击波在其整个表面导致出现异常，喷射喷发之前。这种异常可以通过在接触线区域存在多波结构的命题来消除。本文对接触线区域的波结构进行了解析分析。本文在光滑流区等熵流动的假设下，给出了加筋气体状态方程的一维Riemann问题的精确解。在没有接触不连续的区域中）。在撞击的情况下...
Upon impact of a liquid droplet on a rigid substrate at sufficiently high velocity, a wave front adjacent to the impacted surface is created, separating the compressed area from the undisturbed bulk of the liquid. At a certain point in the evolution of the phenomenon, the free surface at the vicinity of the contact line yields and an intense lateral jetting phenomenon occurs. The often employed assumption that the wave front is composed of a single shock wave across its entire surface leads to the emergence of an anomaly, prior to the jetting eruption. This anomaly can be removed by the proposition of the existence of a multiple wave structure at the contact line region. In this article, the wave structure at the contact line region is explored analytically. The exact one-dimensional Riemann problem solution for the stiffened gas equation of state is presented, under the assumption of an isentropic flow in the smooth flow region (i.e., in the region with no contact discontinuities). For the case of impact...