Data for: Vortex-ring-induced elliptical drop deformation process in ambient liquid under an impact: The effects of the drop shape and other parameters

In this paper, the elliptical drop deformation process in ambient liquid under an impact was systematically studied based on an experimental method combined with computational fluid dynamics (CFD). The experiments were conducted on a free-falling drop-tower facility, and the images of the drop shapes were captured by high-speed photography. In the numerical simulation, the Front-Tracking method was adopted to predict the drop deformation process, and a satisfactory consistency was obtained between experimental and numerical results. Furthermore, the effects of nondimensional parameters (i.e., shape parameter e, viscosity ratio , and density ratio ) on the vortex dynamics during the drop deformation process in ambient liquids were systematically investigated. The severity of the elliptical drop deformation process is apparently promoted by e, i.e., with larger e, the vortex dynamics during the drop deformation process is strengthened, and a more severe deformation process occurs. With increasing , the vortex dynamics is gradually weakened. Under a relatively low , the vortex dynamics can be further strengthened by increasing e, while the vortex dynamics shows an opposite trend by decreasing e under a relatively high . With increasing , the vortex dynamics is also apparently strengthened. Under the incompressible condition, the vortex dynamics is approximately unaffected by increasing e.

本文基于实验方法与计算流体动力学（CFD）相结合的研究方法，系统地探讨了在环境液体中受冲击作用下的椭圆液滴变形过程。实验在自由落体液滴塔设施上进行，通过高速摄影技术捕捉了液滴形状的图像。在数值模拟中，采用了前向追踪法来预测液滴变形过程，实验结果与数值模拟结果之间取得了令人满意的吻合。此外，对非维参数（即形状参数 e、粘度比 和密度比 ）对环境液体中液滴变形过程中的涡流动力学的影响进行了系统性的研究。椭圆液滴变形过程的严重程度显然受到 e 的影响，即 e 越大，液滴变形过程中的涡流动力学越强，变形过程越严重。随着 的增加，涡流动力学逐渐减弱。在相对较低的 下，通过增加 e 可以进一步强化涡流动力学，而在相对较高的 下，减小 e 则表现出相反的趋势。随着 的增加，涡流动力学亦明显得到加强。在不可压缩条件下，涡流动力学受 e 增加的影响近似可以忽略。