金属液滴在磁场中运动或撞击液膜的数值模拟研究

液滴的运动和撞击液膜现象一直以来都是流体力学界研究的热点。在工业应用中，液滴下落过程中的运动速度，形态变化及其破碎等等方面往往吸引研究者的广泛关注。而对于液滴撞击液膜的现象，其射流的形态变化、二次液滴的形成及其机理也一直是研究的重点与难点。另外在托克马克装置中，这对于液态偏滤器的工作和运行会产生何种影响的机理需要深入研究。本项目旨在利用直接数值模拟方法研究液滴在磁场中运动及其撞击液池过程中液滴的下落速度、界面变化，耦合考虑Reynolds数(Re)、Weber数(We)等因素，深入揭示液滴初始参数对液滴形变、撞击射流的作用机理。采用自适应网格技术精准捕捉界面和流场的细致结构，深入解释内部流动对液滴及其射流形状演化的影响。在此基础上，进一步研究磁场方向，非均匀磁场等不同情况下，液滴及溅射流的界面形态学变化及其机理，为工业应用提供理论支持。

The translation of the drop or the drop impacting onto a pool is always the focus in the fluid mechanics field. In ngineering applications, the falling velocity, morphology and disintegration during the translating and falling of the droplet are fascinating for researchers, while the shape evolutions, the secondary droplet formation and their mechanisms are crucial and difficult points in sight. Moreover, in the Tokomak fusion device, this kind of process is critical for researchers to study the mechanism for proper opperation of the liquid divertor device. Through performing direct numerical simulations, the present research aims to investigate the falling velocity, the interface evolution when the drop is falling, while considering effects of Reynolds number and Weber number. Fundamental interaction mechanism of drop shape evolution and ejecta morphology will be revealed for the initial parameters set for the drop. By implementing adaptive mesh refinement technique to capture the critical structure of the interface and flow field, effects of internal flow on the drop and its jet evolvement will be deeply explained. Furthermore, we will further investigate the influence of the direction of the magnetic field, non-uniform magnetic field for the morphology of the drop and its ejecta, providing theoretical supports for industrial applications.