液滴振荡变形及其与动态接触角耦合机理

液滴碰撞壁面的振荡过程中，液滴的形态、自由界面、接触角、动态接触角、内部流场、传热传质等，是微细传递现象研究的前沿性课题。对认识复杂的液固相间作用及热质传递，发展相关的高新技术，具有重要的科学价值。本项目通过对液滴碰撞壁面后振荡过程的形态变化及动态接触角等相关宏观物理现象的实验观测，探索研究对象不同属性所呈现出的形状效应、界面效应、尺度效应、各种力场的耦合效应及固-液-气相相互影响等所引起的液滴内的微细流动现象。通过对液滴振荡过程中的形态行为观测，分析各力场对液滴宏观与微观行为的影响，研究发展液滴的自由表面振荡模型、动态接触角的计算模型及它们之间相互耦合模型。探讨液滴碰撞壁面振荡和动态接触角的动力学特征，以及它们之间相互耦合的机理，揭示其现象的物理本质并对其做出科学的描述，旨在揭示研究对象内部的非线性动力过程及其与外在形态的相互作用规律，以期能为形成基础科学理论体系做些必要的探索。

The shape, free interface, contact angle, dynamic contact angle, internal flow field, heat and mass transfer, etc., are front subjects of micro transport phenomena in the oscillating process of droplets after impacting on the solid surface, which have an important scientific value to understand the complicated solid-liquid interaction and heat & mass transfer, and develop the related high technology. The project studies the shape effect, the interface effect, the scale effect and coupling effect of the various force field presented by different properties of the objects and the internal micro flow phenomena of droplets caused by three phases interaction by observing the shape variation, the dynamic contact angle and the related macro physics phenomena during the oscillating process of droplets after impacting on the solid surface, and analyses the effect of the various force fields on macro behavior and micro behavior of droplets, develops the droplet model for free surface oscillation, the dynamic contact angle and the coupling between them, and investigates the dynamical features of the oscillation process, the dynamic contact angle and the coupling mechanism between them by observing the droplet shapes and behaviors. The objective of the project is to shows the physical nature and makes the scientific description of the phenomena and presents the internal nonlinear dynamic process of the object and its interaction rules with the external shapes. The project hopes to do some necessary researches for basic science theory systems.