液滴斜撞击湿固体壁面过程在实际生活和工业中具有重要的应用价值，其涉及的流动问题非常复杂，相关机理仍需深入研究。近几年SPH方法已经被应用于液滴撞击表面问题的数值模拟研究。但现有的界面流动SPH算法仍存在算法不够稳定和界面分辨率不高等问题，需要进一步完善。 本项目将针对液滴斜撞击湿固体壁面过程的物理特征，进一步发展不可压界面流动SPH算法，消除压力振荡引起的算法不稳定问题，并通过自适应算法提高界面分辨率；将发展的数值算法应用于液滴斜撞击湿固体壁面过程的研究，结合理论分析和流体稳定性理论，对斜撞击过程的复杂流动机理进行深入研究，提出描述皇冠运动行为的物理模型和溅射临界条件。 这些成果将有助于SPH数值方法的发展，并加深人们对液滴撞击表面过程的认识，为工业应用和实际生活中的相关问题提供理论指导。

The oblique impacts of drop onto wet wall play important roles in our daily life and industrial applications. The involved fluid flows are extremely complex. And the related phenomenon is still far from being full understood. Recently, the SPH methods have been applied to the numerical investigations of drop impacts onto solid and liquid surfaces. However, the current interfacial SPH method is not so stable and has not enough resolutions on the interface. The interfacial SPH method needs to be improved in the future. According to the characters of the oblique impacts of drop onto wet wall, the current project would like to further develop the SPH method for incompressible interfacial flow. The unstable problem of the current SPH method resulting from the pressure oscillation will be removed. The higher resolutions on the interface will be achieved by use of adaptive method. The developed SPH method will be used to investigate the the oblique impacts of drop onto wet wall numerically. Combined with the theoretical analysis and theory of hydrodynamic stability, the oblique impacts will be investigated thoroughly. The theory describing the motion of the crown will be presented. And the splashing condition will be established. Through the current research, the SPH method will be improved and substantial progress in our knowledge of drop-surface interaction will be achieved. It will offer deep insight for us to understand drop-impact-related phenomena in our daily life and industrial applications.