面向复杂场景的流体模拟涉及多种介质及它们之间的交互问题，这造成流体真实感模拟的困难。为此，本项目面向多相流场景，研究流体交互现象的三维建模方法，解决多相流-流交互建模、气体-液体耦合建模、流固耦合及边界处理等问题，力图构建逼真的流体交互现象的动画效果。本项目的研究内容主要有三方面：首先，对多相流体-流体交互进行建模，该模型主要用来模拟流体与流体间相互作用及流动情况，然后研究面向多相流体的表面重构方法，解决多相界面构造问题；其次，通过气体粒子与流体粒子的交互来构建气-液相之间各物理量的计算式，然后对气-液相各种耦合现象进行建模；最后，处理流体与刚体及可变形体的交互问题，对刚体表面进行采样，建立刚体表面粒子与流体粒子的交互模型，在统一的粒子框架下实现流固耦合效果。本项目的研究有望解决多相流场景交互现象模拟的相关关键问题，对影视特技、数字娱乐以及虚拟现实等领域具有重要的理论意义和应用价值。

Fluid simulation for complex scenarios involves a variety of media and the interactions between them, which leads to the difficulties for the fluid realistic simulation. Therefore, 3D modeling method for fluid interactive phenomena is studied in this project which orienting the multi-phase flow scenarios. This project intends to solve the problems of multi-phase fluids modeling, gas - liquid coupling modeling, fluid-rigid interaction and boundary handling, which aims to create realistic effects of multi-phase flow and fluid interactive phenomena. The main contents of this project have three aspects. Firstly, the multi-phase fluids modeling, which is used to simulate the interaction and flow between fluids. Then the surface reconstruction method for multi-phase flow is proposed to solve the problem of multi-phase interface construction. Secondly, the physical quantities of gas - liquid coupling are calculated by the interaction of gas particles with fluid particles, then we model the coupling phenomena of gas-liquid. Finally, we handle the interaction of fluid with rigid body as well as fluid with deformable body, and sample the surface of a rigid body. Then we create interaction model of surface particles with fluid particles and implement fluid-solid coupling in a unified framework of particles. The research of this project is expected to solve the key problems of multi-phase flow and interactive phenomena simulation, which has theoretical and practical significance in the fields of film and television special effects, digital entertainment and virtual reality.