多维物理属性的动态火焰重建技术研究

项目名称： 多维物理属性的动态火焰重建技术研究

项目编号： No.61472020

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 计算机科学学科

项目作者： 吴威

作者单位： 北京航空航天大学

项目金额： 90万元

中文摘要： 火焰是典型的非均匀参与介质，密度稀疏、粒子分布不均匀、光线传播过程复杂，温度分布和演变随机性大，真实感动态火焰重建一直是可研究的热点问题。目前图形学通常采用的物理模拟方法主要表现火焰在几何空间上的视觉真实感，缺乏物理信息；而燃烧学的火焰仿真研究重在测量火焰中物理量的数值分布，缺少力学方程的支持，数值重用困难。本项目拟研究具有物理属性的动态火焰重建，表现有一定物理可信度的火焰模拟。拟从真实火焰现象的数据采样出发，挖掘火焰颜色和温度之间的关系，获取并重建火焰的密度、温度等物理数值场，将物理场和视觉重建结合进行三维火焰的重建和编辑，实现具有物理属性的真实感火焰模拟和编辑。本项目研究为提高真实感模拟的物理可信度提供了一种思路和基础，适用于虚拟消防训练、工业温控和影视特效等具有物理验证性要求的模拟应用。

中文关键词： 温度场；密度场；物理可信度；三维重建；动态火焰

英文摘要： Flame is a typical kind of inhomogeneous participating media whose points have diverse velocities in space. Dynamic flame reconstruction has been a challenging problem with its sparse density, uneven particle distribution, light propagation process complication, randomness in temperature distribution and evolution. The existing physically-based simulation methods dedicate to present the visually reality of flame, but lacks of physical information; while the flame simulation research in combustion science concentrate on the acquisition of physical quantity without the support of mechanics equations. In this proposal, we foucs on the physically validated dynamic flame reconstruction. Deriving from the sampling of the real flame, we calculate the relationship of flame color and temperature, and acquire and reconstruct the fields of flame physical quantities such as density, temperature and radiation. And the reconstruction and edit of physically realistic dynamic flame will be achieved by combining the visually geometrical features reconstruction with physical parameters reconstruction. This project provides a novel idea to improve the physical reliability of dynamic flame simulation, and can be applied to simulate scenarios that require physical verification such as virtual fire training, industrial temperature control and film special effects.

英文关键词： Temperature field;Density field;Physical credibility;Three-dimensional reconstruction;Dynamic flame/fire