Experimentally Verified Three-dimensional Free Surface Fluid Simulation

CTS-9422762 RAAD南方卫理公会大学这项拟议的研究旨在开发一种经过实验验证的三维有限体积方法来模拟自由表面发生严重变形的流体流动。作为计算工作的补充，将使用明渠流动装置和高速摄像机进行实验工作，以实验确定在含有障碍物的明渠中瞬变和稳态流动时自由面的形状。水在水池中的晃动和破碎的模拟将被用来研究在非常活跃的表面上的湍流涡度衰减和在破碎和溢流波下的湍流穿透主体水的重要机制。为了补充利用高速相机获得的定性数据，将使用数字粒子成像测速仪来获得定量的速度数据。所提出的模拟方法将代表着自由表面流体动力学的重大进步。从实践的角度来看，扩展到三维是最重要的，因为模拟必须是三维的，以使其能够实现其作为制造生产力工具的潜力，例如在压铸中，或者作为剧烈流体相互作用的逼真模拟器，例如在水流冲刷堤坝和桥柱时。

ABSTRACT CTS-9422762 RAAD SOUTHERN METHODIST UNIVERSITY The proposed research seeks to develop an experimentally verified, three-dimensional, finite volume method to simulate fluid flows whose free surface is undergoing severe deformations. The computational effort will be complemented by experimental work using an open channel flow apparatus and a high speed video camera to experimentally determine the shape of the free surface during transient and steady-state flows in an open channel containing obstructions. Simulations of water sloshing and waves breaking in a tank will be used to investigate the important mechanisms of the decay of turbulent vorticity on a very active surface and the penetration of turbulence into the main body of water below breaking and spilling waves. To complement the qualitative data obtained by use of the high speed camera, a digital particle imaging velocimeter will be used to obtain quantitative velocity data. The proposed simulation method will represent a significant advance in free surface fluid dynamics. From a practical standpoint, the extension to three dimensions is most important, since the simulation must be three-dimensional to enable it to realize its potential as a manufacturing productivity tool in, say, die casting, or as a realistic simulator of violent fluid interactions such as in water rushing over and around dikes and bridge pillars.