基于双坐标系的水流场自适应网格优化算法  

Adaptive flow field grid optimization algorithm based on dual-coordinate system

作　　者：陈晶[1] 金永兴[1] 王丛佼[2] 毛奇凰[1] 黄晔[1] 黄常海[1] 

机构地区：[1]上海海事大学商船学院,上海201306 [2]上海海事大学物流工程学院,上海201306

出　　处：《水动力学研究与进展（A辑）》2015年第1期92-99,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(51279099);交通运输部应用基础研究项目(2013329810300);上海海事大学优秀博士学位论文培育项目(2013bxlp004)~~

摘　　要：为了使Delft3D更充分的发挥水流场计算的优势,该文针对Delft3D四边形网格的特征,创建了适宜描述网格调整过程的双坐标系,并基于对网格品质、计算量与计算精度的多重考虑,提出了一种网格自适应优化算法,既保证网格品质控制在工程误差允许的范围内,又可最大限度的降低计算量。经过实际编程试验可知,该算法对软件初始生成的网格的优化处理过程,不仅无须人工确定网格规模,且以最低的计算量实现比Delft3D软件本身自带的优化模块,更加符合水流场的流线排布,同时网格的正交性更优,即自动实现网格规模、品质、贴体程度与计算量的最佳匹配。To assist Delft3 D full play to its advantages on flow field calculation, according to the software’s quadrilateral mesh feature, dual-coordinate system has been created which is suitable for describing grid adjustment process. And one kind of adaptive mesh optimization algorithm has been put forward based on mesh quality, calculation amount and accuracy considerations, which not only ensure grid quality meeting the calculation error requirements, but also maximize the reduction of computation amount. Actual programming experiment shows that grid size needs no artificial determination with this algorithm,and optimization effects of more complying with streamlined arrangement than the software itself optimization module, and the grid orthogonality is better, which automatically generate the best arrangement for size, quality, matching degree and computation amount.

关 键 词：双坐标系 水流场网格 网格品质 正交性 自适应 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]