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机构地区:[1]华南理工大学土木与交通学院,广州510640 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640
出 处:《科学技术与工程》2010年第32期7964-7969,共6页Science Technology and Engineering
摘 要:网格是湍流风场模拟质量的重要因素。针对三维多块非正交贴体结构网格非匹配拼接问题,提出了收集子块间联接信息的算法。从界面角点出发沿着块公共边推进,跟踪子块累计控制体积边长的相对变化,据此将界面分割为在每块中仅有一个相邻控制体积的小面,同时收集小面的几何信息及其相邻控制体积的编号,并阐述了其在减小湍流风场大涡模拟中的交换误差的作用。对非匹配拼接板驱动腔流的算例表明本文算法可在实现网格密度变化同时不影响精度。Mesh is an important factor to the quality of turbulent wind field simulation. non-matching interface between three-dimensional sub-blocks of non-orthogonal body-fitted structured grids is researched and the algorithm to collecting connection information between sub-blocks is proposed.Starting from a corner point of interface and advancing along common edge of blocks,the edge length of finite volumes(FVs) adjacent to interface is cumulated for each block,by tracking their relationship,the interface can be split into facets which neighbor to one FV in each block,meanwhile whose surface vector and the indices of neighbor FVs are collected.The effect of this algorithm in reducing commutator error in large eddy simulation of turbulent wind field is described also.The case of non-matching lid-driven cavity shows variation of grid density can be achieved without compromising accuracy.
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