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基于FLUENT的大气边界层风场LES模拟
引用本文:王婷婷,杨庆山.基于FLUENT的大气边界层风场LES模拟[J].计算力学学报,2012,29(5):734-739,746.
作者姓名:王婷婷  杨庆山
作者单位:北京交通大学土木建筑工程学院,北京,100044
基金项目:国家自然科学基金重大研究计划重点(90815021); 国家自然科学基金杰出青年基金(50725826)资助项目.
摘    要:通过拟周期边界条件、布置粗糙元和添加随机扰动等措施实现了大气边界层风场的LES模拟。对可能影响数值模拟结果的网格密度、粗糙元高度、随机数大小、随机数赋值方向及范围等主要参数进行分析,确定其影响规律,并据此生成满足目标要求的四类不同地貌大气边界层风场。结果表明,本文的模拟结果满足结构抗风计算的要求,验证了本文所采用的数值模拟方法的可行性,为后续进行结构绕流的大涡模拟提供了有价值的来流生成方法。

关 键 词:结构工程  结构抗风  大涡模拟  大气边界层风场  拟周期边界条件
收稿时间:2011/6/12 0:00:00
修稿时间:2011/12/1 0:00:00

Large eddy simulation of atmospheric boundary layer flow based on FLUENT
WANG Ting-ting and YANG Qing-shan.Large eddy simulation of atmospheric boundary layer flow based on FLUENT[J].Chinese Journal of Computational Mechanics,2012,29(5):734-739,746.
Authors:WANG Ting-ting and YANG Qing-shan
Institution:School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Abstract:A method combining with the pseudo-periodic boundary condition,the roughness elements and random disturbance for large eddy simulation of atmospheric boundary layer flow is described in the paper.The possible parameters influencing the simulation results such as the grid density,the extraction position,the roughness element height and the random number assignment are analyzed.Atmospheric boundary layer flows in four types of terrains are produced through modifying the above influencing parameters.The results got in the paper agree well with desired characteristics and can be adopted as the inflow conditions for the large eddy simulation of flow around buildings.
Keywords:structure engineering  wind resistant  large eddy simulation  atmospheric boundary layer flow  pseudo-periodic boundary condition
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