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基于标准k-ε模型的大气边界层数值模拟

发表时间:2018-07-13  浏览量:912  下载量:174
全部作者: 叶原君,黄文锋
作者单位: 合肥工业大学宣城校区建筑工程系
摘 要: 在计算风工程中,实现大气边界层入口边界条件的自保持是基本前提条件,然而在很多已发表的文献中这一基本要求被忽视。针对这一问题,本文基于湍流模型和平衡湍流假设,推导了一般风工程中的入口边界条件表达式,并给出了适用于地形风场计算的风速和湍流剖面。最后通过二维平坦场地数值模拟检验所生成风剖面的自保持特性,效果理想。本文为平衡大气边界层的入口边界条件研究提供了一种新思路。
关 键 词: 流体力学;计算风工程;数值模拟;平衡大气边界层;入口边界条件
Title: Numerical simulation of atmospheric boundary layer based on standard k-ε model
Author: YE Yuanjun, HUANG Wenfeng
Organization: Department of Structure Engineering, Hefei University of Technology (Xuancheng Campus)
Abstract: The self-sustaining equilibrium of inflow boundary conditions for atmospheric boundary layers is a basic precondition for computational wind engineering. However, this basic requirement has been neglected in many published studies. Inflow boundary condition expressions for general wind engineering are derived based on the turbulence model and the assumption of equilibrium turbulence. Wind velocity and turbulence profile are proposed for windfield simulation on the scale of topography. A 2D windfield simulation is conducted with a flat topography, and the wind velocity profile demonstrates a satisfactory level of self-sustaining. This paper provides a new idea for the study of inflow boundary conditions of equilibrium atmospheric boundary layer.
Key words: fluid mechanics; computational wind engineering; numerical simulation; equilibrium atmospheric boundary layer; inflow boundary condition
发表期数: 2018年7月第13期
引用格式: 叶原君,黄文锋. 基于标准k-ε模型的大气边界层数值模拟[J]. 中国科技论文在线精品论文,2018,11(13):1372-1377.
 
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