Unsteady RANS simulation of wind flow around a building shape obstacle
作者机构：Department of Mathematics&PhysicsNorth South UniversityDhaka 1229Bangladesh Department of MathematicsDhaka University of Engineering&TechnologyGazipur 1708Bangladesh School of Civil EngineeringUniversity of LeedsLeeds LS29JTUK
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2022年第15卷第2期
页 面：291-312页
核心收录：
学科分类：08[工学] 0807[工学-动力工程及工程热物理] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程]
基 金：support for this research gratefully(No.MS20191054) the Faculty Research Grant(CTRG19/SEPS/9 CTRG19/SEPS/15),North South University(NSU),Dhaka,Bangladesh
主 题：turbulent wake vortex shedding flow structures tip vortexes model building URANS turbulent boundary layer
摘 要：This work aims to find the origin and connection of the surface,near-wake,and far-wake structures in the flow encompassing a high-rise building for a high Reynolds *** origin and interconnection of the stream-wise tip vortices,with the other components of the wake,is analysed in this study for the current *** Unsteady Reynolds Averaged Navier-Stokes equations(URANS)together with the realizable k-εturbulence model have been used in this investigation to study the turbulent wake flow following a ground-surface-attached square shape building.A moderately big obstacle aspect ratio of 4,a Reynolds number of 12,000,and a thin evolving boundary layer thickness have been used in the flow *** designed flow addresses the reversed-flows at the outlet during computation to improve the accuracy of the realizable k-e *** Reynolds stress components are retrieved using the Boussinesq *** wake’s principal compositions,including span-wise-side eddies and area of high stream-wise vorticity in the uppermost portion of the wake,are illustrated by both three-dimensional(3D)representations and planner projections of the mean flow distributions.A braided vortex formation,composed of asymmetric hairpin vortexes,is witnessed in the far-wake *** association of the near-wake vortex structures with the far-wake and near-wall flow,which is associated with the flow strengths,is also *** this investigation,few areas of large stream-wise vorticity magnitude,like tip vortexes,are correlated to the 3D curving of the fluid motion,and tip vortices did not continuously reach to the free end part of the *** 3D fluid motion interpretation,which combined several measurements of the flow distribution encompassing the cylinder,shows that the time-averaged near-wake structures are formed of two segments of distinct source and section of ***,addressing reversed-flow during computation shows notable improvement in the results.
维普期刊数据库