Tall buildings with complex designs have been the recent trend in the field of architecture and structural engineering. For t his kind of buildings, wind flow analysis is equally important as structural analysis since wind loads are dominant for these types of structures. Computational simulation (URANS) turbulent models of Computational fluid dynamics are widely used to study the external flow behavior of a bluff body and its influence of shape factors. Nowadays a variety of problems are occurring because of tall buildings environment like down drought wind, vortices, downwind effects, etc. Wind comfort and safety on and around tall buildings have become important parameters for architects and town planners who need guidelines and simplified tools to take account of wind in their buildings. The objective of this study provides more insight on wind flow over tall buildings with different geometry. In order to evaluate the wind flow around the building in terms of upstream wind, downstream wind, recirculation zones are quantified in terms of width (D) and surface pressure measurements were employed to all geometries. Numerical analysis has been performed in FLUENT software with k-ω SST model as solver. © 2018 Author(s).

Vinayagamurthy G

Mechanical

School of Mechanical Engineering

Chennai Campus

S. A. Prabhaharan

A. Senthilnathan

J. Adhithya

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

&nbsp;

&nbsp;

VIT University

Numerical simulation of tall buildings with various shape factors and investigation of its surrounding effect

AIP Conference Proceedings

In recent days, the behaviour of wind flow around the buildings receives more interest among urban planners, architects, researchers and wind engineers. Hence, these wind flow patterns are assessed extensively using CFD (Computational Fluid Dynamics) simulations, as it re-creates the atmospheric and wind tunnel environment following the turbulence parameters. This paper presents a logical assessment using IDDES (Improved Delayed Detached Eddy Simulation) turbulence model in CFD for predicting wind pressure coefficients and flow features on and around a 300:1 scaled setback tall building model at 0° and 90° AOI (Angle of Incidence) under open terrain condition. The computation is based on gird sensitivity study and validation with Boundary Layer Wind Tunnel (BLWT) experiment measurements. The evaluation shows that the downdraught and downwind effects are suppressed by the increasing wind pressure distribution along the height. The results demonstrate that IDDES can reproduce wind pressure coefficients and aerodynamic coefficients of the setback building accurately. The maximum deviation of the wind pressure coefficients (Cp rms) is found to be 12% in CFD when compared with wind tunnel measurements. Besides, the CFD simulation demonstrates the wind flow distribution patterns, size of re-circulation, wake separation zones and velocity profiles in a three-dimensional plane which are quantified concerning the width of the building. © 2019, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Building Simulation

Experimental and computational investigation of outdoor wind flow around a setback building

Engineering Applications of Computational Fluid Mechanics

Numerical simulation of the effects of building dimensional variation on wind pressure distribution

Journal	AIP Conference Proceedings
Publisher	Author(s)
ISSN	0094243X
Open Access	No