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RISS 인기검색어
- 검색키워드
- 저자 : G.R. Sabareesh (검색결과 3 건)
- 무료
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Effect of building proximity on external and internal pressures under tornado-like flow
G.R. Sabareesh,Shuyang Cao,Jin Wang,Masahiro Matsui,Yukio Tamura 한국풍공학회 2018 Wind and Structures, An International Journal (WAS Vol.26 No.3
Tornadoes are one of the world\'s deadliest natural phenomena. They are characterized by short life span and danger. It has been observed through post-damage surveys that localities with large numbers of buildings suffer major damage during a tornado attack resulting in huge loss of life and property. Thus,it is important to study interfering buildings exposed to tornado-like vortices. The present study focuses on external and internal pressures developed on building models exposed to translating tornado-like vortices in the presence of an interfering building model. The effects of translating speed and swirl ratio of a tornado-like vortex on external and internal pressures for a principal building in the vicinity of an interfering building are investigated. Results indicate that external and internal pressures are enhanced or reduced depending on the location of the interfering building with respect to the principal building.
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Effect of building proximity on external and internal pressures under tornado-like flow
Sabareesh, G.R.,Cao, Shuyang,Wang, Jin,Matsui, Masahiro,Tamura, Yukio Techno-Press 2018 Wind and Structures, An International Journal (WAS Vol.26 No.3
Tornadoes are one of the world's deadliest natural phenomena. They are characterized by short life span and danger. It has been observed through post-damage surveys that localities with large numbers of buildings suffer major damage during a tornado attack resulting in huge loss of life and property. Thus,it is important to study interfering buildings exposed to tornado-like vortices. The present study focuses on external and internal pressures developed on building models exposed to translating tornado-like vortices in the presence of an interfering building model. The effects of translating speed and swirl ratio of a tornado-like vortex on external and internal pressures for a principal building in the vicinity of an interfering building are investigated. Results indicate that external and internal pressures are enhanced or reduced depending on the location of the interfering building with respect to the principal building.
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3D Numerical investigation of a rounded corner square cylinder for supercritical flows
Nivedan Vishwanath,Aditya K. Saravanakumar,Kush Dwivedi,Kalluri R.C. Murthy,Pardha S. Gurugubelli,Sabareesh G. Rajasekharan 한국풍공학회 2022 Wind and Structures, An International Journal (WAS Vol.35 No.1
Tall buildings are often subjected to steady and unsteady forces due to external wind flows. Measurement and mitigation of these forces becomes critical to structural design in engineering applications. Over the last few decades, many approaches such as modification of the external geometry of structures have been investigated to mitigate wind-induced load. One such proven geometric modification involved the rounding of sharp corners. In this work, we systematically analyze the impact of rounded corner radii on the reducing the flow-induced loading on a square cylinder. We perform 3-Dimensional (3D) simulations for high Reynolds number flows (Re=1 × 105) which are more likely to be encountered in practical applications. An Improved Delayed Detached Eddy Simulation (IDDES) method capable of capturing flow accurately at large Reynolds numbers is employed in this study. The IDDES formulation uses a k-ω Shear Stress Transport (SST) model for near-wall modelling that prevents mesh-induced separation of the boundary layer. The effects of these corner modifications are analyzed in terms of the resulting variations in the mean and fluctuating components of the aerodynamic forces compared to a square cylinder with no geometric changes. Plots of the angular distribution of the mean and fluctuating coefficient of pressure along the square cylinder’s surface illustrate the effects of corner modifications on the different parts of the cylinder. The windward corner’s separation angle was observed to decrease with an increase in radius, resulting in a narrower and longer recirculation region. Furthermore, with an increase in radius, a reduction in the fluctuating lift, mean drag, and fluctuating drag coefficients has been observed.
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