Effects of side ratio for ‘Y’ plan shaped tall building under wind load

Research on wind barrier of canyon bridge-tunnel junction based on wind characteristics

“…The sensitivity of the results for various velocity and turbulent intensity should be studied to. In Sanyal and Dalui (2020)’s study, the effects of velocity and Reynolds numbers on the velocity profile and the force and moment coefficients were examined under different levels of wind velocity, and the results showed that the dependence of air velocity on aerodynamic coefficients was limited. For the bridge-tunnel junction with 20 m spacing under 0° wind direction angle, the effect of different inlet velocities (under 0.5% turbulence intensity) and turbulence intensity (under 8m/s inlet velocity) on the wind speed ratio was examined.…”

“…In a study on the train passing through the wind barrier transition (Liu et al, 2018), the tetrahedral mesh was used to fill the complex geometry of the domain, and the numerical simulation results agree fairly well with the full-scale test results. In some CFD studies of buildings (Lo et al, 2016; Sanyal and Dalui, 2020; Xing et al, 2018), tetrahedral meshes were used around building model and relatively satisfactory results were obtained. Considering the complex geometry of the bridge-tunnel junction, unstructured tetrahedral grids are used to fill the domain.…”

Wind Effects on Rectangular and Triaxial Symmetrical Tall Building Having Equal Area and Height

“…Inlet wind speed is provided as the power law where the reference height in the simulation is considered as 1 m, while the reference velocity is defined as 10 m/s. e wall of the domain is considered as a free slip wall, while the ground of the domain is a rough wall [43].…”

“…e accuracy of CFD simulation can be seriously compromised when wall function roughness modification based on the experimental data for sand grain roughened pipes and channels are applied at the bottom of the computational domain. Numerical studies are already conducted on the different types of the plan shape structure, such as Tian et al [34] on a rectangular shape, Gaur and Raj [35] on corner modification on a square and a plus shaped building, Raj et al [36], Keerthana and Harikrishna [37]on the "H" plan, Kumar and Raj [38] on an octagonal plan shape, Raj et al [39] obtained response of a square and a plus shaped building by varying wind loads, Gaur et al [40] studied the interference effect using CFD, Mukherjee et al [41], Sanyal and Dalui [42][43][44][45], Goyal et al [46] on the "Y" shape, Meena et al [47], Kumar and Raj [48] on the "L" shape, Raj and Ahuja [49], on the "+" shape, Sanyal and Dalui [50] on the rectangular shape having some modification, Meena et al [51] investigated the wind effects on the regular shaped structure having a rectangular plan with various corner modifications, Mallick et al [52] on the "C" shape, Amin and Ahuja [53] on the side ratio of a rectangular building, Amin and Ahuja [54] obtained response of a tall building against the wind load. e considerable outcomes after modifying the shapes of the structure are as the Strouhal number is not sensitive to the aspect ratio, flow reattachment of the separated shear layer in the corner cut model present suction into corners, which is further caused in the reduction of drag, interference position of the building is highly effecting principal building pressure distribution, the length/width (side ratio) makes changes into the upwash, downwash, and the stagnation zone on upstream of flow, shielding effects were the main factors which is controlling the spacing between the buildings, highest wind velocity is obtained at the edges of the windward side and minimum at the leeward side, maximum suction is observed at the corner of the building, it is important to give due consideration for suction on the corner region, by increasing the L/W ratio horizontal force coefficient and overturning moment coefficient increases by the significant amount, the model with the rounded corner is best to reduce wind loads and overturning moments, in comparison of the chamfer corner, rounded corner are efficient in reducing the wind load, deflection is observed due to the presence of vortices in the wake region of buildings, the accuracy of the k-ε turbulence m...…”

Wind Excited Action around Tall Building Having Different Corner Configurations

“…CFD technique gives the wind effects on various shapes of high-rise buildings in quick time; it works by dividing the building geometry into small elements using meshing, and a number of studies have been carried out on various shapes, for example, Bhattacharyya and Dalui [26] on "E" shape, Raj et al [27] on "H" shape, He and Song [28] on TTU building, Yu and Kareem [29] and Sanyal and Dalui [30] on rectangular shape, Paul and Dalui [31] and Okajima et al [32] on rectangular shape with horizontal limbs, Paul and Dalui [33] on "+" shape, Hajra and Dalui [34] on octagonal shape, Gaur and Raj [35] on square model, Bairagi and Dalui [36] on stepped building model, and Sanyal and Dalui [37][38][39][40] on "Y" shape building model. e major findings obtained through the numerical simulation are as follows: results obtained through the numerical simulation are significantly affected by the mesh size, pressure distributed on the building model depends on the height of the building model, velocity alteration is found on the roof of the building model, and the drag force depends on the exposure to wind.…”