Comparison of various revised k–ε models and LES applied to flow around a high-rise building model with 1:1:2 shape placed within the surface boundary layer

Recently, CFD (Computational Fluid Dynamics) is being more and more used in the investigation of the flow and thermal around high-rise buildings. In this study, prediction of thermal effect on flow pattern around high-rise buildings model located in the surface boundary layer was carried out using k-e turbulence model. Investigation of thermal effect on flow pattern behind the building and comparison between isothermal and non-isothermal building using standard k-e showed that the surface temperature of building wall led to a strong upward motion close to heating wall and decreased the reattachment length behind it. The model sittings of validation study was accomplished by comparing the simulation of wind flow around building models with the experimental data of Architectural Institute of Japan (AIJ) that results showed in weak wind region, standard k-e has good agreement with experimental.

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Prediction of Wind Flow around High-Rise Buildings Using RANS Models

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.554.724 ◽

2014 ◽

Vol 554 ◽

pp. 724-729 ◽

Cited By ~ 1

Author(s):

Fatemeh Behrouzi ◽

Nor Azwadi Che Sidik ◽

Adi Maimun Abdul Malik ◽

Mehdi Nakisa

Keyword(s):

Fluid Dynamics ◽

Experimental Data ◽

Boundary Layer ◽

Turbulence Models ◽

Wind Flow ◽

Surface Boundary ◽

Reattachment Length ◽

Surface Boundary Layer ◽

High Rise ◽

Rans Models

Recently, CFD (Computational Fluid Dynamics) is being increasingly used to investigation of the flow around high-rise buildings. In this study, prediction of wind flow around two cases high-rise buildings model placed within the surface boundary layer were carried out using various turbulence models. The accuracy of two-equation turbulence models were compared with experimental data of Architectural Institute of Japan (AIJ).as a result, all two-equation models are shown overestimation the reattachment length behind the buildings.

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WIND TUNNEL TEST OF ALONG-WIND OSCILLATIONS FOR A HIGH-RISE BUILDING MODEL WITH HYSTERETIC DAMPER IN TURBULENT BOUNDARY LAYER

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.67.29_2 ◽

2002 ◽

Vol 67 (554) ◽

pp. 29-36 ◽

Cited By ~ 3

Author(s):

Rei OKADA ◽

Tetsuro TAMURA ◽

Akira WADA

Keyword(s):

Boundary Layer ◽

Wind Tunnel ◽

Turbulent Boundary Layer ◽

Wind Tunnel Test ◽

Building Model ◽

High Rise ◽

High Rise Building ◽

Hysteretic Damper

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Prediction of Atmospheric Turbulence Characteristics for Surface Boundary Layer using Empirical Spectral Methods

Revista Brasileira de Meteorologia ◽

10.1590/0102-77863540083 ◽

2020 ◽

Author(s):

Yagya Dutta Dwivedi ◽

Vasishta Bhargava Nukala ◽

Satya Prasad Maddula ◽

Kiran Nair

Keyword(s):

Boundary Layer ◽

Time Series ◽

Surface Roughness ◽

Wind Speed ◽

Atmospheric Turbulence ◽

Surface Boundary ◽

Low Frequencies ◽

Surface Boundary Layer ◽

Power Spectral ◽

Mean Wind Speed

Abstract Atmospheric turbulence is an unsteady phenomenon found in nature and plays significance role in predicting natural events and life prediction of structures. In this work, turbulence in surface boundary layer has been studied through empirical methods. Computer simulation of Von Karman, Kaimal methods were evaluated for different surface roughness and for low (1%), medium (10%) and high (50%) turbulence intensities. Instantaneous values of one minute time series for longitudinal turbulent wind at mean wind speed of 12 m/s using both spectra showed strong correlation in validation trends. Influence of integral length scales on turbulence kinetic energy production at different heights is illustrated. Time series for mean wind speed of 12 m/s with surface roughness value of 0.05 m have shown that variance for longitudinal, lateral and vertical velocity components were different and found to be anisotropic. Wind speed power spectral density from Davenport and Simiu profiles have also been calculated at surface roughness of 0.05 m and compared with k−1 and k−3 slopes for Kolmogorov k−5/3 law in inertial sub-range and k−7 in viscous dissipation range. At high frequencies, logarithmic slope of Kolmogorov −5/3rd law agreed well with Davenport, Harris, Simiu and Solari spectra than at low frequencies.

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