Advanced Search
Article Contents

Effects of Street-Bottom and Building-Roof Heating on Flow in Three-Dimensional Street Canyons


doi: 10.1007/s00376-009-9095-2

  • Using a computational fluid dynamics (CFD) model, the effects of street-bottom and building-roof heating on flow in three-dimensional street canyons are investigated. The building and street-canyon aspect ratios are one. In the presence of street-bottom heating, as the street-bottom heating intensity increases, the mean kinetic energy increases in the spanwise street canyon formed by the upwind and downwind buildings but decreases in the lower region of the streamwise street canyon. The increase in momentum due to buoyancy force intensifies mechanically induced flow in the spanwise street canyon. The vorticity in the spanwise street canyon strengthens. The temperature increase is not large because relatively cold above-roof-level air comes into the spanwise street canyon. In the presence of both street-bottom and building-roof heating, the mean kinetic energy rather decreases in the spanwise street canyon. This is caused by the decrease in horizontal flow speed at the roof level, which results in the weakening of the mean flow circulation in the spanwise street canyon. It is found that the vorticity in the spanwise street canyon weakens. The temperature increase is relatively large compared with that in the street-bottom heating case, because relatively warm above-roof-level air comes into the spanwise street canyon.
  • [1] MIAO Yucong, LIU Shuhua, CHEN Bicheng, ZHANG Bihui, WANG Shu, LI Shuyan, 2013: Simulating Urban Flow and Dispersion in Beijing by Coupling a CFD Model with the WRF Model, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1663-1678.  doi: 10.1007/s00376-013-2234-9
    [2] Jae-Jin KIM, Do-Yong KIM, 2009: Effects of a Building's Density on Flow in Urban Areas, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 45-56.  doi: 10.1007/s00376-009-0045-9
    [3] Mohamed F. YASSIN, 2009: Numerical Study of Flow and Gas Diffusion in the Near-Wake behind an Isolated Building, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 1241-1252.  doi: 10.1007/s00376-009-8025-7
    [4] Jae-Jin KIM, Jong-Jin BAIK, 2005: Physical Experiments to Investigate the Effects of Street Bottom Heating and Inflow Turbulence on Urban Street-Canyon Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 230-237.  doi: 10.1007/BF02918512
    [5] LIU Huizhi, LIANG Bin, ZHU Fengrong, ZHANG Boyin, SANG Jianguo, 2003: A Laboratory Model for the Flow in Urban Street Canyons Induced by Bottom Heating?, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 554-564.  doi: 10.1007/BF02915498
    [6] Na LI, Lingkun RAN, Shouting GAO, 2016: The Impact of Deformation on Vortex Development in a Baroclinic Moist Atmosphere, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 233-246.  doi: 10.1007/s00376-015-5082-y
    [7] Jang-Woon WANG, Jae-Jin KIM, Wonsik CHOI, Da-Som MUN, Jung-Eun KANG, Hataek KWON, Jin-Soo KIM, Kyung-Soo HAN, 2017: Effects of Wind Fences on the Wind Environment around Jang Bogo Antarctic Research Station, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1404-1414.  doi: 10.1007/s00376-017-6333-x
    [8] HU Wei, ZHONG Qin, 2010: Using the OSPM Model on Pollutant Dispersion in an Urban Street Canyon, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 621-628.  doi: 10.1007/s00376-009-9064-9
    [9] LI Lei, YANG Lin, ZHANG Li-Jie, JIANG Yin, 2012: Numerical Study on the Impact of Ground Heating and Ambient Wind Speed on Flow Fields in Street Canyons, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 1227-1237.  doi: 10.1007/s00376-012-1066-3
    [10] CHENG Xueling, HU Fei, 2005: Numerical Studies on Flow Fields Around Buildings in an Urban Street Canyon and Cross-Road, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 290-299.  doi: 10.1007/BF02918518
    [11] JIANG Yujun, LIU Huizhi, SANG Jianguo, ZHANG Boyin, 2007: Numerical and Experimental Studies on Flow and Pollutant Dispersion in Urban Street Canyons, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 111-125.  doi: 10.1007/s00376-007-0111-0
    [12] LIU Huizhi, LIANG Bin, ZHU Fengrong, ZHANG Boyin, SANG Jianguo, 2004: Water-Tank Experiment on the Thermal Circulation Induced by the Bottom Heating in an Asymmetric Valley, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 536-546.  doi: 10.1007/BF02915721
    [13] H.L. Kuo, 1995: Three-dimensional Global Scale Permanent-wave Solutions of the Nonlinear Quasigeostrophic Potential Vorticity Equation and Energy Dispersion, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 387-404.  doi: 10.1007/BF02657001
    [14] Sun Litan, Huang Meiyuan, 1994: Improving the Vorticity-Streamfunction Method to Solve Two-Dimensional Anelastic and Nonhydrostatic Model, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 247-249.  doi: 10.1007/BF02666551
    [15] Xu Jianjun, 1993: Quasi-40-Day Oscillation and Its Teleconnection Struc-ture together with the Possible Dependence on Conversion of Barotropic Unstable Energy of Temporal Mean Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 193-200.  doi: 10.1007/BF02919141
    [16] Luo Zhexian, 1987: ABRUPT CHANGE OF FLOW PATTERN IN BAROCLINIC ATMOSPHERE FORCED BY JOINT EFFECTS OF DIABATIC HEATING AND OROGRAPHY, ADVANCES IN ATMOSPHERIC SCIENCES, 4, 137-144.  doi: 10.1007/BF02677060
    [17] Shou Shaowen, Li Shenshen, 1991: Diagnosis of Kinetic Energy Balance of a Decaying Onland Typhoon, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 479-488.  doi: 10.1007/BF02919270
    [18] Gao Shouting, Lei Ting, 2000: Streamwise Vorticity Equation, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 339-347.  doi: 10.1007/s00376-000-0027-4
    [19] Brian HOSKINS, 2015: Potential Vorticity and the PV Perspective, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 2-9.  doi: 10.1007/s00376-014-0007-8
    [20] Zuohao Cao, 1999: Dynamics of Absolute Vorticity in the Boussinesq Fluid, ADVANCES IN ATMOSPHERIC SCIENCES, 16, 482-486.  doi: 10.1007/s00376-999-0025-0

Get Citation+

Export:  

Share Article

Manuscript History

Manuscript received: 10 May 2010
Manuscript revised: 10 May 2010
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Effects of Street-Bottom and Building-Roof Heating on Flow in Three-Dimensional Street Canyons

  • 1. Department of Environmental Atmospheric Sciences, Pukyong National University, Busan 608--737, Republic of Korea,School of Earth and Environmental Sciences, Seoul National University, Seoul 151--742, Republic of Korea

Abstract: Using a computational fluid dynamics (CFD) model, the effects of street-bottom and building-roof heating on flow in three-dimensional street canyons are investigated. The building and street-canyon aspect ratios are one. In the presence of street-bottom heating, as the street-bottom heating intensity increases, the mean kinetic energy increases in the spanwise street canyon formed by the upwind and downwind buildings but decreases in the lower region of the streamwise street canyon. The increase in momentum due to buoyancy force intensifies mechanically induced flow in the spanwise street canyon. The vorticity in the spanwise street canyon strengthens. The temperature increase is not large because relatively cold above-roof-level air comes into the spanwise street canyon. In the presence of both street-bottom and building-roof heating, the mean kinetic energy rather decreases in the spanwise street canyon. This is caused by the decrease in horizontal flow speed at the roof level, which results in the weakening of the mean flow circulation in the spanwise street canyon. It is found that the vorticity in the spanwise street canyon weakens. The temperature increase is relatively large compared with that in the street-bottom heating case, because relatively warm above-roof-level air comes into the spanwise street canyon.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return