Numerical Simulation of Thermal Atmospheric Conditions in an Idealized Street Canyon: Comparison Between RANS and LES

A. W. Muhammad Yazid; S. M. Salim; S. Mansor

Numerical Simulation of Thermal Atmospheric Conditions in an Idealized Street Canyon: Comparison Between RANS and LES

Authors

A. W. Muhammad Yazid 1Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
S. M. Salim 2School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, 62100 Putrajaya, Malaysia
S. Mansor Department of Aeronautics, Automotive & Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia

Keywords:

Idelized street canyon , Thermal atmospheric conditions , RANS , LES

Abstract

This paper reports on the numerical comparison for the prediction of wind flow structure under thermal atmospheric conditions between a steady state Reynolds-averaged Navier-Stokes (RANS) model (the standard k-ε and a large eddy simulation (LES) technique with dynamic Smargorinsky-Lilly subgrid-scale (SGS) model against the previous experimental wind tunnel data.Two cases of thermal conditions are investigated, one for a different Fr number with leeward heated wall (isothermal, Fr=17.29, Fr=7.59) and another for a different location of heated wall (windward).The results of the numerical simulation indicate that the LES performs better than RANS by accurately predict the wind flow structure at different thermal intensites and different locations of heated wall.

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Published

2014-09-15

How to Cite

A. W. Muhammad Yazid, S. M. Salim, & S. Mansor. (2014). Numerical Simulation of Thermal Atmospheric Conditions in an Idealized Street Canyon: Comparison Between RANS and LES. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 1(1), 19–27. Retrieved from https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2514