@article{article_498137, title={A Numerical Analysis on the Effect of Turbulent Schmidt Number on Numerical Prediction of Pollutant Dispersion within Street Canyons}, journal={The Eurasia Proceedings of Science Technology Engineering and Mathematics}, pages={230–240}, year={2018}, author={Abed, Bouabdellah and Benzerdjeb, Abdelouahab and Hamıdou, Mohamed-kamel}, keywords={Turbulence schmidt number,CFD simulation,Pollutant dispersion,Street canyons}, abstract={<p> <span style="font-size:10.0pt;line-height:115%; font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-US;mso-fareast-language:FR;mso-bidi-language:AR-SA">This paper presents a numerical analysis on the effect of turbulent Schmidt number on numerical prediction of pollutant dispersion within street canyons. Four cases of idealised-2D street canyons were simulated with several modifications to buildings geometry. The <i>k – ε </i> </span> <span style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: Calibri;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language: AR-SA"> </span> <span style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: FR;mso-bidi-language:AR-SA">and <i>RNG </i> <i>k – ε </i> </span> <span style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-ansi-language:EN-US;mso-fareast-language: AR-SA;mso-bidi-language:AR-SA"> </span> <span style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:FR;mso-bidi-language: AR-SA"> turbulence closure models have been adopted for turbulence modeling and the accuracy of numerical predictions has been examined by comparing calculated results with the available wind-tunnel measurements. The simulation results showed that the turbulent Schmidt number is a range of <i>0.1 </i> to <i>1.3 </i> that has some effect on the prediction of pollutant dispersion in the street canyons. For each street canyon configuration, an optimum value for turbulent Schmidt number was determined which gives good agreement with the experimental results. In the case of a flat roof canyon configuration (case-00), appropriate turbulent Schmidt number of <i>0.6 </i> is estimated using the <i>k – ε </i> </span> <span style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-ansi-language:EN-US;mso-fareast-language: AR-SA;mso-bidi-language:AR-SA"> </span> <span style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:FR;mso-bidi-language: AR-SA">model and of <i>0.5 </i> using the <i>RNG </i> <i>k – ε </i> </span> <span style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-ansi-language:EN-US;mso-fareast-language: AR-SA;mso-bidi-language:AR-SA"> </span> <span style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:FR;mso-bidi-language: AR-SA">. </span> <br> </p>}, number={4}, publisher={ISRES Publishing}