A Three-Dimensional (3D) Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting

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Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting </title> <meta name="description" content="A Three-Dimensional (3D) Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting "> <meta name="keywords" content="street canyon, pollutant dispersion, trees, building configuration, numerical simulation, k-Epsilon EARSM"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar 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class="card-body"><strong>Paper Count:</strong> 87404</div> </div> </div> </div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">A Three-Dimensional (3D) Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bouabdellah%20Abed">Bouabdellah Abed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Bouzit"> Mohamed Bouzit</a>, <a href="https://publications.waset.org/abstracts/search?q=Lakhdar%20Bouarbi"> Lakhdar Bouarbi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to investigate numerically the effect of roof shaped on wind 铿俹w and pollutant dispersion in a street canyon with one row of trees of pore volume, Pvol = 96%. A three-dimensional computational 铿倁id dynamics (CFD) model for evaluating air 铿俹w and pollutant dispersion within an urban street canyon using Reynolds-averaged Navier鈥揝tokes (RANS) equations and the k-Epsilon EARSM turbulence model as close of the equation system. The numerical model is performed with ANSYS-CFX code. Vehicle emissions were simulated as double line sources along the street. The numerical model was validated against the wind tunnel experiment. Having established this, the wind 铿俹w and pollutant dispersion in urban street canyons of six roof shapes are simulated. The numerical simulation agrees reasonably with the wind tunnel data. The results obtained in this work, indicate that the flow in 3D domain is more complicated, this complexity is increased with presence of tree and variability of the roof shapes. The results also indicated that the largest pollutant concentration level for two walls (leeward and windward wall) is observed with the upwind wedge-shaped roof. But the smallest pollutant concentration level is observed with the dome roof-shaped. The results also indicated that the corners eddies provide additional ventilation and lead to lower traffic pollutant concentrations at the street canyon ends. <iframe src="https://publications.waset.org/abstracts/40266.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=street%20canyon" title="street canyon">street canyon</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20dispersion" title=" pollutant dispersion"> pollutant dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=trees" title=" trees"> trees</a>, <a href="https://publications.waset.org/abstracts/search?q=building%20configuration" title=" building configuration"> building configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=k-Epsilon%20EARSM" title=" k-Epsilon EARSM"> k-Epsilon EARSM</a> </p> <a href="https://publications.waset.org/abstracts/40266/a-three-dimensional-3d-numerical-study-of-roofs-shape-impact-on-air-quality-in-urban-street-canyons-with-tree-planting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40266.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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A Three-Dimensional (3D) Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting