Large Eddy Simulation of Turbulent Flows Through Several Isosceles Triangle Ducts

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  • 二等辺三角形ダクト内乱流のラージ・エディ・シミュレーション

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<p>In this study, large eddy simulation (LES) for turbulent flows through several isosceles triangle ducts with different top angles is performed using immersed boundary (IB) method. As results of mean quantities, the streamwise velocity is the smallest in the case of regular triangle duct and increases as the top angle increases. The mean secondary flow in the cross section becomes strong at the small top angle. The turbulence energy and Reynolds stress disappear near the corner of the small acute angle. From the visualization instantaneous field, it is shown that no low-speed streak and no vortex structure appear near small acute-angle conners.</p>

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