انجمن هیدرولیک ایران نشریه علمی هیدرولیک 2345-4237 7 3 2012 10 22 Application of Near-wall Models Along with LES to Free Surface and Separated Flows کاربرد مدلهای کنار جداره در شبیه سازی جریانهای سطح آزاد جدا شده به روش LES 43 54 85348 10.30482/jhyd.2012.85348 FA حمید شاملو دانشگاه خواجه نصیر حسین بزرگیان نغمه پیشگو سینا تقی زاده Journal Article 2012 03 20 Application of Near-wall models along with large eddy simulation method for free-surface flow over<br />backward-facing step is investigated. Smagorinsky and Dynamic sub-grid scale models are used in<br />LES code. Four different near-wall models have been developed based on advanced Werner-Wengle<br />model. The simulation results are compared with experimental data of Nakagawa and Nezu (1987).<br />The comparison shows a relatively good agreement for time-averaged velocities and also it shows<br />high accuracy in computation of reattachment point. Near-wall models have very close results in<br />whole domain except the reattachment region and this has been shown by comparison of viscose sublayer<br />thickness that is an important parameter of these models. Although the dynamic sub-grid scale<br />model is more complicated than standard model, both models have shown very close results in present<br />case study. https://jhyd.iha.ir/article_85348_4615fce1c79287b3eb4405ab878bbed6.pdf