Numerical Investigation of Backward Facing Step Flow over Various Step Angles

被引：18

作者：

Hoi Hyun Choi ^{[1
]}

Van Thinh Nguyen ^{[1
]}

Nguyen, John ^{[2
]}

机构：

[1] Seoul Natl Univ, Dept Civil & Environm Engn, 01 Gwanak Ro, Seoul 151744, South Korea

[2] Univ Toronto, John H Daniels Fac Architecture Landscape & Desig, Toronto, ON M5T 1R2, Canada

来源：

12TH INTERNATIONAL CONFERENCE ON HYDROINFORMATICS (HIC 2016) - SMART WATER FOR THE FUTURE | 2016年 / 154卷

关键词：

Computational Fluid Dynamics; Numerical analysis; Backward facing step; OpenFOAM; RANS; LES; TURBULENT-FLOW; SIMULATION;

D O I：

10.1016/j.proeng.2016.07.508

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

In this study, based on an open source CFD package OpenFOAM we carried out a number of numerical simulations using Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches. The numerical investigation has been implemented for various step angles (10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 45 degrees, and 90 degrees), different expansion ratios (1.48, 2.00 and 3.27), and Reynolds numbers (5000, 8000, 11000, 15000, 47000 and 64000). The comparisons of the flow structures, separation flows and reattachment lengths between the numerical results and the observations show very good agreement. The results obtained from LES show a better agreement with the observations than the results obtained from RANS model. (C) 2016 The Authors. Published by Elsevier

引用

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页码：420 / 425

页数：6

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