URANS simulation of 2D continuous and discontinuous gravity currents

被引：4

作者：

Eghbalzadeh, A. ^{[1
]}

Namin, M.M. ^{[2
]}

Salehi, S.A.A. ^{[1
]}

Firoozabadi, B. ^{[3
]}

Javan, M. ^{[4
]}

机构：

[1] Tarbiat Modares University, Tehran

[2] University of Tehran, Tehran

[3] Sharif University of Technology, Tehran

[4] Razi University, Kermanshah

来源：

Journal of Applied Sciences | 2008年 / 8卷 / 16期

关键词：

Navier-stokes equations; Numerical simulation; Slumping phase; Turbulence; Unsteady RANS;

D O I：

10.3923/jas.2008.2801.2813

中图分类号：

学科分类号：

摘要：

This study seeks to explore the ability of unsteady Reynolds-averaged Navier-Stokes (URANS) simulation approach for resolving two-dimensional (2D) gravity currents on fine computational meshes. A 2D URANS equations closed by a buoyancy-modified k-ε turbulence model are integrated in time with a second-order fractional step approach coupled with a direct implicit method and discretized in space on a staggered mesh using a second-order accurate finite volume approach incorporating a high resolution semi-Lagrangian technique for the convective terms. A series of 2D simulations are carried out for gravity currents from both discontinuous and continuous sources. Comparisons with experimental measurements show that 2D URANS simulations in conjunction with sufficiently high grid resolution can capture overall features of the gravity currents including the evolution of the Kelvin-Hehnholtz interfacial vortices and the propagation of the energy conserving current head with reasonable accuracy. © 2008 Asian Network for Scientific Information.

引用

页码：2801 / 2813

页数：12

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