文章基本信息

标题：Influence Study of the Entrance Channel in a Two-Dimensional Backward-Facing Step Flow
本地全文：下载
作者：Rogério Gonçalves dos Santos ; Kéteri Poliane Moraes de Oliveira ; José Ricardo Figueiredo 等
期刊名称：Mecánica Computacional
印刷版ISSN：2591-3522
出版年度：2010
卷号：XXIX
期号：33
出版社：CIMEC-INTEC-CONICET-UNL
摘要：The inﬂuence of the entrance channel in the numerical simulation of the classic two-dimensional backward-facing incompressible step ﬂow was studied. Locations of detachment and reattachment, as well as velocity proﬁle, were obtained as functions of Reynolds number. The Uniﬁed Finite Approach Exponential-type Scheme (UNIFAES) was employed in the discretization of the advective and viscous ﬂuxes of the Navier-Stokes equations in primitive variables. The almost unknown semi-staggered mesh was used. The momentum equations are integrated explicitly after the solution of a Poisson pressure that enforces mass conservation. Richardson extrapolation is employed to estimate the correct solutions. As could be expected, using the entrance channel provided better agreement with experiments than not using it, particularly for producing a non-symmetric, decentralized ﬂow proﬁle at the step plane, instead of the assumed symmetric proﬁle. Also, the size of ﬁrst bubble is smaller, and the size of the second bubble is bigger.