Flow and heat transfer characteristics of backward-facing step laminar flow in a rectangular duct

被引：112

作者：

Iwai, H ^{[1
]}

Nakabe, K ^{[1
]}

Suzuki, K ^{[1
]}

机构：

[1] Kyoto Univ, Dept Mech Engn, Kyoto 6068501, Japan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2000年 / 43卷 / 03期

关键词：

3-d simulation; backward-facing step; low Reynolds number; aspect ratio;

D O I：

10.1016/S0017-9310(99)00140-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Three-dimensional numerical simulation has been performed for flows over a backward-facing step at low Reynolds number in order to investigate the effects of the duct aspect ratio. Numerical results were compared with other investigations and found to agree well with experimental data. Close attention was paid to the distribution patterns of both Nusselt number and the skin friction coefficient on the bottom wall. It was found that an aspect ratio of as large as AR = 16 at least was needed to obtain a 2D region near the centerline at Re = 250. This 2D region became wider for a lower Reynolds number. It was also found that the maximum Nusselt number did not appear on the centerline but near the two side walls in every case. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：457 / 471

页数：15

共 17 条

[1] EXPERIMENTAL AND THEORETICAL INVESTIGATION OF BACKWARD-FACING STEP FLOW [J].