The effect of step height of microscale backward-facing step on mixed convection nanofluid flow and heat transfer characteristics

被引：64

作者：

Kherbeet, A. Sh. ^{[1
]}

Mohammed, H. A. ^{[2
]}

Munisamy, K. M. ^{[1
]}

Salman, B. H. ^{[1
]}

机构：

[1] Univ Tenaga Nas, Coll Engn, Dept Mech Engn, Jalan IKRAM UNITEN, Kajang 43000, Selangor, Malaysia

[2] Univ Teknol Malaysia, Fac Mech Engn, Dept Thermofluids, Utm Skudai 81310, Johor Bahru, Malaysia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2014年 / 68卷

关键词：

Mixed convection; Microscale backward-facing step; Heat transfer; Nanofluids; ENHANCED THERMAL-CONDUCTIVITY; FLUID-FLOW; FORCED-CONVECTION; ADJACENT; CHANNEL; MODEL;

D O I：

10.1016/j.ijheatmasstransfer.2013.09.050

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Simulation of laminar mixed convective flow over a 3-D horizontal microscale backward-Facing step (MBFS) is presented to explore the effect of step height on the flow and heat transfer characteristics. The momentum and energy equations were discretized by means of a finite volume method (FVM). The SIMPLE algorithm scheme was used to link the pressure and velocity fields in the entire domain. Three values of step height were considered S = 350 mu m, S = 450 mu m and S = 550 mu m. EG-SiO2 nanofluid was considered as the working fluid with 25 nm nanoparticle diameter, 0.04 volume fraction. The results revealed that the Nusselt number and skin friction coefficient increase with the increase of the step height. The Reynolds number and pressure drop were found to decrease with the increase of the step height. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：554 / 566

页数：13

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