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Technical Briefs

Simulation of Thermal Fluid Flow Transport in a Channel Containing Slot-Perforated Flat Plates

[+] Author and Article Information
Shuichi Torii

Department of Mechanical System Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8550, Japantorii@mech.kumamoto-u.ac.jp

Wen-Jei Yang

Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109wjyang@engin.umich.edu

J. Heat Transfer 130(11), 114506 (Sep 04, 2008) (3 pages) doi:10.1115/1.2970077 History: Received September 08, 2007; Revised April 04, 2008; Published September 04, 2008

Abstract

A numerical study is performed to investigate unsteady, two-dimensional, incompressible laminar flow over both sides of a slot-perforated flat surface in a pulsating channel flow. Consideration is given to the effects of the pulsating Strouhal number $fSr$, the Reynolds number Re, and the blockage factor, i.e., the ratio of plate thickness, $δ$, to channel width, $W$, on the heat-transfer performance and the velocity and thermal fields. It is found from the study that (i) time-averaged Nusselt number at the rear plate is amplified with Re, (ii) in contrast, the corresponding performance is attenuated with an increase in the blockage factor, whose effect becomes larger in the lower region of the Reynolds number, i.e., $Re=100$, and (iii) enhancement of the Nusselt number causes an increase in $fSr$, whose effect becomes minor near in the region of $Re=100$.

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Figures

Figure 4

Time-averaged Nusselt numbers for different pulsating Strouhal numbers, fSr, for kq=0.1

Figure 3

Time-averaged Nusselt numbers for different blockage factors, fSr=1

Figure 2

Timewise variation of Nusselt numbers at the rear plate for Re=120

Figure 1

Timewise variation of Nusselt numbers at the rear plate for Re=120

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