0
Research Papers: Forced Convection

An Experimental Study on Heat Transfer Around Two Side-by-Side Closely Arranged Circular Cylinders

[+] Author and Article Information
Takayuki Tsutsui

Department of Mechanical Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 239-8686, Japantsutsui@nda.ac.jp

J. Heat Transfer 132(11), 111704 (Aug 16, 2010) (8 pages) doi:10.1115/1.4002147 History: Received December 16, 2009; Revised July 06, 2010; Published August 16, 2010; Online August 16, 2010

The present paper describes heat transfer around two side-by-side closely arranged circular cylinders. The flows around two circular cylinders in a side-by-side arrangement can be classified into three flow patterns according to the gap between the two cylinders. The heat transfer characteristics of the cylinders in each flow regime were experimentally investigated. The diameter of the circular cylinders was 40 mm and the gap between the two cylinders varied from 4 mm to 40 mm. The free stream velocity ranged from 4 m/s to 24 m/s, resulting in Reynolds nos. ranging from 1.1×104 to 6.2×104. The local heat transfer coefficient of both cylinders was measured. The overall Nusselt no. of the two cylinders was found to be minimum at G/D(=gap/diameter)=0.4, which is the minimum drag coefficient condition of the two cylinders, too.

FIGURES IN THIS ARTICLE
<>
Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Strouhal no. and three typical flow patterns

Grahic Jump Location
Figure 2

Coordinate system and notation

Grahic Jump Location
Figure 3

Experimental model and measurement system: (a) constant-heat-flux model and (b) heat transfer measurement system

Grahic Jump Location
Figure 4

Pressure measurement system

Grahic Jump Location
Figure 5

Flow visualization around the two cylinders (Re=3.1×104): (a) single cylinder, (b) G/D=0.1, (c) G/D=0.2, (d) G/D=0.3, (e) G/D=0.4, (f) G/D=0.6, and (g) G/D=1.0

Grahic Jump Location
Figure 6

Local Nusselt no. distributions: (a) single cylinder, (b) G/D=0.1, (c) G/D=0.2, (d) G/D=0.3, (e) G/D=0.4, (f) G/D=0.6, and (g) G/D=1.0

Grahic Jump Location
Figure 7

Correlation among Nuf, Nur, and the gap ratio: (a) cylinder no. 1 and (b) cylinder no. 2

Grahic Jump Location
Figure 8

Average Nusselt no. of cylinder nos. 1 and 2: (a) G/D=0.1, (b) G/D=0.2, (c) G/D=0.3, (d) G/D=0.4, (e) G/D=0.6, and (f) G/D=1.0

Grahic Jump Location
Figure 9

Average Nusselt no. of the two cylinders

Grahic Jump Location
Figure 10

Correlation between average Num and the gap ratio

Grahic Jump Location
Figure 11

Pressure coefficient distribution (G/D=0.4 and Re=4.2×104)

Grahic Jump Location
Figure 12

Drag coefficient (Re=4.2×104)

Grahic Jump Location
Figure 13

Velocity and turbulence intensity distributions behind two cylinders: (a) G/D=0.1, (b) G/D=0.2, (c) G/D=0.3, and (d) G/D=1.0

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In