0
TECHNICAL PAPERS

Mixed Convection From a Heated Square Cylinder to Newtonian and Power-Law Fluids

[+] Author and Article Information
A. K. Dhiman, N. Anjaiah

Department of Chemical Engineering,  Indian Institute of Technology, Kanpur 208016, India

R. P. Chhabra1

Department of Chemical Engineering,  Indian Institute of Technology, Kanpur 208016, Indiachhabra@iitk.ac.in

V. Eswaran

Department of Mechanical Engineering,  Indian Institute of Technology, Kanpur 208016, India

1

Corresponding author.

J. Fluids Eng 129(4), 506-513 (Sep 28, 2006) (8 pages) doi:10.1115/1.2436586 History: Received May 10, 2006; Revised September 28, 2006

Steady laminar mixed convection flow and heat transfer to Newtonian and power-law fluids from a heated square cylinder has been analyzed numerically. The full momentum and energy equations along with the Boussinesq approximation to simulate the buoyancy effects have been solved. A semi-explicit finite volume method with nonuniform grid has been used for the range of conditions as: Reynolds number 1–30, power-law index: 0.8–1.5, Prandtl number 0.7–100 (Pe3000) for Richardson number 0–0.5 in an unbounded configuration. The drag coefficient and the Nusselt number have been reported for a range of values of the Reynolds number, Prandtl number, and Richardson number for Newtonian, shear-thickening (n>1) and shear-thinning (n<1) fluids. In addition, detailed streamline and isotherm contours are also presented to show the complex flow field, especially in the rear of the cylinder. The effects of Prandtl number and of power-law index on the Nusselt number are found to be more pronounced than that of buoyancy parameter (Ri0.5) for a fixed Reynolds number in the steady cross-flow regime (Re30).

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematics of the flow across a square cylinder

Grahic Jump Location
Figure 2

Streamline profiles for Re=5 and 30, Ri=0.5, and Pr=1 at different values of n

Grahic Jump Location
Figure 3

Isotherm profiles for Re=5 and 30, Ri=0.5, and Pr=1 at different values of n

Grahic Jump Location
Figure 4

Streamline profiles for Re=30, for Ri=0.25, and 0.5 at different Prandtl numbers

Grahic Jump Location
Figure 5

Isotherm profiles for Re=30, for Ri=0.25, and 0.5 at different Prandtl numbers

Grahic Jump Location
Figure 6

Variation of CD and CL with Re at different Ri and Pr. The dashed line presents the results for Ri=0 case.

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