THERMAL SCIENCE

International Scientific Journal

External Links

NUMERICAL INVESTIGATION OF FLUID FLOW AND HEAT TRANSFER CHARACTERISTICS IN SINE, TRIANGULAR, AND ARC-SHAPED CHANNELS

ABSTRACT
Time dependent Navier-Stokes and energy equations have been solved to investigate the fluid flow and heat transfer characteristics in wavy channels. Three different types of two dimensional wavy geometries (e.g. sine-shaped, triangular, and arc-shaped) are considered. All of them are of single wave and have same geometric dimensions. Periodic boundary conditions are used to attain fully developed flow. The flow in the channels has been observed to be steady up to a critical Reynolds number, which depends on the geometric configuration. Beyond the critical Reynolds number a self-sustained oscillatory flow has been observed. As a result of this oscillation, there is increased mixing between core and the near-wall fluids, thereby increasing the heat transfer rate. For the same geometric dimensions, flow becomes unsteady at relatively lower Reynolds number in the arc-shaped channel. .
KEYWORDS
PAPER SUBMITTED: 2006-03-13
PAPER REVISED: 2006-11-25
PAPER ACCEPTED: 2006-11-29
DOI REFERENCE: https://doi.org/10.2298/TSCI0701017H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2007, VOLUME 11, ISSUE 1, PAGES [17 - 26]
REFERENCES
  1. Nishimura, T.; Ohori, Y. and Kawamura, Y., Flow Characteristics In A Channel With Symmetric Wavy Wall For Steady Flow, J. Chem. Engg. Japan, 17 (1984), pp. 466-471.
  2. Sparrow, E. M. and Comb,J. W., Effect of Interwall Spacing and Fluid Flow Inlet Conditions on a Corrugated-Wall Heat Exchanger, Int. J. Heat Mass Transfer, 26 (1983),7.
  3. Sparrow, E. M. and Hossfeld, L.M., Effect of Protruding Edges on Heat Transfer and Pressure Drop in Duct, Int. J. Heat Mass Transfer, 27 (1984),10, pp. 1715-1722.
  4. Wang, G. and Vanka, S.P., Convective Heat Transfer in Periodic Wavy Passages, Int. J. Heat Mass Transfer, 38 (1995), 17, pp. 3219-3230.
  5. Stone K and Vanka SP: Numerical Study of Developing Flow and Heat Transfer in a Wavy Passage. Journal of Fluids Engineering (Transactions of ASME). 121 (1999), pp. 713-719.
  6. Niceno, B. and Nobile, E., Numerical Analysis of Fluid Flow and Heat Transfer in Periodic Wavy Channels, International Journal of Heat and Fluid Flow, 22 (2001), pp. 156-167.
  7. Ferziger J and Peric M: Computational Methods for Fluid Dynamics. Berlin Hedelberg: Springer Verlag, 1996.
  8. Hossain, Mohammad Zakir, Numerical Investigation of Unsteady Flow and Heat Transfer in Wavy Channels, M.Sc. Engg. Thesis, Dept. of Mechanical Engg., Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh, 2003.

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence