Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijheatmasstransfer.2010.02.022
Title: Fluid flow and heat transfer in wavy microchannels
Authors: Sui, Y. 
Teo, C.J. 
Lee, P.S. 
Chew, Y.T. 
Shu, C. 
Keywords: Chaotic advection
Dean vortices
Dynamical system
Electronic cooling
Microchannel heat sinks
Poincare section
Wavy microchannels
Issue Date: Jun-2010
Source: Sui, Y.,Teo, C.J.,Lee, P.S.,Chew, Y.T.,Shu, C. (2010-06). Fluid flow and heat transfer in wavy microchannels. International Journal of Heat and Mass Transfer 53 (13-14) : 2760-2772. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijheatmasstransfer.2010.02.022
Abstract: Laminar liquid-water flow and heat transfer in three-dimensional wavy microchannels with rectangular cross section are studied by numerical simulation. The flow field is investigated and the dynamical system technique (Poincaré section) is employed to analyze the fluid mixing. The results show that when liquid coolant flows through the wavy microchannels, secondary flow (Dean vortices) can be generated. It is found that the quantity and the location of the vortices may change along the flow direction, leading to chaotic advection, which can greatly enhance the convective fluid mixing, and thus the heat transfer performance of the present wavy microchannels is much better than that of straight microchannels with the same cross section. At the same time, the pressure drop penalty of the present wavy microchannels can be much smaller than the heat transfer enhancement. Furthermore, the relative wavy amplitude of the microchannels along the flow direction may be varied for various practical purposes, without compromising the compactness and efficiency of the wavy microchannels. The relative waviness can be increased along the flow direction, which results in higher heat transfer performance and renders the temperature of the devices much more uniform. The relative waviness can also be designed to be higher at high heat flux regions for hot spot mitigation purposes. © 2010 Elsevier Ltd. All rights reserved.
Source Title: International Journal of Heat and Mass Transfer
URI: http://scholarbank.nus.edu.sg/handle/10635/60348
ISSN: 00179310
DOI: 10.1016/j.ijheatmasstransfer.2010.02.022
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

133
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

113
checked on Nov 2, 2017

Page view(s)

61
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.