NDLI: Mixing Characteristics in a Serpentine Micro-Channel

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chamarthy, Pramod Wereley, Steve
Copyright Year	2004
Abstract	Mixing characteristics in a 2D serpentine micro-channel were studied experimentally to understand the role of Dean vortices in enhancing mixing. Mixing plane deformation was visualized at Reynolds numbers ranging from 1 to 200 with the corresponding Dean numbers ranging from 1 to 205. The 2D serpentine micro-channel was found to be a poor mixer for Re<50 even though a strong presence of Dean vortices was observed. The generation of flow separated regions at sharp corners, above Re=100, was observed to cause a sharp increase in the mixing obtained. The interaction between the Dean vortices and the corner vortices was studied by imaging pathlines at varying depths near the sharp corners. The interaction produced rapid stretching and folding of the two fluids, which was determined to be the reason for the increased mixing at Re>100. This study will have a significant impact on the understanding of transport properties of flows in similar geometries.
Sponsorship	Fluids Engineering Division
Starting Page	253
Ending Page	261
Page Count	9
File Format	PDF
ISBN	0791847098
DOI	10.1115/IMECE2004-61902
Volume Number	Fluids Engineering
Conference Proceedings	ASME 2004 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2004-11-13
Publisher Place	Anaheim, California, USA
Access Restriction	Subscribed
Subject Keyword	Micro-mixing Μpiv Flow separation Chaotic advection Dean vortices Fluids Deformation Vortices Imaging Reynolds number Corners (structural elements) Flow (dynamics) Microchannels
Content Type	Text
Resource Type	Article

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