This paper describes a novel oscillatory-flow mixer consisting of a pair of flexible chambers connected by a perforated plate, or septum. During operation, the septum undergoes reciprocating motion such that the two chambers are alternately compressed and expanded. During compression, fluid is forced from one chamber to the other through the septum holes, creating an array of jets that drive the mixing process. Flow characterization within the mixer was conducted using particle image velocimetry. Tests were performed for Reynolds numbers ranging from 4 to 23,000, which encompass the creeping, laminar, and turbulent flow regimes. Results include mean and rms velocity maps, shear rate maps, vertical velocity profiles, and flow development data. The results suggest that the mixer is capable of gentle, continuous stirring (important for biological applications), as well as vigorous agitation. Finally, a comparison between this mixer and other existing mixing technologies is presented.
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e-mail: prasad@udel.edu
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February 2007
Technical Papers
Particle Image Velocimetry Evaluation of a Novel Oscillatory-Flow Flexible Chamber Mixer
Thomas N. Shipman,
Thomas N. Shipman
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19711
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Ajay K. Prasad,
Ajay K. Prasad
Department of Mechanical Engineering,
e-mail: prasad@udel.edu
University of Delaware
, Newark, DE 19711
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Scott L. Davidson,
Scott L. Davidson
ILC Dover Inc.
, One Moonwalker Road, Frederica, DE 19946
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Donald R. Cohee
Donald R. Cohee
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Thomas N. Shipman
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19711
Ajay K. Prasad
Department of Mechanical Engineering,
University of Delaware
, Newark, DE 19711e-mail: prasad@udel.edu
Scott L. Davidson
ILC Dover Inc.
, One Moonwalker Road, Frederica, DE 19946
Donald R. Cohee
J. Fluids Eng. Feb 2007, 129(2): 179-187 (9 pages)
Published Online: July 10, 2006
Article history
Received:
October 11, 2005
Revised:
July 10, 2006
Citation
Shipman, T. N., Prasad, A. K., Davidson, S. L., and Cohee, D. R. (July 10, 2006). "Particle Image Velocimetry Evaluation of a Novel Oscillatory-Flow Flexible Chamber Mixer." ASME. J. Fluids Eng. February 2007; 129(2): 179–187. https://doi.org/10.1115/1.2409347
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