Curvature induced flow pattern transitions in serpentine mini-channels

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Journal titleInternational Journal of Multiphase Flow
Pages429439; # of pages: 11
Subjectserpentine channel; two-phase flow; curvature effects
AbstractExperimental investigation of the phase interactions in two-phase mini-channel serpentine systems is performed with a focus on determining the effect of radius of curvature of the serpentine on two-phase flow pattern transitions. The initial formation of two-phase flow patterns in T-junction contactors and the resulting effect on the flow through serpentine geometries are studied to predict the initiation of bubble breakup and/or coalescence in planar serpentine arrangements. Bubble breakup maps are developed for each of the serpentine geometries, identifying curvature-induced shifts in the transitions between flow patterns. Single-phase dimensionless analysis for curved geometries is extended to two-phase flow to identify the geometric dependence of critical bubble breakup. Further analysis performed shows that the characteristic length for curved geometries encountered in the Dean number for single-phase flow is suitable for capturing the effects of curvature on the initiation of bubble breakup. The dependence of Weber number on the characteristic length is reported and a critical WeCDLC=10 is identified for predicting bubble breakup inception in the serpentine system.
Publication date
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedYes
NRC number52853
NPARC number19554413
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Record identifiere29e0d21-ca0f-4809-b052-fcba45c8cb38
Record created2012-02-24
Record modified2016-05-09
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