Single and two-phase pressure drop in serpentine mini-channels

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Journal titleChemical Engineering and Processing: Process Intensification
Pages877884; # of pages: 8
SubjectBubble break-up; Bubble deformation; Conventional theory; Empirical correlations; Friction factors; Helical coil; Mini channels; Operating regions; Pressure differential; Pressure drop characteristic; Radius of curvature; Segmented flow; Separated flows; Serpentine configuration; Serpentine geometries; Single phase; Single- and two-phase flow; Single-phase flow; Straight channel; Two-phase pressure drops; Deformation; Flow patterns; Pressure drop; Two phase flow; Serpentine
AbstractThe pressure differential of single and two-phase flow in mini-channel serpentine geometries was investigated to determine the effects of flow patterns and radius of curvature of the serpentine on pressure drop. The friction factor for single phase flow through a straight channel was comparable to existing literature, while that in the serpentine geometry fell between conventional theory for straight channels and fully developed flow in helical coils. Extension of the single phase results to two-phase flow using a separated flow model led to the development of empirical correlations for two-phase pressure drop in the straight and serpentine configurations. Five operating regions were identified within the serpentine, each with distinct pressure drop characteristics dependent on the flow pattern and extent of bubble deformation. Two of the operating regions corresponded to bubbly and slug/unstable-annular flow, while the boundaries between the three remaining regions occurred at WeLGLC=2.7 and 15.5; corresponding to the onset of mild cap deformation and continuous bubble breakup, respectively. © 2011 Elsevier B.V.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE)
Peer reviewedYes
NPARC number21271029
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Record identifierc218a4be-0065-4ee8-a746-2a8871b6bf68
Record created2014-03-24
Record modified2016-05-09
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