Operating ranges of gas-liquid capillary microseparators: experiments and theory
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
An experimental and theoretical study of capillary gas/liquid phase microseparators is presented. The device studied comprises a main microchannel with a set of capillaries fabricated to each side so that the liquid (wetting) phase can be separated from the gas (non-wetting) phase due to capillary effects. Different units are employed with different characteristics of capillaries (constant or tapered cross-sectional area and capillary size). We study how complete separation depends on the externally controlled pressure difference at the liquid and the gas outlet and how separation is affected by the imposed inlet flow rate. The results demonstrate that the operability pressure window becomes narrower as the fluid flow rates increase, and reveal discrepancies with theoretical predictions based on a simple Hagen–Poiseuille formulation. This is addressed by a new equation that takes into account interface curvature effects, and is found to be in qualitative agreement with the experimental results. In addition, we perform CFD simulations observing the emergence of interface breaking at high flow rates.
Date Issued
2014-07-26
Date Acceptance
2014-04-15
Citation
Chemical Engineering Science (CES), 2014, 114, pp.30-39
ISSN
0009-2509
Publisher
Elsevier
Start Page
30
End Page
39
Journal / Book Title
Chemical Engineering Science (CES)
Volume
114
Copyright Statement
© 2014 Elsevier Ltd. All rights reserved.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000337875200004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
Engineering
Engineering, Chemical
FLOW
Microfluidic
Microstructure
Multiphase flow
PRESSURE-DROP
Science & Technology
SEPARATION
Separations
Technology
Publication Status
Published
Date Publish Online
2014-04-23