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Experimental investigations of non‐Newtonian/Newtonian liquid‐liquid flows in microchannels
AIChE journal, 2017-08, Vol.63 (8), p.3599-3609
Roumpea, Evangelia
Chinaud, Maxime
Angeli, Panagiota
2017
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Roumpea, Evangelia
Chinaud, Maxime
Angeli, Panagiota
Titel
Experimental investigations of non‐Newtonian/Newtonian liquid‐liquid flows in microchannels
Ist Teil von
AIChE journal, 2017-08, Vol.63 (8), p.3599-3609
Ort / Verlag
New York: American Institute of Chemical Engineers
Erscheinungsjahr
2017
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
The plug flow of a non‐Newtonian and a Newtonian liquid was experimentally investigated in a quartz microchannel (200‐µm internal diameter). Two aqueous glycerol solutions containing xanthan gum at 1000 and 2000 ppm were the non‐Newtonian fluids and 0.0046 Pa s silicone oil was the Newtonian phase forming the dispersed plugs. Two‐color particle image velocimetry was used to obtain the hydrodynamic characteristics and the velocity profiles in both phases under different fluid flow rates. The experimental results revealed that the increase in xanthan gum concentration produced longer, bullet‐shaped plugs, and increased the thickness of the film surrounding them. From the shear rate and viscosity profiles, it was found that the polymer solution was in the shear‐thinning region while the viscosity was higher in the middle of the channel compared to the region close to the wall. Circulation times in the aqueous phase increased with the concentration of xanthan gum. © 2017 The Authors AIChE Journal published by Wiley Periodicals, Inc. on behalf of American Institute of Chemical Engineers AIChE J, 63: 3599–3609, 2017
Sprache
Englisch
Identifikatoren
ISSN: 0001-1541
eISSN: 1547-5905
DOI: 10.1002/aic.15704
Titel-ID: cdi_proquest_journals_1915361283
Format
–
Schlagworte
Circulation
,
Color
,
Dispersions
,
Flow rates
,
Fluid dynamics
,
Fluid flow
,
Glycerol
,
Image processing
,
Microchannels
,
Newtonian fluids
,
Non Newtonian fluids
,
non‐Newtonian
,
Oil
,
Particle image velocimetry
,
Plug flow
,
Plugs
,
Quartz
,
Shear rate
,
Silicones
,
Thickness
,
Thinning
,
Velocity
,
Velocity measurement
,
Viscosity
,
Xanthan
,
Xanthan gum
,
µ‐particle image velocimetry
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