Determination of velocity profiles of Bird-Carreau fluids in curvilinear microchannels using random sample consensus

Kyu Yoon; Hyun Wook Jung; Myung Suk Chun

doi:10.1007/s13367-020-0015-4

Determination of velocity profiles of Bird-Carreau fluids in curvilinear microchannels using random sample consensus

Kyu Yoon, Hyun Wook Jung, Myung Suk Chun

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Flow features of rheologically complex fluids inside curved microchannels should be meaningfully scrutinized for effective mixing, sorting, and manipulation of nano- and micro-sized colloids or particles. In this study, a particle streak velocimetry method with coordinate transformation is incorporated to depict experimentally the axial velocity profiles of Newtonian and non-Newtonian (Bird-Carreau, BC) fluids in a curvilinear microchannel under constant flow rate conditions. Theoretical velocity distributions for both fluids are favorably substantiated from experimental observations that employ a random sample consensus (RanSAC) algorithm under various channel geometric conditions, demonstrating the good agreement between experiments and simulations previously developed. It is confirmed that the BC fluid showed blunt and non-parabolic profiles in comparison to the Newtonian case at a low Dean number. The suggested algorithm and method for accurately observing microscale flow fields provide useful insights into the elaborate manipulation and processing of non-Newtonian fluids in curved channel devices.

Original language	English
Pages (from-to)	159-164
Number of pages	6
Journal	Korea Australia Rheology Journal
Volume	32
Issue number	2
DOIs	https://doi.org/10.1007/s13367-020-0015-4
Publication status	Published - 2020 May 1

Bibliographical note

Funding Information:
This research was supported by the KIST Institutional Program (project No. 2E29720 and No. 2E30580) provided to M.-S. Chun and by the National Research Foundation of Korea (NRF) of Korea grant (No. 2016R1A5A1009592 and No. 2017R1E1A1A01075107) provided to H.W. Jung.

Publisher Copyright:
© 2020, The Korean Society of Rheology and Springer.

Keywords

Bird-Carreau fluid
RanSAC
curved microchannel
micro flows
particle streak velocimetry

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1007/s13367-020-0015-4

Cite this

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title = "Determination of velocity profiles of Bird-Carreau fluids in curvilinear microchannels using random sample consensus",

abstract = "Flow features of rheologically complex fluids inside curved microchannels should be meaningfully scrutinized for effective mixing, sorting, and manipulation of nano- and micro-sized colloids or particles. In this study, a particle streak velocimetry method with coordinate transformation is incorporated to depict experimentally the axial velocity profiles of Newtonian and non-Newtonian (Bird-Carreau, BC) fluids in a curvilinear microchannel under constant flow rate conditions. Theoretical velocity distributions for both fluids are favorably substantiated from experimental observations that employ a random sample consensus (RanSAC) algorithm under various channel geometric conditions, demonstrating the good agreement between experiments and simulations previously developed. It is confirmed that the BC fluid showed blunt and non-parabolic profiles in comparison to the Newtonian case at a low Dean number. The suggested algorithm and method for accurately observing microscale flow fields provide useful insights into the elaborate manipulation and processing of non-Newtonian fluids in curved channel devices.",

keywords = "Bird-Carreau fluid, RanSAC, curved microchannel, micro flows, particle streak velocimetry",

author = "Kyu Yoon and Jung, {Hyun Wook} and Chun, {Myung Suk}",

note = "Funding Information: This research was supported by the KIST Institutional Program (project No. 2E29720 and No. 2E30580) provided to M.-S. Chun and by the National Research Foundation of Korea (NRF) of Korea grant (No. 2016R1A5A1009592 and No. 2017R1E1A1A01075107) provided to H.W. Jung. Publisher Copyright: {\textcopyright} 2020, The Korean Society of Rheology and Springer.",

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doi = "10.1007/s13367-020-0015-4",

language = "English",

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AU - Yoon, Kyu

AU - Jung, Hyun Wook

AU - Chun, Myung Suk

N1 - Funding Information: This research was supported by the KIST Institutional Program (project No. 2E29720 and No. 2E30580) provided to M.-S. Chun and by the National Research Foundation of Korea (NRF) of Korea grant (No. 2016R1A5A1009592 and No. 2017R1E1A1A01075107) provided to H.W. Jung. Publisher Copyright: © 2020, The Korean Society of Rheology and Springer.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Flow features of rheologically complex fluids inside curved microchannels should be meaningfully scrutinized for effective mixing, sorting, and manipulation of nano- and micro-sized colloids or particles. In this study, a particle streak velocimetry method with coordinate transformation is incorporated to depict experimentally the axial velocity profiles of Newtonian and non-Newtonian (Bird-Carreau, BC) fluids in a curvilinear microchannel under constant flow rate conditions. Theoretical velocity distributions for both fluids are favorably substantiated from experimental observations that employ a random sample consensus (RanSAC) algorithm under various channel geometric conditions, demonstrating the good agreement between experiments and simulations previously developed. It is confirmed that the BC fluid showed blunt and non-parabolic profiles in comparison to the Newtonian case at a low Dean number. The suggested algorithm and method for accurately observing microscale flow fields provide useful insights into the elaborate manipulation and processing of non-Newtonian fluids in curved channel devices.

AB - Flow features of rheologically complex fluids inside curved microchannels should be meaningfully scrutinized for effective mixing, sorting, and manipulation of nano- and micro-sized colloids or particles. In this study, a particle streak velocimetry method with coordinate transformation is incorporated to depict experimentally the axial velocity profiles of Newtonian and non-Newtonian (Bird-Carreau, BC) fluids in a curvilinear microchannel under constant flow rate conditions. Theoretical velocity distributions for both fluids are favorably substantiated from experimental observations that employ a random sample consensus (RanSAC) algorithm under various channel geometric conditions, demonstrating the good agreement between experiments and simulations previously developed. It is confirmed that the BC fluid showed blunt and non-parabolic profiles in comparison to the Newtonian case at a low Dean number. The suggested algorithm and method for accurately observing microscale flow fields provide useful insights into the elaborate manipulation and processing of non-Newtonian fluids in curved channel devices.

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KW - RanSAC

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KW - particle streak velocimetry

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Determination of velocity profiles of Bird-Carreau fluids in curvilinear microchannels using random sample consensus

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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