Pressure drop of TiO2 nanofluid in circular pipes--颗粒学报PARTICUOLOGY

Teng, T.-P., Hung, Y.-H., Jwo, C.-S., Chen, C.-C., & Jeng, L.-Y. (2011). Pressure drop of TiO2 nanofluid in circular pipes. Particuology, 9(5), 486–491. https://doi.org/10.1016/j.partic.2011.05.001

Pressure drop of TiO₂ nanofluid in circular pipes

Tun-Ping Teng ^a *, Yi-Hsuan Hung ^a, Ching-Song Jwo ^b, Chien-Chih Chen ^c, Lung-Yue Jeng ^c

a Department of Industrial Education, National Taiwan Normal University, Taipei City 10610, Taiwan, China
b Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei City 10608, Taiwan, China
c Graduate Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei City 10608, Taiwan, China

10.1016/j.partic.2011.05.001

Volume 9, Issue 5, October 2011, Pages 486-491

Received 22 September 2009, Revised 14 January 2011, Accepted 3 May 2011, Available online 6 August 2011.

E-mail: tube.t5763@msa.hinet.net

Highlights

Abstract

This paper discusses the pressure drop in circular pipes of TiO₂/water nanofluid for both laminar and turbulent flows at different temperatures and TiO₂ weight fractions. This study shows that TiO₂/water nanofluid causes enhancement, but temperature rise reduces pressure drop. The proportional increase in pressure drop for turbulent flow is lower than that for laminar flow. The traditional equation for pressure drop fails to accurately estimate the pressure drop for laminar and turbulent flows. Accordingly, this study developed new empirical equations for the friction factor for both laminar and turbulent flows, and the maximum deviations between calculated and experimental results were reduced to within the ranges of −6.17% to 3.55% and −3.08% to 3.81%, respectively, that is, for TiO₂/water nanofluid, the correlations apply better to turbulent than to laminar flow.

Graphical abstract

Keywords

Titania (TiO₂); Nanofluid; Laminar flow; Turbulent flow

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