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Computation 2018, 6(3), 44; https://doi.org/10.3390/computation6030044

The Hydraulic Cavitation Affected by Nanoparticles in Nanofluids

1
Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
2
Department of Energy Sciences, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
3
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Received: 4 July 2018 / Revised: 1 August 2018 / Accepted: 2 August 2018 / Published: 6 August 2018
(This article belongs to the Special Issue Computational Heat, Mass and Momentum Transfer)
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Abstract

When liquids flow through a throttling element, the velocity increases and the pressure decreases. At this point, if the pressure is below the saturated vapor pressure of this liquid, the liquid will vaporize into small bubbles, causing hydraulic cavitation. In fact, a vaporization nucleus is another crucial condition for vaporizing, and particles contained in the liquid can also work as the vaporization nuclear. As a novel heat transfer medium, nanofluids have attracted the attention of many scholars. The nanoparticles contained in the nanofluids play a significant role in the vaporization of liquids. In this paper, the effects of the nanoparticles on hydraulic cavitation are investigated. Firstly, a geometric model of a perforated plate, the throttling element in this paper, is established. Then with different nanoparticle volume fractions and diameters, the nanofluids flowing through the perforated plate are numerically simulated based on a validated numerical method. The operation conditions, such as the ratio of inlet to outlet pressures and the temperature are the considered variables. Additionally, cavitation numbers under different operating conditions are achieved to investigate the effects of nanoparticles on hydraulic cavitation. Meanwhile, the contours are extracted to research the distribution of bubbles for further investigation. This study is of interest for researchers working on hydraulic cavitation or nanofluids. View Full-Text
Keywords: nanofluids; perforated plate; hydraulic cavitation; Computational fluid dynamics nanofluids; perforated plate; hydraulic cavitation; Computational fluid dynamics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Chen, M.-R.; Qian, J.-Y.; Wu, Z.; Yang, C.; Jin, Z.-J.; Sunden, B. The Hydraulic Cavitation Affected by Nanoparticles in Nanofluids. Computation 2018, 6, 44.

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