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Open AccessArticle

A Comparative Study of Cavitation Characteristics of Nano-Fluid and Deionized Water in Micro-Channels

by Tao Li 1,2, Bin Liu 1,*, Jinzhi Zhou 1, Wenxuan Xi 1, Xiulan Huai 1,* and Hang Zhang 1,*
1
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
2
University of Chinese Academy of Sciences, Beijing 100190, China
*
Authors to whom correspondence should be addressed.
Micromachines 2020, 11(3), 310; https://doi.org/10.3390/mi11030310
Received: 7 February 2020 / Revised: 5 March 2020 / Accepted: 12 March 2020 / Published: 16 March 2020
Hydrodynamic cavitation has been widely applied in micro-fluidic systems. Cavitating flow characteristics are closely related to the fluid properties. In this paper, the cavitation characteristics of Cu nano-fluid in micro-channels were numerically investigated and compared with those of the deionized (DI) water. The mathematical model was verified by comparing the numerical results with the experiment observation. The curved orifice (R = 0.3 mm) was found to have the highest efficiencies of cavitation for both fluids. With the increase of inlet pressure, cavitating jet lengths of the two fluids significantly increased. While, the cavitating jet length of the nano-fluid was shorter than that of the DI water at the same inlet pressure. The cavitation inception number of the DI water and nano-fluid were approximately 0.061 and 0.039, respectively. The results indicate that the nano-particles played negative effects on the cavitation inception. In addition, with the decrease of outlet pressure, the cavitation strength gradually increased and the mass flow rate remained nearly unchanged at the same time. View Full-Text
Keywords: cavitation; nano-fluid; micro-channel; numerical analysis cavitation; nano-fluid; micro-channel; numerical analysis
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MDPI and ACS Style

Li, T.; Liu, B.; Zhou, J.; Xi, W.; Huai, X.; Zhang, H. A Comparative Study of Cavitation Characteristics of Nano-Fluid and Deionized Water in Micro-Channels. Micromachines 2020, 11, 310.

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