期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 70, 期 -, 页码 844-850出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2013.11.066
关键词
Nanofluid; Boiling; Critical heat flux; Rayleigh Taylor instability
资金
- National Research Foundation of Korea (NRF)
- Korea government (MSIP)
Pool boiling tests were designed and performed to confirm the relation between the enhancement of critical heat flux (CHF) in nanofluids and the development of a hydrodynamic instability on the test heater surface from the deposition of nanoparticles during boiling. These pool boiling experiments were carried out under atmospheric pressure using a 0.49 mm diameter cylindrical Ni-Cr wire as a heating element with ZnO, SiO2, SiC, Al2O3, graphene oxide and CuO nanoparticles at 0.01% volume concentration. The test fluids are distilled water and R-123. The CHF value for each nanofluid is obtained and compared with the measured Rayleigh-Taylor wavelength. Higher CHF results have shorter Rayleigh-Taylor wavelengths in all cases. We propose a modified theoretical model for hydrodynamic instability that incorporates these effects and fits experimental results. (C) 2013 Elsevier Ltd. All rights reserved.
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