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Title: Experimental investigation on the phenomena around the onset nucleate boiling during the impacting of a droplet on the hot surface

Abstract

Onset of nucleate boiling of a droplet when impacted onto hot surface was investigated. Three kinds of surfaces, normal stainless steel (NSS), stainless steel with TiO{sub 2} coating (UVN), and stainless steel with TiO{sub 2} coating and radiated by ultraviolet ray were employed to examine the effect of wettability. The droplet size was 2.4 mm diameter, and dropped under different We number. The image is generated by high speed camera with the frame speed of 1000 fps. The boiling conditions are identified as natural convection, nucleate boiling, critical heat flux, transition, and film boiling. In the present report, the discussion will be focused on the beginning of nucleate boiling on the droplet. Nucleate boiling occurs when bubbles are generated. These bubbles are probably caused by nucleation on the impurities within the liquid rather than at nucleation sites on the heated surface because the bubbles appear to be in the bulk of the liquid instead of at the liquid-solid interface. In addition, the smaller the contact angle, the fastest the boiling.

Authors:
 [1];  [2]; ; ;  [3];  [2];  [4]
  1. Graduate Program at Mechanical Engineering, Engineering Faculty, Gadjah Mada University, Jl. Grafika No. 2 Yogyakarta 55281 (Indonesia)
  2. (Indonesia)
  3. Mechanical and Industrial Department, Engineering Faculty, Gadjah Mada University, Jl. Grafika No. 2 Yogyakarta 55281 (Indonesia)
  4. Refrigeration and Airconditioning Department, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ds. Ciwaruga Kotak Pos 1234 Bandung (Indonesia)
Publication Date:
OSTI Identifier:
22608927
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1737; Journal Issue: 1; Conference: 3. AUN/SEED-NET regional conference on energy engineering, Yogyakarta (Indonesia), 19-20 Nov 2015, RCENE/THERMOFLUID 2015: 7. international conference on thermofluids, Yogyakarta (Indonesia), 19-20 Nov 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRITICAL HEAT FLUX; DROPLETS; FILM BOILING; FILMS; IMAGES; IMPURITIES; INTERFACES; LIQUIDS; NATURAL CONVECTION; NUCLEATE BOILING; NUCLEATION; SOLIDS; STAINLESS STEELS; SURFACES; TITANIUM OXIDES; ULTRAVIOLET RADIATION; VELOCITY; WETTABILITY

Citation Formats

Mitrakusuma, Windy H., E-mail: windyhm@polban.ac.id, Refrigeration and Airconditioning Department, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ds. Ciwaruga Kotak Pos 1234 Bandung, Deendarlianto,, Kamal, Samsul, Indarto, Centre for Energy Studies, Gadjah Mada University, Sekip K-1A Kampus UGM, Yogyakarta 55281, and Nuriyadi, M.. Experimental investigation on the phenomena around the onset nucleate boiling during the impacting of a droplet on the hot surface. United States: N. p., 2016. Web. doi:10.1063/1.4949305.
Mitrakusuma, Windy H., E-mail: windyhm@polban.ac.id, Refrigeration and Airconditioning Department, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ds. Ciwaruga Kotak Pos 1234 Bandung, Deendarlianto,, Kamal, Samsul, Indarto, Centre for Energy Studies, Gadjah Mada University, Sekip K-1A Kampus UGM, Yogyakarta 55281, & Nuriyadi, M.. Experimental investigation on the phenomena around the onset nucleate boiling during the impacting of a droplet on the hot surface. United States. doi:10.1063/1.4949305.
Mitrakusuma, Windy H., E-mail: windyhm@polban.ac.id, Refrigeration and Airconditioning Department, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ds. Ciwaruga Kotak Pos 1234 Bandung, Deendarlianto,, Kamal, Samsul, Indarto, Centre for Energy Studies, Gadjah Mada University, Sekip K-1A Kampus UGM, Yogyakarta 55281, and Nuriyadi, M.. Fri . "Experimental investigation on the phenomena around the onset nucleate boiling during the impacting of a droplet on the hot surface". United States. doi:10.1063/1.4949305.
@article{osti_22608927,
title = {Experimental investigation on the phenomena around the onset nucleate boiling during the impacting of a droplet on the hot surface},
author = {Mitrakusuma, Windy H., E-mail: windyhm@polban.ac.id and Refrigeration and Airconditioning Department, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ds. Ciwaruga Kotak Pos 1234 Bandung and Deendarlianto, and Kamal, Samsul and Indarto and Centre for Energy Studies, Gadjah Mada University, Sekip K-1A Kampus UGM, Yogyakarta 55281 and Nuriyadi, M.},
abstractNote = {Onset of nucleate boiling of a droplet when impacted onto hot surface was investigated. Three kinds of surfaces, normal stainless steel (NSS), stainless steel with TiO{sub 2} coating (UVN), and stainless steel with TiO{sub 2} coating and radiated by ultraviolet ray were employed to examine the effect of wettability. The droplet size was 2.4 mm diameter, and dropped under different We number. The image is generated by high speed camera with the frame speed of 1000 fps. The boiling conditions are identified as natural convection, nucleate boiling, critical heat flux, transition, and film boiling. In the present report, the discussion will be focused on the beginning of nucleate boiling on the droplet. Nucleate boiling occurs when bubbles are generated. These bubbles are probably caused by nucleation on the impurities within the liquid rather than at nucleation sites on the heated surface because the bubbles appear to be in the bulk of the liquid instead of at the liquid-solid interface. In addition, the smaller the contact angle, the fastest the boiling.},
doi = {10.1063/1.4949305},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1737,
place = {United States},
year = {2016},
month = {6}
}