Published 12 issues per year
ISSN Print: 1044-5110
ISSN Online: 1936-2684
Indexed in
CHARACTERISTICS OF WATER DROPLET IMPACTION BEHAVIOR ON A POLISHED STEEL HEATED SURFACE: PART I
ABSTRACT
This paper, which is in two parts, presents the results and analysis of droplet impaction on a hot stainless steel surface. Part I of this study reports the results of analysis of high-speed visualizations of droplet impaction phenomena on a hot stainless steel surface, including the characteristics of reatomized droplets that are produced at high impact Weber numbers. The investigation extends to ranges of smaller droplets and higher velocities compared with published research. Part II will then provide the results and analysis of the droplet impaction heat transfer on a hot surface. The 3.0 mm diameter flat stainless steel surface was heated to temperatures of 140°C < Tw < 400°C, and water sprays were produced from a droplet generation system based on an 80 mm diameter rotary cup. Droplet sizes in the range 20 μm < D < 160 μm were used, impacting with velocities of 5 ms−1 < U < 18 ms−1 . Previous research relevant to the topic is reviewed. Physical models for different forms of droplet breakup in different regimes are developed from the new experiments and compared with existing models. Data are presented for the droplet spreading characteristics, as well as reatomized droplet characteristics, under relatively high impact Weber number conditions (i.e., 100 < We < 750), and for different boiling regimes. These data are correlated well using equations that can be justified by physical arguments.
-
Moita Ana Sofia, Moreira António L. N., Development of empirical correlations to predict the secondary droplet size of impacting droplets onto heated surfaces, Experiments in Fluids, 47, 4-5, 2009. Crossref
-
Manglik Raj M., Jog Milind A., Molecular-to-Large-Scale Heat Transfer With Multiphase Interfaces: Current Status and New Directions, Journal of Heat Transfer, 131, 12, 2009. Crossref
-
Moreira A.L.N., Moita A.S., Panão M.R., Advances and challenges in explaining fuel spray impingement: How much of single droplet impact research is useful?, Progress in Energy and Combustion Science, 36, 5, 2010. Crossref
-
Moita A. S., Moreira A. L. N., Scaling the effects of surface topography in the secondary atomization resulting from droplet/wall interactions, Experiments in Fluids, 52, 3, 2012. Crossref
-
Liang Gangtao, Mudawar Issam, Review of drop impact on heated walls, International Journal of Heat and Mass Transfer, 106, 2017. Crossref
-
Jadidbonab Hesamaldin, Mitroglou Nicholas, Karathanassis Ioannis, Gavaises Manolis, Experimental Study of Diesel-Fuel Droplet Impact on a Similarly Sized Polished Spherical Heated Solid Particle, Langmuir, 34, 1, 2018. Crossref
-
Lubin Arnaud, Bajic Steve, Cabooter Deirdre, Augustijns Patrick, Cuyckens Filip, Atmospheric Pressure Ionization Using a High Voltage Target Compared to Electrospray Ionization, Journal of the American Society for Mass Spectrometry, 28, 2, 2017. Crossref