scholarly journals EXPERIMENTS ON WATER DROP BREAKUP BEHIND MACH 3 TO 12 SHOCKS.

1969 ◽  
Author(s):  
W.G. Reinecke ◽  
W.L. McKay
Keyword(s):  
Water Drop ◽  
Drop Breakup ◽  
Mach 3

scholarly journals Investigation of mechanisms leading to water drop breakup at Mach 4.4 and Weber numbers above 105

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
David Hébert ◽  
Jean-Luc Rullier ◽  
Jean-Marc Chevalier ◽  
Isabelle Bertron ◽  
Emilien Lescoute ◽  
...  
Keyword(s):  
Water Drop ◽  
Drop Breakup

Free flight measurements of catastrophic water drop breakup

AIAA Journal ◽  
1976 ◽  
Vol 14 (11) ◽  
pp. 1635-1636 ◽  
Author(s):  
W. G. Reinecke ◽  
W. L. McKay
Keyword(s):  
Water Drop ◽  
Drop Breakup ◽  
Free Flight ◽  
Flight Measurements

A numerical study of hollow water drop breakup during freezing

2021 ◽  
Vol 33 (11) ◽  
pp. 112110
Author(s):  
Truong V. Vu ◽  
Binh D. Pham ◽  
Phuc H. Pham ◽  
Hung V. Vu ◽  
Bo X. Tran
Keyword(s):  
Numerical Study ◽  
Water Drop ◽  
Drop Breakup

Reply to “Comments on ‘Energy Dissipation During Water Drop Impact In Shallow Pools’”

1986 ◽  
Vol 50 (6) ◽  
pp. 1644-1645
Author(s):  
Alfredo G. Ferreira ◽  
Bruce E. Larock ◽  
Michael J. Singer
Keyword(s):  
Energy Dissipation ◽  
Water Drop ◽  
Drop Impact

EVALUATING STABILITY OF FOUNDATION AROUND WATER DROP WORKS WITH A HYDRAULIC-GEOTECHNICAL COMBINED METHOD

2018 ◽  
Vol 74 (5) ◽  
pp. I_655-I_660
Author(s):  
Hongxuan YANG ◽  
Yutaka FUKUMOTO ◽  
Tokuzo HOSOYAMADA ◽  
Satoru OHTSUKA
Keyword(s):  
Water Drop ◽  
Combined Method

scholarly journals Ice Coverage Induced by Depositing a Water Drop onto the Supercooled Substrate at Extreme Low Vapor Pressure

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 691
Author(s):  
Yugang Zhao ◽  
Zichao Zuo ◽  
Haibo Tang ◽  
Xin Zhang
Keyword(s):  
Vapor Pressure ◽  
Substrate Temperature ◽  
Water Drop ◽  
Industrial Processes ◽  
Aircraft Icing ◽  
Ice Coverage ◽  
Fundamental Understanding ◽  
Order Of Magnitude ◽  
The Impact ◽  
Kinetics Of

Icing/snowing/frosting is ubiquitous in nature and industrial processes, and the accretion of ice mostly leads to catastrophic consequences. The existing understanding of icing is still limited, particularly for aircraft icing, where direct observation of the freezing dynamics is inaccessible. In this work, we investigate experimentally the impact and freezing of a water drop onto the supercooled substrate at extremely low vapor pressure, to mimic an aircraft passing through clouds at a relatively high altitude, engendering icing upon collisions with pendant drops. Special attention is focused on the ice coverage induced by an impinging drop, from the perimeter pointing outward along the radial direction. We observed two freezing regimes: (I) spread-recoil-freeze at the substrate temperature of Ts = −15.4 ± 0.2 °C and (II) spread (incomplete)-freeze at the substrate temperature of Ts = −22.1 ± 0.2 °C. The ice coverage is approximately one order of magnitude larger than the frozen drop itself, and counterintuitively, larger supercooling yields smaller ice coverage in the range of interest. We attribute the variation of ice coverage to the kinetics of vapor diffusion in the two regimes. This fundamental understanding benefits the design of new anti-icing technologies for aircraft.

scholarly journals Spreading and Drying Dynamics of Water Drop on Hot Surface of Superwicking Ti-6Al-4V Alloy Material Fabricated by Femtosecond Laser

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 899
Author(s):  
Ranran Fang ◽  
Zekai Li ◽  
Xianhang Zhang ◽  
Xiaohui Zhu ◽  
Hanlin Zhang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Surface Structure ◽  
Energy Savings ◽  
Water Drop ◽  
Capillary Surface ◽  
Water Flow Velocity ◽  
Capillary Action ◽  
Practical Applications ◽  
Alloy Material ◽  
Hot Surface

A superwicking Ti-6Al-4V alloy material with a hierarchical capillary surface structure was fabricated using femtosecond laser. The basic capillary surface structure is an array of micropillars/microholes. For enhancing its capillary action, the surface of the micropillars/microholes is additionally structured by regular fine microgrooves using a technique of laser-induced periodic surface structures (LIPSS), providing an extremely strong capillary action in a temperature range between 23 °C and 80 °C. Due to strong capillary action, a water drop quickly spreads in the wicking surface structure and forms a thin film over a large surface area, resulting in fast evaporation. The maximum water flow velocity after the acceleration stage is found to be 225–250 mm/s. In contrast to other metallic materials with surface capillarity produced by laser processing, the wicking performance of which quickly degrades with time, the wicking functionality of the material created here is long-lasting. Strong and long-lasting wicking properties make the created material suitable for a large variety of practical applications based on liquid-vapor phase change. Potential significant energy savings in air-conditioning and cooling data centers due to application of the material created here can contribute to mitigation of global warming.

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