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Abstract of "ANALYSIS OF IMPACT OF DROPLETS ON HORIZONTAL SURFACES"

DOI: 10.1615/ICHMT.2000.TherSieProcVol2.550
134 pages

S. Sikalo
Faculty of Mechanical Engineering, University of Sarajevo, Vilsonovo setaliste 9, Bosnia/Herzegovina

Marco Marengo
Advanced Engineering Centre, School of Computing Engineering and Mathematics, Cockcroft Building, Lewes Road, University of Brighton, Brighton BN2 4GJ, UK; Department of Engineering, University of Bergamo, Viale Marconi 5, 24044 Dalmine (BG), Italy

Cameron Tropea
Technische Universität Darmstadt, Institute of Fluid Mechanics and Aerodynamics, Center of Smart Interfaces, International Research Training Group Darmstadt-Tokyo on Mathematical Fluid Dynamics, Germany

E. N. Ganic
Sarajevo School of Science and Technology, Hrasnicka cesta 3a, 71210 Ilidza – Sarajevo, Bosnia and Herzegovina

Sinopsis

This paper presents the results of experimental investigation of droplets impact on horizontal surfaces. The effects of the impact parameters on the droplet impingement is studied. The results are presented for different droplet Weber numbers, ranging from 50 to 1080 and for three liquids, water, isopropanol and glycerin. Four kinds of surfaces were used with characteristic wettability (given in terms of the contact angle), the smooth glass, PVC, wax and rough glass. We studied in some detail the kinematics of the moving contact line during of the spreading process. Particularly we are interested in the effects of the wettability of the wall by the liquid. The surface wettability has been observed to have a strong influence on the spreading of droplet in the later stages of the process. The results are presented in the form of chars describing the spreading diameter and apex height of droplets in terms of time.

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