1 Laboratory of Interfaces and Advanced Materials (L. A. M. I), faculty of sciences of Monastir - University of Monastir - Tunisia
2 Laboratory of thermal and energizing system studies, (L. E. S. T. E), National Engineering School of Monastir (E. N. I. M), University of Monastir - Tunisia, Avenue de l’Environnement 5019 Monastir Tunisie
This paper presents an experimental study of impact of water drop on a surface in a spreading regime with no splashing. Three surfaces were studied: virgin glass, coating film and woven cotton fabric at different construction parameters. All experiments were carried out using water drop with the same free fall high. Digidrop with high-resolution camera is used to measure the different parameters characterising this phenomenon. Results show an important effect of the height of the free fall on the drop profile and the spreading behaviour. An important drop deformation at the surface impact was observed. Then, fabric construction as the weft count deeply affects the drop impact. For plain weave, an increase of weft count causes a decrease in penetration and increase in the spreading rate. The same result was obtained for coated fabric. Therefore, the impact energy was modified and the drop shape was affected, which directly influenced the spreading rate.
 Cassie, A. B. D. (1948). Contact Angles. Faraday Discussions, 3, 11-16.
 De Gennes, P. G. (1986). Deposition of Langmuir-Blodgett layers. Journal of Colloid Polymer and Science, 264(5), 463-465.
 Gillespie, T. (1958). The spreading of low vapor pressure liquids in paper, Journal of Colloid Interface and Science, 13, 32-50.
 Good, R. J. (1952). A Thermodynamic Derivation of Wenzel’s Modification of Young’s Equation for Contact Angles; Together with a Theory of Hysteresis, Journal of the American Chemical Society, 74(20), 5041-5042.
 Karbowiak, T., Debeaufort,F., Champion,D., Voilley,A. (2006). Wetting properties at the surface of iota-carrageenan-based edible films. Journal of Colloid Interface and Science, 294(2), 400-410.
 Leidenfrost, J. G. (1966). On the fixation of water in diverse fire. International Journal of Heat and Mass Transfer, 9, 1153-1166.
 Marengo, M., Tropea, C. (1999). Aufprall von Tropfen auf Flüssigkeitsfilme. DFG, Zwischenbericht zum Forschungsvorhaben, Tr. 194/10.
 Mundo,C., Sommerfeld,M., Tropea,C. (1995). Droplet-wall collisions: Experimental studies of the deformation and breakup process. International Journal of Multiphase Flow, 21, 151-173.
 Mundo,C., Sommerfeld,M., Tropea,C. (1994). Experimental studies of the deposition and splashing of small liquid droplet impinging on a fiat surface. Proceeding ICLASS, Rouen, France.
 Rioboo, R., Tropea, C., Marengo, M. (2001). Outcomes from a drop impact on solid surfaces. At. Sprays, 11, 155-165.
 Scheller, B. L., Bousfield, D. W. (1995). Newtonian drop impact with a solid surface. Journal of Amerian Istitute of Chemical Engineers, 41(6), 1357-1367.
 Šikalo, Š., Marengo, M., Tropea, C., Ganic, E. N. (2002). Analysis of impact of droplets on horizontal surfaces. Experimental Thermal and Fluid Science, 25(7), 503-510.
 Stow, C. D., Hadfield, M. G. (1981). An experimental investigation of fluid flow resulting from the impact of a water drop with an unyielding dry surface. Proceeding of the Royal Society of London 373, 419-441.
 Vander Wal, R. L., Berger, G. M, Mozes, S. D. (2006). The splash/non-splash boundary upon a dry surface and thin fluid film. Experiments in Fluids, 40, 53-59.
 Washburn, E. W. (1921). The Dynamics of Capillary Flow. Physical Review 17 (3), 273-283.
 Wenzel, R. N. (1936). Resistance of solid surfaces to wetting by water. Industrial and Engineering Chemistry, 28, 988-994.
 Worthington, A. M. (1876). A second paper on the forms assumed by drop of liquids falling vertically on a horizontal plate. Proceeding of the Royal Society of London, 25, 489-503.
 Young, T. (1805) An Essay on the cohesion of fluids. Philosophy Transactions of Royal Society of London Serie A, 95, 65-87.
 Zhang, X., Basaran, O. A. (1997). Dynamic surface tension effects in impact of a drop with a solid surface. Journal of Colloid Interface Science, 187(1), 166-178.