Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Experimental Study of the dynamics of droplet impact on the viscoelastic Substrate

Author
Department of Mechanical Engineering, Lorestan University
Abstract
Abstract: Understanding the capillary effects of liquid droplet interaction with the surface in many industrial processes such as inkjet printers, painting, spraying pesticides, etc. is of critical importance.Droplet impact on substrates has long been a key and popular subject of experimental, numerical and theoretical studies to describe phenomena involved in both nature and many industrial applications.The interest of the droplet impact on viscoelastic surfaces especially is important in many common applications, ranging from pesticide delivery on leaves to spray cooling of flexible surfaces. This study examines the impact of a drop on viscoelastic substrates with various film thicknesses. Droplet dynamic measurements during the impact in the range of Reynolds numbers between 1000 and 16000 and the Weber number to 2600, including those examined in this study. Experimental results show that the effect of substrate softness and thickness is negligible in wetting phase while this effect is significant in dewetting phase.
Keywords

Subjects


[1] Rioboo, R., Voue, M., Adao, H., Ephine Conti, J., Vaillant, A., Seveno, D., and De Coninck, J., “Drop Impact on Soft Surfaces: Beyond the Static Contact Angles”, Langmuir, Vol. 26, No. 7, pp. 4873-4879, (2010).
 
[2] Shanahan, M.E. R., and Carre, M., “Anomalous Spreading of Liquid Drops on an Elastomeric Surface”, Langmuir, Vol. 10, pp. 1647-1649, (1994).
 
[3] Shanahan, M.E. R., and Carre, M., “Viscoelastic Dissipation in Wetting and Adhesion Phenomena”, Langmuir, Vol. 11, pp. 1396-1402, (1995).
 
[4] Voue, M., Rioboo, R., Bauthier, C., Conti, J., Charlot, M., and De Coninck, J., “Dissipation and Moving Contact Lines on Non-rigid Substrates”, Journal of the European Ceramic Society, Vol. 23, pp. 2769–2775, (2003).
 
[5] Chen, L., Auernhammer, G. K., and Bonaccurso, E., “Short Time Wetting Dynamics on Soft Surfaces”, Soft Matter, Vol. 7, pp. 9084–9089, (2011).
 
[6] Karpitschka, S., Das, S., Gorcum, M., Van Perrin, H., Andreotti, B., and Snoeijer, J.H., “ Droplets Move Over Viscoelastic Substrates by Surfing a Ridge”, Nature Communications, 6:7891, ncomms 8891, (2015).
 
[7] Izbassarov, D., and Muradoglu, M., “Effect of Viscoelasticity on Drop Impact and Spreading on a Solid Surface”, Physical Review Fluids, Vol. 10, No. 023302, pp. 1-18, (2016).
 
[8] Mangili, S., Antonini, C., Marengo, M., and Amirfazli, A., “Understanding the Drop Impact Phenomenon on Soft PDMS Substrates”, Soft Matter, Vol. 8, pp. 10045-10054, (2012).
 
[9] Chen, L., Bonaccurso, E., Deng, P., and Zhang, H., “Droplet Impact on Soft Viscoelastic Surfaces”, Physical Review E, Vol. 94, 063117, (2016).
 
[10] Harris, A.K., Wild, P., and Stopak, D., “Silicon Rubber Substrate: A New Wrinkle in the Study of Cell Locomotion”, Science, Vol. 208, pp. 177–179, (1980).
 
 [11] Vhquez, G., Alvarez, E., and Navaza, J. M., “Surface Tension of Alcohol / Water from 20 to 500C”, Journal of Chemical and Engineering Data, Vol. 40, pp. 611-614, (1995).
 
[12] Thangawng, A. L., Ruoff, R. S., Swartz, M. A., and Glucksberg, M. R., “An Ultra-thin PDMS Membrane as a Bio/micro–nano Interface: Fabrication and Characterization”, Biomed Microdevices, Vol. 9, pp. 587–595, (2007).
 
[13] Ryoo, J. H., Jeong, G.S., Kang, E., and Lee, S.H., “Ultrathin, Hyperelastic PDMS Nano Membrane: Fabrication and Characterization”, 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences, Seattle, Washington, USA, (2011).
 
[14] Pasandideh-Fard, M., Qiao, Y.M., Chandra, S., and Mostaghimi, J., “Capillary Effects During Droplet Impact on a Solid Surface”, Physics of Fluids, Vol. 8, pp. 650-659, (1996).
Volume 19, Issue 2 - Serial Number 47
Fluid Mechanics and Heat Transfer
Autumn 2016
Pages 80-95

  • Receive Date 04 November 2016
  • Revise Date 25 February 2017
  • Accept Date 28 February 2017