Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11143
Title: Control of drop impact and proposal of pseudosuperhydrophobicity using electrostatics
Authors: Pal S.
Miqdad A.M.
Datta S.
Das A.K.
Das P.K.
Published in: Industrial and Engineering Chemistry Research
Abstract: The phenomenon of droplet collision with a charged substrate is investigated numerically by a coupled electro-hydrodynamic model. A charge conservation equation and Poisson equation are solved to obtain the transient electric field. The divergence of Maxwell stress (due to the electric field) is included in the transient momentum equation as a volumetric force to couple the electrostatic force with the hydrodynamics. The interface between the two phases is tracked by volume of fluid method. The motion of the contact line on the solid substrate is controlled by concentric ring shaped charged regions. The electric stress in the vicinity of the contact line restrains its motion in the desired direction, which changes the impact behavior substantially. A hydrophilic surface shows superhydrophobic characteristics when actuated by a sufficient magnitude of electric potential. The phenomenon is analyzed with different parametric variations like electric potential, wetting nature of the substrate, and velocity of collision as it is governed by the mutual interaction between the inertia, electrostatic, and capillary forces. The present method can be used to develop engineering surfaces with tunable wetting nature. © 2017 American Chemical Society.
Citation: Industrial and Engineering Chemistry Research (2017), 56(39): 11312-11319
URI: https://doi.org/10.1021/acs.iecr.7b02036
http://repository.iitr.ac.in/handle/123456789/11143
Issue Date: 2017
Publisher: American Chemical Society
ISSN: 8885885
Author Scopus IDs: 57190672372
57192108137
57209521798
47161010300
35600687800
Author Affiliations: Pal, S., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Miqdad, A.M., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Datta, S., Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, 721302, India
Das, A.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Das, P.K., Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, 721302, India
Funding Details: Financial support of this work was received from Department of Science and Technology, India (Grant No. SB/FTP/ETA-84/2013).
Corresponding Author: Das, A.K.; Department of Mechanical and Industrial Engineering, Indian Institute of TechnologyIndia; email: akdasfme@iitr.ac.in
Appears in Collections:Journal Publications [ME]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.