Eur. Phys. J. Appl. Phys.
Volume 91, Number 3, September 2020
Advanced Materials for Energy Harvesting, Storage, Sensing and Environmental Engineering (ICOME 2019)
|Number of page(s)||6|
|Section||Physics and Mechanics of Fluids, Microfluidics|
|Published online||23 September 2020|
Geometrically driven liquid wicking: numerical study and experimental validation★
UMR1114 EMMAH Avignon Université / INRAE,
2 Baden-Württemberg Cooperative State University Mannheim, Department of Mechanical Engineering, Coblitzalle 1-9, 68163 Mannheim, Germany
* e-mail: email@example.com
Received in final form: 13 August 2020
Accepted: 14 August 2020
Published online: 23 September 2020
Liquid film or drop wicking on solid surface without any external energy input is highly desirable in specific industrial processes. This paper proposes a numerical study of the dynamics of liquid wicking on geometrically structured flat surface. We consider structures deduced from flat surface by super-imposing a series of identical parallel channels, the ensemble being made of the same material. Channels exhibit arrow-shaped patterns. We analyse drop wicking on such a structure using numerical simulation and experiment. Both approaches reveal non symmetric wicking clearly exhibiting a privileged direction. The simulation captures the evolution of the liquid/air interface at smaller time scales and reveals wicking with rapid pulses suggested by the experiment.
© N. Abbaspour et al., EDP Sciences, 2020
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