https://doi.org/10.1051/epjap/2020200193
Regular Article
Geometrically driven liquid wicking: numerical study and experimental validation★
1
UMR1114 EMMAH Avignon Université / INRAE,
84914
Avignon, France
2
Baden-Württemberg Cooperative State University Mannheim, Department of Mechanical Engineering,
Coblitzalle 1-9,
68163
Mannheim, Germany
* e-mail: marie-christine.neel@inra.fr
Received:
20
June
2020
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
