To grate a liquid into tiny droplets by its impact on a hydrophobic microgrid
journal contribution
posted on 2023-05-18, 09:23authored byBrunet, P, Lapierre, F, Zoueshtiagh, F, Thomy, V, Merlen, A
We report on experiments of drop impacting a hydrophobic microgrid of typical spacing a few tens of micrometers. Above a threshold in impact speed, liquid emerges to the other side, forming microdroplets of size about that of the grid holes. We propose a method to produce either a monodisperse spray or a single tiny droplet of volume as small as a few picolitres corresponding to a volume division of the liquid drop by a factor of up to 105. We also discuss the discrepancy of the measured thresholds with that predicted by a balance between inertia and capillarity.
History
Publication title
Applied Physics Letters
Volume
95
Article number
254102
Number
254102
Pagination
1-3
ISSN
0003-6951
Department/School
School of Natural Sciences
Publisher
American Institute of Physics
Place of publication
Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, USA, Ny, 11747-4501