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ID 307

Drop impact onto attached and suspended metallic meshes: liquid penetration and spreading.

Cristina Boscariol
Brighton University
United Kingdom

Dipak Sarker
Brighton University
United Kingdom

Sanjeev Chandra
University of Toronto
Canada

Cyril Crua
Brighton University
United Kingdom

Marco Marengo
Brighton University
United Kingdom

 

Abstract:

The interaction between drops and porous matter has important applications in many fields such as paint-ing, paper coating, filtration and drug delivery, the latter considering for example reconstructive surgery pro-cesses. Since the phenomenon of drop impact onto a porous surface is particularly complex, a first step consists in analysing impacts on 2D deterministic structures, such as metallic meshes. The present paper shows the cases of (i) drop impacts onto meshes attached to a solid substrate and (ii) drop impacts onto the same meshes but suspended without substrate. By analysing the impact of droplets of water, acetone and a mixture of glycerol and water on meshes with different pore sizes, three main outcomes were observed for both test cases: deposi-tion, partial imbibition and penetration. A higher amount of liquid penetration is linked to a higher velocity im-pact, lower viscosity and a larger dimension of the pore size. An estimation of the liquid penetration is given in order to evaluate the impregnation properties of the meshes. For the case of attached meshes, a map of the re-gimes is proposed.