ID 307

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

 

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.