Numerical Simulation for Drop Impact on Textured Surfaces

Baggio, Martina

doi:10.1007/978-3-030-33338-6_10

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2021

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“…More details on the numerical methods regarding e.g. the treatment of the contact angle are to be found in a previous study on the drop impact on a superhydrophobic surface with a wire 37 , 64 .…”

Section: Methodsmentioning

confidence: 99%

Air entrapment and bubble formation during droplet impact onto a single cubic pillar

Ren

Foltyn

Geppert

2021

Sci Rep

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We study the vertical impact of a droplet onto a cubic pillar of comparable size placed on a flat surface, by means of numerical simulations and experiments. Strikingly, during the impact a large volume of air is trapped around the pillar side faces. Impingement upon different positions of the pillar top surface strongly influences the size and the position of the entrapped air. By comparing the droplet morphological changes during the impact from both computations and experiments, we show that the direct numerical simulations, based on the Volume of Fluid method, provide additional and new insight into the droplet dynamics. We elucidate, with the computational results, the three-dimensional air entrapment process as well as the evolution of the entrapped air into bubbles.

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Section: Methodsmentioning

confidence: 99%