Modeling of the deformation of a liquid droplet impinging upon a flat surface

AIP Publishing - Tập 5 Số 11 - Trang 2588-2599 - 1993
Jun Fukai1, Zhiguo Zhao2, Dimos Poulikakos2, Constantine M. Megaridis2, Osamu Miyatake1
1Department of Chemical Engineering Kyushu University Fukuoka 812 Japan
2Department of Mechanical Engineering, The University of Illinois at Chicago, Chicago, Illinois 60680

Tóm tắt

This article presents a theoretical study of the deformation of a spherical liquid droplet impinging upon a flat surface. The study accounts for the presence of surface tension during the spreading process. The theoretical model is solved numerically utilizing deforming finite elements and grid generation to simulate accurately the large deformations, as well as the domain nonuniformities characteristic of the spreading process. The results document the effects of impact velocity, droplet diameter, surface tension, and material properties on the fluid dynamics of the deforming droplet. Two liquids with markedly different thermophysical properties, water and liquid tin, are utilized in the numerical simulations because of their relevance in the industrial processes of spray cooling and spray deposition, respectively. The occurrence of droplet recoiling and mass accumulation around the splat periphery are standout features of the numerical simulations and yield a nonmonotonic dependence of the maximum splat radius on time.

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AIP Publishing

Tập 5 Số 11

2588-2599

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