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3rd Thermal and Fluids Engineering Conference (TFEC)

ISSN: 2379-1748

THEORETICAL DAMPED OSCILLATING MODEL OF SEGMENT SPHERICAL DROPLET ON THE SOLID FLAT

Shi Chen
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Key Laboratory for Desalination of Liaoning Province, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Dongqi Zhang
Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian 116024, China

Xiaohua Liu
Department of Building Science, Tsinghua University; Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian 116024, China

Shengqiang Shen
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Key Laboratory for Desalination of Liaoning Province, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Yaqiong Chen
Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian 116024, China

DOI: 10.1615/TFEC2018.mph.020965
pages 1735-1746


KEY WORDS: theoretical model, droplet oscillation, equilibrium radius, shear stress

Abstract

The purpose of this paper is to present a theoretical damped oscillating mathematics relationship of segment spherical droplet on solid surface between the radius, volume, kinematic viscosity, density, surface tension coefficient and contact angle of the droplet. The theoretical equilibrium radii are compared with that of the numerical results. It has been shown that the theoretical equilibrium radii are larger than that of the numerical results. In addition, the theoretical model is used to study the effects of different shear stresses on the amplitude and cycle of droplet spreading radius. It can be found that the amplitude of spreading radius decreases with the increase of shear stresses. The decay speed of spreading velocity increases with the shear stress increasing.

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