Initial coalescence of a drop at a planar liquid surface

Qindan Zhang, Xiaofeng Jiang, David Brunello, Taotao Fu, Chunying Zhu, Youguang Ma, and Huai Z. Li
Phys. Rev. E 100, 033112 – Published 20 September 2019

Abstract

The initial coalescence of a pendant drop at bulk liquid was jointly investigated by an ultrahigh-speed DC electrical device, a high-speed camera, and a fast micro-Particle Image Velocimetry (micro-PIV). Extended to highly viscous non-Newtonian liquids, the variation of the coalescing width vs time confirms the distinct regimes reported for drop-drop configuration: linear in the inertially limited viscous regime; square root in the inertial regime; possibly a transient viscous regime in between with a logarithmic correction. The measured flow fields during coalescence reveal the transformation of surface energy to kinetic energy, so that the highly located inertia could play a dominant role in relation to the viscous force.

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  • Received 17 April 2019
  • Revised 29 May 2019

DOI:https://doi.org/10.1103/PhysRevE.100.033112

©2019 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Qindan Zhang1,2, Xiaofeng Jiang1, David Brunello1, Taotao Fu2, Chunying Zhu2, Youguang Ma2, and Huai Z. Li1,*

  • 1Laboratory of Reactions and Process Engineering, CNRS, University of Lorraine, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France
  • 2State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

  • *Huai-Zhi.Li@univ-lorraine.fr

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Vol. 100, Iss. 3 — September 2019

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