Title

Droplet impingement and breakup on a dry surface

Authors

Authors

A. Gupta;R. Kumar

Comments

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Abbreviated Journal Title

Comput. Fluids

Keywords

Lattice Boltzmann; Droplet; Impingement; Spread factor; LATTICE-BOLTZMANN MODEL; SOLID-SURFACE; IMMISCIBLE DROPLET; BUBBLE; DYNAMICS; WATER DROPS; IMPACT; SIMULATION; COLLISION; FLUIDS; FLOWS; Computer Science, Interdisciplinary Applications; Mechanics

Abstract

In this work, new results of droplet impingement and breakup have been obtained using three-dimensional lattice Boltzmann method. All four phases after impingement, the kinematic, spreading, relaxation and equilibrium phases, leading to breakup have been obtained for a range of Weber number, Reynolds number and density ratio. Conditions have been chosen such that root Re << We for comparison with available data in the literature. The maximum spread factor compares well with experiments as well as the theoretical value of 0.5 Re-0.25. At Oh < 0.15 and Capillary number, Ca < 1.0, the relaxation phase is marked by the presence of strong oscillations in the spreading diameter. An analytical solution for breakup based on the conservation of energy is provided. Criteria for three-dimensional droplet breakup have been developed as functions of Re and We. (C) 2010 Elsevier Ltd. All rights reserved.

Journal Title

Computers & Fluids

Volume

39

Issue/Number

9

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

1696

Last Page

1703

WOS Identifier

WOS:000284747100024

ISSN

0045-7930

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