Droplet impingement and breakup on a dry surface

    Authors

    A. Gupta;R. Kumar

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    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

    Share

    COinS