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Modeling and simulation of droplet evaporation using a modified Cahn–Hilliard equation

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  • Lee, Hyun Geun
  • Yang, Junxiang
  • Kim, Sangkwon
  • Kim, Junseok

Abstract

In this paper, we propose a mathematical model, its numerical scheme, and some computational experiments for droplet evaporation. In order to model the evaporation, a classical Cahn–Hilliard equation with an interfacial evaporation mass flux term is proposed. An unconditionally gradient stable scheme is used to discretize the governing equation, and the multigrid method is applied to solve the resulting system. The proposed model is first validated via a proper interfacial parameter ϵ, and then, the effect of evaporation rate and effect of contact angle on volume and surface area changes are investigated. The numerical results indicate that the dynamics of evaporation are dependent on the contact angle on a solid substrate.

Suggested Citation

  • Lee, Hyun Geun & Yang, Junxiang & Kim, Sangkwon & Kim, Junseok, 2021. "Modeling and simulation of droplet evaporation using a modified Cahn–Hilliard equation," Applied Mathematics and Computation, Elsevier, vol. 390(C).
    • Handle: RePEc:eee:apmaco:v:390:y:2021:i:c:s0096300320305464
    DOI: 10.1016/j.amc.2020.125591
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    References listed on IDEAS

    as
    1. Karami, Naser & Rahimian, Mohammad Hassan & Farhadzadeh, Mohsen, 2017. "Numerical simulation of droplet evaporation on a hot surface near Leidenfrost regime using multiphase lattice Boltzmann method," Applied Mathematics and Computation, Elsevier, vol. 312(C), pages 91-108.
    2. Gros, E. & Anjos, G. & Thome, J., 2018. "Moving mesh method for direct numerical simulation of two-phase flow with phase change," Applied Mathematics and Computation, Elsevier, vol. 339(C), pages 636-650.
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