Investigating the effects of viscosity and density ratio on the numerical analysis of Rayleigh-Taylor instability in two-phase flow using Lattice Boltzmann method: From early stage to equilibrium state

Jalaali, Bahrul and Nasution, Muhammad Ridlo Erdata and Yuana, Kumara Ari and Deendarlianto, Deendarlianto and Dinaryanto, Okto (2021) Investigating the effects of viscosity and density ratio on the numerical analysis of Rayleigh-Taylor instability in two-phase flow using Lattice Boltzmann method: From early stage to equilibrium state. APPLIED MATHEMATICS AND COMPUTATION, 411. ISSN 0096-3003

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Abstract

The gravitational liquid-liquid two-phase flow was numerically investigated by using lattice Boltzmann method (LBM). The method was implemented for analyzing a model of Rayleigh-Taylor Instability (RTI). The feasibility of this present numerical approach was investigated by performing convergence test, and validating the obtained results with those obtained from experiments as well as other preceding numerical methods. Qualitative and quantitative comparisons were examined, whereby good agreements are noted for all cases. Parametric studies were also conducted by varying both of Reynolds and Atwood numbers to investigate the effects of viscosity and density ratio on the behavior of fluids interaction. Based on the obtained outcomes of this numerical approach, the present LBM was able to successfully simulate the complete phenomena during RTI, i.e.: the linear growth, secondary instability, bubble rising and coalescence, and liquid break-up, including turbulent mixing conditions as well as the equilibrium state. The finding obtained from this work might be beneficial in the investigation of parametric behavior in design of processes equipment such as for separator design. (C) 2021 Elsevier Inc. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Liquid-liquid two-phase flow; Rayleigh-Taylor instability; Lattice-Boltzmann method; Viscosity; Density ratio
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering > Mechanical and Industrial Engineering Department
Depositing User: Sri JUNANDI
Date Deposited: 19 Oct 2024 12:54
Last Modified: 19 Oct 2024 12:54
URI: https://ir.lib.ugm.ac.id/id/eprint/9149

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