Numerical investigation of the pseudopotential lattice Boltzmann modeling of liquid–vapor for multi-phase flows

Maedeh Nemati, Ali Reza Shateri Najaf Abady, Davood Toghraie and Arash Karimipour

Physica A: Statistical Mechanics and its Applications, 2018, vol. 489, issue C, 65-77

Abstract: The incorporation of different equations of state into single-component multiphase lattice Boltzmann model is considered in this paper. The original pseudopotential model is first detailed, and several cubic equations of state, the Redlich–Kwong, Redlich–Kwong–Soave, and Peng–Robinson are then incorporated into the lattice Boltzmann model. A comparison of the numerical simulation achievements on the basis of density ratios and spurious currents is used for presentation of the details of phase separation in these non-ideal single-component systems. The paper demonstrates that the scheme for the inter-particle interaction force term as well as the force term incorporation method matters to achieve more accurate and stable results. The velocity shifting method is demonstrated as the force term incorporation method, among many, with accuracy and stability results. Kupershtokh scheme also makes it possible to achieve large density ratio (up to 104) and to reproduce the coexistence curve with high accuracy. Significant reduction of the spurious currents at vapor–liquid interface is another observation. High-density ratio and spurious current reduction resulted from the Redlich–Kwong–Soave and Peng–Robinson EOSs, in higher accordance with the Maxwell construction results.

Keywords: Lattice Boltzmann method; Pseudopotential model; Equation of state; Single-component multi-phase (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (18)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:489:y:2018:i:c:p:65-77

DOI: 10.1016/j.physa.2017.07.013

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