Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 429, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2020.110018
Keywords
Multi-component multiphase; Partial miscibility; Hydrocarbon mixtures; Pseudo-potential lattice Boltzmann models; Thermodynamic consistency; Phase behavior
Funding
- Energi Simulation
- William A. Fustos Family Professorship in Energy and Mineral Engineering at Penn State University
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This paper introduces a thermodynamically consistent multi-component, multiphase pseudo-potential lattice Boltzmann model that allows mass transfer across the phase interfaces and can predict the phase behavior of partially miscible hydrocarbon mixtures accurately. By splitting the total interaction force into individual components and deriving a force split factor associated with the volatility of each component, the model achieves precise thermodynamic consistency in multi-component hydrocarbon mixtures, as described by the iso-fugacity rule.
Current multi-component, multiphase pseudo-potential lattice Boltzmann models have thermodynamic inconsistencies that prevent them to correctly predict the thermodynamic phase behavior of partially miscible multi-component fluids, such as hydrocarbon mixtures. This paper identifies these inconsistencies and attempts to design a thermodynamically consistent multi-component, multiphase pseudo-potential lattice Boltzmann model that allows mass transfer across the phase interfaces and is capable to predict the phase behavior of typically partially miscible hydrocarbon mixtures. The designed model defines the total interaction force for the phase and split the force into individual components. Through a properly derived force split factor associated with the volatility of each component, the model can achieve precise thermodynamic consistency in multi-component hydrocarbon mixtures, which is described by the iso-fugacity rule. (C) 2020 Elsevier Inc. All rights reserved.
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