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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
INVESTIGATION ON INFLUENCE OF FORCING SCHEMES ON THEORETICAL AND SIMULATED GAS-LIQUID COEXISTENCE CURVE USING PSEUDOPOTENTIAL LATTICE BOLTZMANN METHOD
Submission Author:
Vinicius Pessoa Mapelli , SP
Co-Authors:
Vinicius Pessoa Mapelli, Luben Cabezas Gómez
Presenter: Vinicius Pessoa Mapelli
doi://10.26678/ABCM.ENCIT2020.CIT20-0457
Abstract
Multiphase flows is a research field that draws much attention for its occurence in natural and industrial processes. Modeling these flows accurately is very challenging, and in the last few decades, pseupotential framework in lattice Boltzmann method has arisen as an interesting alternative to traditional CFD simulations due to its simplicity. In the present work, a third order analysis is used to study the behavior of gas-liquid coexistence curve for a flat planar interface. Two forcing schemes, namely, Guo et al. (2002) and Shan and Chen (1993), are employed in order to verify whether simulation results are well predicted by theoretical analysis. Present work analysis was compared with literature theoretical analysis, simulation and Maxwell coexistence curve results. Current theoretical coexistence curve was able to predict simulation results within 7% of accuracy while analysis from literature deviate 86% from simulation results. No differences were observed for Guo forcing scheme. Present work was also able to predict well the coexistence curve dependence of Shan-Chen scheme on relaxation time. Although applications of such schemes may be limited, a better understanding of these schemes and good theoretical approaches are key steps in order to modify and enhance lattice Boltzmann methods to simulate wider ranges of flow conditions.
Keywords
Lattice Boltzmann method, Pseudopotential Method, Gas-Liquid Flow, flat interface
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