TY - JOUR
T1 - Equation of state’s crossover enhancement of pseudopotential lattice boltzmann modeling of co2 flow in homogeneous porous media
AU - Ashirbekov, Assetbek
AU - Kabdenova, Bagdagul
AU - Monaco, Ernesto
AU - Rojas-Solórzano, Luis R.
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/12
Y1 - 2021/12
N2 - The original Shan-Chen’s pseudopotential Lattice Boltzmann Model (LBM) has continu-ously evolved during the past two decades. However, despite its capability to simulate multiphase flows, the model still faces challenges when applied to multicomponent-multiphase flows in complex geometries with a moderately high-density ratio. Furthermore, classical cubic equations of state usually incorporated into the model cannot accurately predict fluid thermodynamics in the near-critical region. This paper addresses these issues by incorporating a crossover Peng–Robinson equation of state into LBM and further improving the model to consider the density and the critical temperature differences between the CO2 and water during the injection of the CO2 in a water-saturated 2D homogeneous porous medium. The numerical model is first validated by analyzing the supercritical CO2 penetration into a single narrow channel initially filled with H2O, depicting the fundamental role of the driving pressure gradient to overcome the capillary resistance in near one and higher density ratios. Significant differences are observed by extending the model to the injection of CO2 into a 2D homogeneous porous medium when using a flat versus a curved inlet velocity profile.
AB - The original Shan-Chen’s pseudopotential Lattice Boltzmann Model (LBM) has continu-ously evolved during the past two decades. However, despite its capability to simulate multiphase flows, the model still faces challenges when applied to multicomponent-multiphase flows in complex geometries with a moderately high-density ratio. Furthermore, classical cubic equations of state usually incorporated into the model cannot accurately predict fluid thermodynamics in the near-critical region. This paper addresses these issues by incorporating a crossover Peng–Robinson equation of state into LBM and further improving the model to consider the density and the critical temperature differences between the CO2 and water during the injection of the CO2 in a water-saturated 2D homogeneous porous medium. The numerical model is first validated by analyzing the supercritical CO2 penetration into a single narrow channel initially filled with H2O, depicting the fundamental role of the driving pressure gradient to overcome the capillary resistance in near one and higher density ratios. Significant differences are observed by extending the model to the injection of CO2 into a 2D homogeneous porous medium when using a flat versus a curved inlet velocity profile.
KW - Crossover Peng-Robinson equation of state
KW - Displacement pattern and CO sequestration
KW - Pseudopotential lattice Boltzmann model
KW - Supercritical fluids
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U2 - 10.3390/fluids6120434
DO - 10.3390/fluids6120434
M3 - Article
AN - SCOPUS:85121350671
SN - 2311-5521
VL - 6
JO - Fluids
JF - Fluids
IS - 12
M1 - 434
ER -