Evaluation of a numerical simulation model for a system coupling atmospheric gas, surface water and unsaturated or saturated porous medium

Hibi, Yoshihiko; Tomigashi, Akira; Hirose, Masafumi

doi:10.1016/j.jconhyd.2015.10.010

Cited by 5 publications

(4 citation statements)

References 24 publications

(25 reference statements)

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“…The results showed that the ASG method could precisely simulate the movement of gas and water in the atmosphere, surface water, and the porous medium, and the distribution of water saturation in the porous medium. Furthermore, we confirmed that it was possible to simulate precisely the distribution of water saturation in a trapezoidal embankment by comparing simulation results obtained by the ASG method for twophase groundwater and gas flow (Hibi et al, 2015) with those obtained by the Modified Picard (MP) simulation method developed by Celia and Bouloutas (1990). The distribution of water saturation simulated by the MP method, which is based on pressure equations and mass balance conser vation, was similar to that simulated by the ASG method.…”

Section: Introductionsupporting

confidence: 68%

“…To address ver tical and complex flows of water and gas in a surface water system and the precise distribution of water saturation in a porous medium, we earlier developed a numerical method for simulating a coupled atmospheric gas, surface water, and groundwater system that we call the ASG simulation method Tomigashi, 2015a, 2015b;Hibi et al, 2015). This simulation method employs a one-field model for multiple immiscible fluids in surface water, water saturation equations, and global pressure.…”

Section: Introductionmentioning

confidence: 99%

“…To verify the accuracy of ASG simulation method, we compared simulation results with the results of two column experiments (Hibi et al, 2015). The results showed that the ASG method could precisely simulate the movement of gas and water in the atmosphere, surface water, and the porous medium, and the distribution of water saturation in the porous medium.…”

Section: Introductionmentioning

confidence: 99%

“…2 Theory and procedure of the numerical simulation 2.1 Theory Hibi and Tomigashi (2015a,b) and Hibi et al (2015) developed the simulation method used in this study, which employs a one-field model for multiple immiscible fluids in surface water and water saturation equations for porous media.…”

Section: Introductionmentioning

confidence: 99%

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A numerical simulation model for a coupled porous medium and surface fluid system with multiphase flow

Hibi

Tomigashi²

2018

Journal of Groundwater Hydrology

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We developed a numerical method (ASG method) for simulating a coupled atmospheric gas-surface water system, simulated by Navier-Stokes equations, and groundwater system, simulated by water saturation equations. Here, we derived dimensionless formulas for ASG method to avoid the influence of a dimension of analytical domain, in this study. Further we used the ASG method to simulate the configuration and movement of the infiltration front in an embankment composed of sand and obtained results similar to those obtained by a water tank experiment in another study. In addition, in a practice problem using non-dimensional values, we simulated the movement of gas and water when surface water flowed over an embankment expressed in dimensionless form.Consequently the ASG method could simulate the movement of water and gas across the interface between a surface system and a porous medium including the practice embankment.

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Section: Introductionsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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