Article
Chemistry, Multidisciplinary
Yulong Yang, Tongjing Liu, Yanyue Li, Yuqi Li, Zhenjiang You, Mengting Zuo, Pengxiang Diwu, Rui Wang, Xing Zhang, Jinhui Liang
Summary: This study investigated the impact of tracer fluid flow velocity and porous medium permeability on dispersion phenomenon in core samples. Experimental data analysis revealed a linear relationship between dispersion coefficient, core permeability, and fluid velocity, demonstrating the effects of different flow conditions on tracer dispersion in porous media. These findings have implications for improving tracer flow understanding, injection parameter design, and interpretation of tracer concentration distribution in inter-well tracer tests.
APPLIED SCIENCES-BASEL
(2021)
Article
Mechanics
Neeraja Bhamidipati, Andrew W. Woods
Summary: The study investigates the longitudinal dispersion of a passive tracer in a layered permeable rock, demonstrating the significance of shear in controlling the spreading of the tracer over time.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Gerardo Severino
Summary: The study investigates the dispersion mechanism in a porous formation with steady doublet-type flow, using spatial moments to quantify the process. A simple solution is obtained by adopting simplifying assumptions, showing that dispersion in doublet-type flow is significantly larger than in single line flow.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
L. C. Auton, S. Pramanik, M. P. Dalwadi, C. W. MacMinn, I. M. Griffiths
Summary: The study explores the link between microstructure and macroscale flow and transport through the use of homogenisation theory with idealised microstructures. The research focuses on the impact of obstacle size and spacing on macroscopic properties and provides insights for designing filters or studying transport impacts in soft porous media.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
K. S. Bharath, M. R. Flynn
Summary: The experiment investigates the outflow that occurs when a dense fluid plume hits a sloping permeability jump in a two-layered porous medium, with a focus on the dynamics in the intermediate thickness case. Primary gravity currents are arrested when the volume supplied by the plume matches that lost by basal draining, leading to the formation of secondary gravity currents. As the secondary gravity currents propagate left and right, they remobilize the primary gravity currents before being impeded by the sidewall boundaries and leading to layer filling.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Water Resources
Tian Jiao, Ming Ye, Menggui Jin, Jing Yang
Summary: This study investigates whether the Finite Particle Method (FPM) can provide more accurate solutions for the advection-dispersion equation (ADE) compared to the smoothed particle hydrodynamics (SPH) method when particles are irregularly distributed. The results indicate that FPM outperforms SPH in providing accurate ADE solutions for irregularly distributed particles, but both methods are subject to numerical errors that increase with higher levels of heterogeneity. Further improvement of FPM is suggested for future studies.
ADVANCES IN WATER RESOURCES
(2021)
Article
Environmental Sciences
R. R. Yadav, Lav Kush Kumar
Summary: This study presents an analytical solution for the two-dimensional advection-dispersion equation in a semi-infinite heterogeneous porous medium, with consideration of variable coefficients and factors. The effects of various parameters on solute transport are examined through graphical illustrations of the proposed model.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Civil
Samer Majdalani, Vincent Guinot
Summary: This study investigates solute transport behavior in a Model Heterogeneous Porous Medium (MHPM) under different flow rates. Tracer experiments were conducted under stationary hydraulic conditions with 7 different flow rates. The experimental BreakThrough Curves (BTCs) exhibit a dual transport mode that is flow-rate independent, and can be accurately modeled using a classical Multi-Region Advection-Dispersion (MRAD) model with only two mobile regions. The linear dependence of the dispersion and exchange coefficients on the flow rate is confirmed over a wide range of flow conditions.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Rashmi Radha, Mritunjay Kumar Singh
Summary: A two-dimensional contaminant transport model with time-varying axial input sources subject to non-linear sorption, decay, and production was numerically solved to investigate the concentration distribution in a heterogeneous, finite soil medium. Different forms of axial input sources were considered to study their transport patterns. The model was approximated using the alternating direction implicit (ADI) and Crank-Nicolson (CN) methods, and the obtained algebraic system of equations was solved using MATLAB scripts. The results showed the influence of various hydrogeological input parameters on contaminant distribution and the stability and robustness of the proposed model.
Article
Green & Sustainable Science & Technology
Zhihong Zhao, Zihao Dou, Guihong Liu, Sicong Chen, Xianfeng Tan
Summary: This study introduces a numerical modeling framework for doublets in heterogeneous porous geothermal reservoirs. An inverse model combining an analytical solution for solute transport with global optimization method is used to calculate geometric and transport parameters of equivalent flow channels. The parameters calculated from the inverse model are then used to predict thermal breakthrough at production wells in the forward model.
Article
Environmental Sciences
Tian Jiao, Ming Ye, Menggui Jin, Jing Yang
Summary: This study develops a Decoupled Finite Particle Method with Normalized Kernel (DFPM-NK) to improve the computational accuracy of solute transport simulations. Through comparing the computational performance of several methods, it is found that DFPM-NK is more efficient than FPM with similar accuracy. Therefore, it is recommended to use DFPM-NK for computationally expensive solute transport problems.
WATER RESOURCES RESEARCH
(2022)
Article
Mechanics
Edward M. Hinton, Andrew W. Woods
Summary: The post-injection migration of a plume of CO through an inclined, confined porous layer with varying permeability is studied theoretically. The study shows that the behavior of CO at different stages can be revealed by deriving a theoretical model that takes into account various factors including permeability variation.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Physics, Applied
Dian Fan, Ronny Pini, Alberto Striolo
Summary: A study on multi-particle transport in randomly jammed packing of spheres at different particle Peclet numbers reveals a modified Nakagami-m function describing particle velocity probability distributions. The function's physical meaning lies in its ability to explain particle deposition in terms of Pe* and the competition between energy barrier distributions and particles' diffusive energy. The universality of the function is demonstrated through comparisons with simulations and experimental data.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Xin Wu, Qiao Yan, Ahmadreza Hedayat, Xuemei Wang
Summary: The study investigates the influence of concrete aggregate particle size on the propagation and attenuation of elastic waves. Results show that larger aggregate particles lead to more severe attenuation in wave amplitude, energy spectral density, and frequency, while the elastic wave spectrum center generally decreases with propagation distance.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Marco Dentz, Adama Creppy, Carine Douarche, Eric Clement, Harold Auradou
Summary: Understanding the flow and transport of bacteria in porous media is crucial for bioremediation, biomineralization, and enhanced oil recovery. Recent studies have shown that bacterial motility plays a key role in the dispersion and transport of bacteria.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Water Resources
Daniel W. Meyer
Summary: The study presents a network generation algorithm suitable for heterogeneous irregular networks, capable of emulating new networks from an existing base network with maintained connectivity, geometric properties, and spatial clustering. The generated cubical networks eliminate topological boundary effects, enabling the study of flow/transport processes at larger scales.
ADVANCES IN WATER RESOURCES
(2021)
Article
Engineering, Multidisciplinary
Yashar Mehmani, Nicola Castelletto, Hamdi A. Tchelepi
Summary: The study introduces an immersed boundary finite volume (IBM) method for simulating quasistatic contact mechanics of linearly elastic domains at small strains, including contact constraints and Newton method. It analyzes the divergence issue of the Newton method and proposes a modified solver to ensure convergence.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Sebastian B. M. Bosma, Francois P. Hamon, Brad T. Mallison, Hamdi A. Tchelepi
Summary: In subsurface multiphase flow simulations, poor performance of nonlinear solvers is a significant issue, but a new optimized scheme can greatly reduce the number of nonlinear iterations and improve efficiency.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Petroleum
I Shovkun, H. A. Tchelepi
Summary: The study aims to develop a spatial discretization scheme that cuts the matrix grid with fracture planes to model fluid flow and mechanical deformation in fractured reservoirs. It utilizes traditional formulations and numerical harmonic shape functions to accurately describe the behavior of fractured formations. The proposed approach is validated and compared with existing methods, demonstrating its feasibility and effectiveness.
Article
Water Resources
Ranit Monga, Oliver Brenner, Daniel W. Meyer, Patrick Jenny
Summary: This study developed a simplified Lagrangian approach to characterize and predict advective transport in 2-D domains with fractures. By performing Monte Carlo simulation, key correlation structures in the displacement step coordinates were identified. A correlated random walk model was derived, which accurately reproduces macrodispersion.
ADVANCES IN WATER RESOURCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Andrea Franceschini, Nicola Castelletto, Joshua A. White, Hamdi A. Tchelepi
Summary: In this paper, a family of preconditioning strategies for the contact problem in fractured and faulted porous media is presented. The strategies combine low-order continuous finite elements and piecewise constant Lagrange multipliers to simulate bulk deformation and impose frictional contact constraints. A novel jump stabilization technique is introduced to improve previous work, and scalable preconditioning strategies that exploit the block structure of the Jacobian matrix are designed. The proposed preconditioners achieve success by eliminating the Lagrange multiplier degrees of freedom and efficiently solving the pseudo-Schur complement. Numerical results demonstrate the theoretical properties, scalability, and robustness of the preconditioner, along with a comparison to other approaches in the literature.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Bazyli Klockiewicz, Leopold Cambier, Ryan Humble, Hamdi Tchelepi, Eric Darve
Summary: This paper presents a second-order accurate approach to sparsify the off-diagonal matrix blocks in solving sparse linear systems. By sparsifying the fill-in matrix blocks in block Gaussian elimination, an approximate factorization of the given matrix is computed. The new approach incorporates squared 2-norm of the incurred error in the sparsification of a matrix block, resulting in faster convergence and improved overall performance of the algorithm.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Electrochemistry
Weiyu Li, Hamdi A. Tchelepi, Yiguang Ju, Daniel M. Tartakovsky
Summary: Dendritic growth is a major cause of degradation and failure in lithium-metal batteries. This study shows that changes in the local electric field and the use of anisotropic electrolytes can suppress dendritic growth of lithium metal.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Computer Science, Interdisciplinary Applications
Ricardo H. Deucher, Hamdi A. Tchelepi
Summary: The Adaptive Implicit Method (AIM) is a technique that reduces computational costs in simulations of field scale displacements in porous media. By using a mixed implicit/explicit time discretization and high-order fluxes, AIM overcomes limitations of purely explicit approaches and improves accuracy. A new scheme is introduced that blends implicit and explicit time discretizations along with single-point upwind and a high-order flux-limited total variation diminishing approximation of numerical fluxes, resulting in reduced numerical diffusion and improved accuracy.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Water Resources
Ranit Monga, Rajdeep Deb, Daniel W. Meyer, Patrick Jenny
Summary: This study focuses on developing a Lagrangian particle-tracking scheme for modeling advective solute transport in fractured media, which overcomes the challenges faced by Eulerian transport schemes. The proposed stochastic particle-tracking scheme considers the transfer probability and conditional residence time distribution of particles, enabling the simulation of dynamic and sub-grid processes, as well as the mapping of dispersion effects and large-scale transport.
ADVANCES IN WATER RESOURCES
(2023)
Article
Computer Science, Interdisciplinary Applications
Jiawei Li, Pavel Tomin, Hamdi Tchelepi
Summary: There is an increasing interest in developing robust and efficient sequential methods for reservoir simulation. The sequential fully implicit Newton (SFIN) method addresses the slow sequential coupling convergence issue when flow and transport problems are strongly coupled. However, the original SFIN algorithm requires fixed primary variables during the simulation. In this work, strategies are proposed to handle inconsistent primary variables and extend the SFIN method to the natural black-oil formulation.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Mechanics
G. T. Bokman, L. Biasiori-Poulanges, B. Lukic, C. Bourquard, D. W. Meyer, A. Rack, O. Supponen
Summary: The dynamics of laser-induced cavitation bubbles at different distances from a rigid boundary was studied using high-speed synchrotron x-ray phase-contrast imaging. A specialized experimental chamber was designed to reduce x-ray absorption and mitigate boundary effects. The highly resolved radiographs showed clear bubble interfaces, which could be used as benchmarks for numerical simulations. The measured bubble shapes were compared to simulations using the incompressible boundary integral method. Accurate measurements of the liquid jet speed and the temporal evolution of the bubble cavity were obtained through optical access, and the results were contrasted with simulations. Splashing within the cavity resulting from the jet impact, known as Blake's splashing, was observed and characterized for certain stand-off parameters. Measurements extracted from the visualizations were validated against scaling laws and contributed to confirming and explaining the splashing phenomenon.
Article
Computer Science, Interdisciplinary Applications
Mamadou N'diaye, Francois P. Hamon, Hamdi A. Tchelepi
Summary: This work focuses on the development of a two-step field-split nonlinear preconditioner to accelerate the convergence of two-phase flow and transport in heterogeneous porous media. The proposed Field-Split Multiplicative Schwarz Newton (FSMSN) algorithm consists of a preconditioning step and a global step, achieving faster convergence compared to existing preconditioners and standard solution strategies. The impact of the upwinding scheme and the dynamic adaptation of subproblem tolerance in the preconditioning step are highlighted.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Catherine Spurin, Gareth G. Roberts, Conor P. B. O'Malley, Takeshi Kurotori, Samuel Krevor, Martin J. Blunt, Hamdi Tchelepi
Summary: Complex pore-scale dynamics during multiphase flow through porous rocks are not accounted for in large-scale models. However, we demonstrate that pressure fluctuations measured at the core-scale can reflect fluid displacements at the pore-scale. The spectral characteristics of pressure data provide information about flow dynamics, sample size, and rock heterogeneity. Understanding fluid flow in porous rocks is crucial for the safe storage of CO2 and hydrogen.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Mechanics
Guillaume T. Bokman, Luc Biasiori-Poulanges, Daniel W. Meyer, Outi Supponen
Summary: Upon interaction with underwater shock waves, bubbles can collapse and produce high-speed liquid jets in the direction of the wave propagation. This work experimentally investigates the impact of laser-induced underwater impulsive shock waves on bubbles of different sizes. The experimental results provide insights into the collapse time and jet speed of bubbles driven by impulsive shock waves as a function of the wave impulse, supporting scaling laws for their behavior.
JOURNAL OF FLUID MECHANICS
(2023)