Article
Environmental Sciences
Yue Yuan, Xiaobing Chen, M. Bayani Cardenas, Xiaofeng Liu, Li Chen
Summary: The interaction between flow and vegetation plays a significant role in affecting fluid dynamics and material transport in river corridors. This study conducted numerical models to investigate vegetation-induced hyporheic exchange and found that vegetation can increase hyporheic flux through relatively shallower exchange zones compared to bedform-induced flow. The results were synthesized into predictive models for hyporheic flux, bulk residence time, and exchange depth based on drag coefficient, vegetation density, and Reynolds Number.
WATER RESOURCES RESEARCH
(2021)
Article
Engineering, Civil
Phong V. V. Le, Saubhagya S. Rathore, Scott L. Painter
Summary: The transport of solutes in stream corridors is controlled by bulk movement in the stream channel and mass exchange with the hyporheic zone. Modeling solute transport in stream corridors under dynamic hydrological conditions remains a scientific challenge. In this study, a steady-state Lagrangian multiscale river-corridor transport model was extended to accommodate unsteady flow and evaluated with field observations.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
S. H. Huang, J. Q. Yang
Summary: In this study, the impact of a channel-spanning porous log jam on hyporheic flow was investigated through direct visualization and theoretical analysis. The results showed that the log jam-induced hyporheic flux was dependent on the Froude number, and the log jam also affected the water surface and turbulent kinetic energy.
WATER RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Kevin R. Roche, Marco Dentz
Summary: The reaction rates in the hyporheic zone vary vertically and lead to unexpected reaction kinetics for solutes in streams. Deeper, low-reactivity locations within the hyporheic zone retain solutes for extended periods, causing higher solute concentrations in the stream reach than predicted by classical models. The time scales of transport and reaction within the biolayer control solute retention and transformation at the stream scale.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Sung Hyun Jung, Jun Song Kim
Summary: This study quantifies the impact of hyporheic exchange on solute residence times by simulating solute transport in turbulent open-channel and hyporheic zone systems. The results show that hyporheic flow is a dominant driver of non-Fickian transport in surface water and that increasing Reynolds number leads to longer solute residence times and greater solute spreading. The findings suggest that understanding hyporheic flow dynamics is crucial for managing water resources and pollutant transport in rivers.
Article
Environmental Sciences
Guangchen Shen, Junlin Yuan, Mantha S. Phanikumar
Summary: In this study, direct numerical simulation (DNS) results of hyporheic exchange on a flat river bed with different particle roughness textures are reported. The transit time distributions (TTDs), subsurface flow patterns, and interfacial volumetric fluxes were discussed. The results showed that bed roughness induced deep subsurface flow paths and affected transit times. The study also considered the impact of molecular diffusion on transit times. This work demonstrates the significant hyporheic exchange induced by particle roughness on a macroscopically flat sediment bed.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Yan Ping Lian, Jonathan Dallmann, Benjamin Sonin, Kevin R. Roche, Aaron Packman, Wing Kam Liu, Gregory J. Wagner
Summary: The study investigates turbulent hyporheic exchange and porewater transport over and through a rough bed of spheres using large eddy simulation (LES). The results show that the interaction between large-scale freestream structures and vortices at the surfaces of individual spheres control turbulent momentum fluxes into the bed, with the transition between turbulent flow and Darcy flow occurring over the first row of spheres.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Wenguang Shi, Hongbin Zhan, Quanrong Wang, Xianjun Xie
Summary: A novel two-dimensional closed-form analytical solution for heat transport with vertical and nonvertical flow components was presented for the first time using Green's function method in this study. The new model was tested using field data and showed significant impact of nonvertical flow component on heat transport in streambed.
WATER RESOURCES RESEARCH
(2023)
Article
Nuclear Science & Technology
Somboon Rassame, Takashi Hibiki
Summary: This study developed an equation to predict the turbulent diffusion terms in the one-dimensional Interfacial Area Transport Equation (IATE) for bubbly flow in vertical round channels. The predictive capability of the developed equation was validated with experimental data, and satisfactory agreement was achieved.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Yufei Wang, Daniel Fernandez-Garcia, Maarten W. Saaltink
Summary: This paper presents a reactive multi-component multi-phase flow program, MRST_CO2, implemented in Matlab Reservoir Simulation Toolbox (MRST), for simulating Geological Carbon Sequestration (GCS). The program can simulate multi-phase flow and transport of species undergoing chemical reactions and mass exchanges among gas, liquid, and solid phases. It has been tested with 1D benchmark and applied to heterogeneous 2D and 3D cases with structured or unstructured grid.
COMPUTERS & GEOSCIENCES
(2023)
Article
Mechanics
Umesh Unnikrishnan, Hongfa Huo, Xingjian Wang, Vigor Yang
Summary: This paper presents a systematic investigation of large eddy simulation (LES) and subgrid scale (SGS) modeling with application to transcritical and supercritical turbulent mixing and combustion. It highlights the uncertainty in extending LES formalism to high-pressure real-fluid flows and reexamines the theoretical framework and assumptions in the context of real-fluid mixing and combustion.
Article
Thermodynamics
Yang Liu, Jiatong Liu, Shu Li, Guohui Li, Lixing Zhou
Summary: A new particle subgrid scale model is proposed to consider the effect of gas flow on particle motions. A second-order moment two-phase turbulence model is used to model multiphase gas-particle turbulent flow, with a four-way coupling strategy to describe the interactions among gas-particle, particle-gas, and particle-particle collisions. Results show that predictions are well agreed with experimental data, and there are significant differences in vortex structures and distributions between gas and particle flow in swirling and non-swirling conditions.
Review
Thermodynamics
Li Chen, An He, Jianlin Zhao, Qinjun Kang, Zeng-Yao Li, Jan Carmeliet, Naoki Shikazono, Wen-Quan Tao
Summary: This review summarizes the recent advances and challenges in pore-scale modeling, discussing its practical applications in geoscience, polymer exchange membrane fuel cells, and solid oxide fuel cells. Notable results from pore-scale modeling are presented, while the challenges facing the development of pore-scale models are also discussed.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2022)
Article
Mechanics
Chuanshuai Dong, Ronghui Qi, Lizhi Zhang
Summary: This study developed a mechanistic model of flow and heat transfer in two-phase gas-liquid stratified flow to improve understanding of its fluid dynamics and heat transfer. Through investigating the effects of different flow geometries and parameters on heat transfer, a simple correlation of the heat transfer multiplier was proposed for predicting the heat transfer performance.
Article
Environmental Sciences
Nicolas Seigneur, Adrien Socie, K. Ulrich Mayer
Summary: Reactive transport modeling is widely used to understand hydrogeochemical processes. The scope of applications has increased towards higher complexity and process coupling. Traditional methods have limitations in decoupling groundwater flow and reactive transport processes. A global implicit compositional approach is presented to integrate flow processes into the reactive transport framework, solving the limitations of traditional methods. The model allows tackling complex problems while accounting for various reactions involving water, gases, and solids.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Yalan Song, Yuncheng Xu, Hassan Ismail, Xiaofeng Liu
Summary: This paper introduces a new three-dimensional scour model, ibScourFoam, based on an immersed boundary method, capable of handling scour around complex structures. A special wall function was developed to address the non-smoothness problem of wall shear stress in previous methods, ensuring accurate simulation of scour processes. The model was validated against literature cases and a flume experiment, successfully capturing the distinct stages of scour and the complex process of undermining and exposing buried structures.
COASTAL ENGINEERING
(2022)
Article
Environmental Sciences
Anzy Lee, Antoine F. Aubeneau, M. Bayani Cardenas, Xiaofeng Liu
Summary: The study investigates the impact of cobble clusters embedded in a sand bed on water flow and exchange. Results show that the spacing and embeddedness of cobbles affect hyporheic exchange, with increased exchange and longer travel time when cobbles protrude more into the channel.
WATER RESOURCES RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Bochao Xu, M. Bayani Cardenas, Isaac R. Santos, William C. Burnett, Matthew A. Charette, Valenti Rodellas, Sanzhong Li, Ergang Lian, Zhigang Yu
Summary: Radium isotopes are important tools in oceanography and hydrology research. Current radium mass balance models often overlook the impact of particle scavenging on dissolved radium removal. We built a global ocean Ra-226 mass balance model and reevaluated the importance of particle scavenging. Our study found that particle scavenging is the major pathway for Ra-226 removal in the upper ocean.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Civil
Lichun Wang, M. Bayani Cardenas, Tiejun Wang, Jia-Qing Zhou, Lizhi Zheng, Yi-Feng Chen, Xi Chen
Summary: The onset of Forchheimer flow in porous media is determined by the critical hydraulic gradient which scales with permeability, but the relationship may change at low permeability due to other flow processes. Further investigations are needed to understand the uncertainties in the power law relationship.
JOURNAL OF HYDROLOGY
(2022)
Review
Engineering, Civil
Yong G. Lai, Xiaofeng Liu, Fabian A. Bombardelli, Yalan Song
Summary: This article reviews the basic theory and current state of 3D local scour models, focusing on sediment solvers, and discusses future research needs.
JOURNAL OF HYDRAULIC ENGINEERING
(2022)
Article
Engineering, Marine
Yalan Song, Seyedeh Azadeh Mousavi Darzikolaei, Xiaofeng Liu
Summary: Underwater unexploded ordnances (UXOs) pose a significant threat to humans and the environment. Understanding the hydrodynamics and scour process around UXOs is crucial. This study investigates the impact of UXO shape on hydrodynamics and scour, as well as the role of flow angle of attack.
Article
Water Resources
Fu Liao, M. Bayani Cardenas, Xiaobing Chen, Guangcai Wang
Summary: Groundwater discharge flux into rivers is important for the conservation and management of aquatic ecosystems and resources. This study used Rn-222 as a tracer to estimate groundwater discharge into the Lower Colorado River in Austin, Texas, USA. The results showed that Rn-222 in river water and groundwater changed synchronously over a flood cycle, and the estimated groundwater discharge ranged from negative values to 1570 m³/h. The study also emphasized the importance of monitoring Rn-222 in near-stream groundwater to accurately characterize dynamic groundwater discharge.
HYDROLOGICAL PROCESSES
(2023)
Article
Agricultural Engineering
Yuncheng Xu, Xiaofeng Liu
Summary: This paper evaluates the accuracy of two suspended sediment samplers using a three-dimensional computational fluid dynamics model, and finds that the samplers have negligible effect on the sediment concentration at the inlet nozzle.
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2022)
Article
Engineering, Environmental
Kewei Chen, Xingyuan Chen, James C. Stegen, Jorge A. Villa, Gil Bohrer, Xuehang Song, Kuang-Yu Chang, Matthew Kaufman, Xiuyu Liang, Zhiling Guo, Eric E. Roden, Chunmiao Zheng
Summary: CH4 emissions from inland waters, especially streams and rivers, are uncertain due to the lack of mechanistic understanding. Previous studies have attributed the spatiotemporal heterogeneity of riverine CH4 to environmental factors, but the underlying mechanisms remain unclear.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Editorial Material
Geosciences, Multidisciplinary
Susan Trumbore, Ana Barros, Thorsten Becker, M. Bayani Cardenas, Eric Davidson, Nicolas Gruber, Eileen Hofmann, Mary Hudson, Tissa Illangasekare, Sarah Kang, Alberto Montanari, Marcos Moreno, Francis Nimmo, Larry Paxton, Vincent J. M. Salters, David Schimel, Bjorn Stevens, Hang Su, Donald Wuebbles, Peter Zeitler, Binzheng Zhang
Summary: The editorial board of AGU Advances expresses gratitude to the individuals who reviewed manuscripts for the journal in 2022. Thanks to the 131 reviewers who contributed to AGU Advances in 2022.
Article
Environmental Sciences
Julia A. Guimond, Cansu Demir, Barret L. Kurylyk, Michelle A. Walvoord, James W. Mcclelland, M. Bayani Cardenas
Summary: Groundwater discharge to the ocean along Arctic coastlines plays a significant role in carbon budgets and water quality. This study investigates the magnitude and drivers of groundwater discharge to Alaska's Beaufort Sea coast using unique coastal Arctic groundwater timeseries data. The results reveal temporally variable groundwater fluxes driven by wind-driven lagoon water level changes, with implications for nearshore biogeochemistry.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Anna B. Turetcaia, Vanessa A. Garayburu-Caruso, Matthew H. Kaufman, Robert E. Danczak, James C. Stegen, Rosalie K. Chu, Jason G. Toyoda, M. Bayani Cardenas, Emily B. Graham
Summary: This study investigates the impact mechanisms of carbon and nitrogen limitations on dissolved organic matter (DOM) metabolism in hyporheic zones (HZs). The results show that the thermodynamics of DOM and organic nitrogen are relevant at different depths in the HZ, suggesting that aerobic respiration (AR) is limited by multiple competing processes in the HZ.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Matthew Kaufman, Joshua Torgeson, James Stegen
Summary: We present a system for conducting small batch reactor oxygen consumption experiments on water and sediment samples, which offers advantages of multiple reactors operation, simultaneous measurement of oxygen concentrations, high throughput, and high time-resolution data. The system is designed to address the limitations in existing literature on similar studies and provide practical guidance for other researchers to construct and operate a similar system.