Wei Li

Massachusetts Institute of Technology

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i-10 index

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Co-Authors

Rubén Juanes

Massachusetts Institute of Technology

Herbert H. Einstein

Massachusetts Institute of Technology

John T. Germaine

Tufts University

Yue Meng

Stanford University

Olaf A. Cirpka

University of Tübingen

Andreas Englert

Ruhr University Bochum

Harry Vereecken

Forschungszentrum Jülich

Jinhui Peng

Kunming University of Science and Technology

Hanfang Chu

Hebei GEO University

Longcang Shu

Hohai University

Cooperative Institutions

Princeton University

Massachusetts Institute of Technology

University of Pennsylvania

Hohai University

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

University of Cambridge

Nanjing Hydraulic Research Institute

Kunming University of Science and Technology

Stanford University

Princeton Public Schools

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An Experimental Study of Matrix Dissolution and Wormhole Formation Using Gypsum Core Flood Tests: 2. Dissolution Kinetics and Modeling

Journal of Geophysical Research Solid Earth (2019)

Wei Li Herbert H. Einstein John T. Germaine

Abstract In the parallel paper by Li et al. (2019; https://doi.org/10.1029/2018JB017238 ), an effluent chemistry monitoring system was designed and used in core flood experiments to continuously measure the effluent concentration and study the evolution of the rock‐fluid system. In this study, the results from the parallel paper were used for interpretation and modeling of the dissolution and wormhole formation. Based on the behavior of the effluent concentration, two transient states and two quasi‐steady states were defined to describe the dissolution in the rock‐fluid system. Dimensional analysis was used to identify the controlling mechanisms of the dissolution and transport in the matrix and the wormholes. The dimensional analysis showed that the dissolution in the matrix was reaction controlled, while the dissolution in the wormholes was diffusion controlled. It also showed that the rock‐fluid system evolved from reaction‐controlled dissolution to diffusion‐controlled dissolution during the core flood tests. A continuum model and the extended Graetz solution were used to model the dissolution in the matrix and in the wormholes, respectively. In the continuum model, this study estimates the effective surface area as a function of the flow rate (injection flux), to account for the effect of flow conditions on dissolution. Finally, a semiempirical model combining the continuum model and the extended Graetz solution was developed to simulate the formation of wormholes and the evolution of the dissolution kinetics during core flood tests.

Wormhole

10.1029/2019jb018092

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Citations (4)

Remote Sensing Classification Using Fractal Dimensions over a Subtropical Hilly Region

Photogrammetric Engineering & Remote Sensing (2011)

Ji Zhu Jiancheng Shi Hanfang Chu Hu Jiawen Xiaozhou Li

10.14358/pers.77.1.65

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Citations (6)

INFLUENCE OF WATER SATURATION ON SEISMIC REFLECTION AND TRANSMISSION COEFFICIENTS AT A MAINLY WATER-SATURATED POROUS SOIL INTERFACE

Northwestern Seismological Journal (2002)

Wei Li

Based on the concept of homogeneous pore fluid and Biot's theory of twophase media,and using the model of Biot's theory to imitate imperfect saturated porous soil,the theoretical formulation of reflection and transmission coefficients at an interface between imperfect saturated porous soil and ordinary elastic soil for propagation of P wave and SV wave is developed.Numerical results show that only small difference in degrees of saturation may produce substantial influence on the coefficients at interface.The study suggests that we may carefully pay attention to the influence of water saturation on the dynamic analysis of seismic wave.

Biot number

Saturation (graph theory)

Reflection

Reflection coefficient

Transmission coefficient

Source

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Citations (1)

Analysis of slug interference tests conducted in an artificial fracture

Hydrogeology Journal (2021)

Yunfeng Dai Yanrong Zhao Jin Lin Jiangbo Han Xiaomin Sun

10.1007/s10040-020-02272-1

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Citations (2)

Laboratory study on the recharge efficiency of infiltration basin

International Symposium on Water Resource and Environmental Protection (2011)

Longcang Shu Xiaohui Wang Chaoqun Ma Chengpeng Lu Wei Li

The rectangle, square, triangle and circle are commonly used as the shape of infiltration basin. In this paper, influence of the shape of infiltration basin with the same area on recharge efficiency was studied through numerous simulations using the sand-box model. The hydraulic heads of groundwater were obtained within the domain of flow field. The recharge efficiency of different shapes was analyzed by comparing the groundwater head distribution, the total volume of recharge and the instantaneous infiltration capacity. The results indicate that the recharge efficiency changes with the shape of infiltration basin. The triangular recharge basin has the highest recharge efficiency attributing to its maximum perimeter, followed by the rectangular, square and circular recharge basin. The recharge efficiency apparently increases with the perimeter of the cross section under the condition of the same area.

Infiltration (HVAC)

Depression-focused recharge

Rectangle

10.1109/iswrep.2011.5892971

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Citations (0)

Photoporomechanics: An Experimental Method to Visualize the Effective Stress Field in Fluid-Filled Granular Media

Physical Review Applied (2021)

Wei Li Yue Meng Bauyrzhan K. Primkulov Rubén Juanes

Effective stress governs the mechanical behavior of porous media. In this study, we use photoelasticimetry to visualize the evolving effective stress field in fluid-filled granular media in processes that couple fluid flow and mechanical deformation. We refer to this experimental method as photoporomechanics. We develop a fabrication process to produce millimeter-scale residual-stress-free photoelastic spheres with high geometric accuracy. We use color to quantify the forces acting on the particles over a wide range of forces, while using light intensity for a small range of forces. We then provide an application of photoporomechanics to illustrate the evolution of effective stress during one-dimensional consolidation: a process by which the stresses caused by a sudden load are gradually transmitted through a fluid-filled granular pack as the fluid drains and excess pore pressures dissipate. Our technique provides a powerful experimental model system to study the grain-scale underpinning of coupled solid-fluid processes in granular media.

Consolidation

10.1103/physrevapplied.16.024043

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Citations (9)

Dynamic imaging of force chains in 3D granular media

Proceedings of the National Academy of Sciences (2024)

Wei Li Rubén Juanes

Granular media constitute the most abundant form of solid matter on Earth and beyond. When external forces are applied to a granular medium, the forces are transmitted through it via chains of contacts among grains-force chains. Understanding the spatial structure and temporal evolution of force chains constitutes a fundamental goal of granular mechanics. Here, we introduce an experimental technique, interference optical projection tomography, to study force chains in three-dimensional (3D) granular packs under triaxial shear loads and illustrate the technique with random assemblies of spheres and icosahedra. We find that, in response to an increasing vertical load, the pack of spheres forms intensifying vertical force chains, while the pack of icosahedra forms more interconnected force-chain networks. This provides microscopic insights into why particles with more angularity are more resistant to shear failure-the interconnected force-chain network is stronger (that is, more resilient to topological collapse) than the isolated force chains in round particles. The longer force chains with less branching in the pack of round particles are more likely to buckle, which leads to the macroscopic failure of the pack. This work paves the way for understanding the grain-scale underpinning of localized failure of 3D granular media, such as shear localization in landslides and stick-slip frictional motion in tectonic and induced earthquakes.

Shear force

Granular matter

10.1073/pnas.2319160121

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Citations (3)

Three‐Dimensional Geostatistical Inversion of Flowmeter and Pumping Test Data

Ground Water (2008)

Wei Li Andreas Englert Olaf A. Cirpka Harry Vereecken

We jointly invert field data of flowmeter and multiple pumping tests in fully screened wells to estimate hydraulic conductivity using a geostatistical method. We use the steady-state drawdowns of pumping tests and the discharge profiles of flowmeter tests as our data in the inference. The discharge profiles need not be converted to absolute hydraulic conductivities. Consequently, we do not need measurements of depth-averaged hydraulic conductivity at well locations. The flowmeter profiles contain information about relative vertical distributions of hydraulic conductivity, while drawdown measurements of pumping tests provide information about horizontal fluctuation of the depth-averaged hydraulic conductivity. We apply the method to data obtained at the Krauthausen test site of the Forschungszentrum Jülich, Germany. The resulting estimate of our joint three-dimensional (3D) geostatistical inversion shows an improved 3D structure in comparison to the inversion of pumping test data only.

10.1111/j.1745-6584.2007.00419.x

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Citations (96)

Fracturing in Wet Granular Media Illuminated by Photoporomechanics

Physical Review Applied (2022)

Yue Meng Wei Li Rubén Juanes

Unraveling the complex behavior of wet granular media has been challenging, because the effective stresses transmitted through the particles have remained unobservable. The authors use their recently developed extension of photoelasticity for coupled fluid-granular systems to image particle stresses during fracture by air injection in an oil-saturated granular pack. They discover two states of the granular medium evolving with the fractures, plus an ``effective-stress shadow'' behind the propagating fracture tips. This study points out the power of photoporomechanics for studying coupled fluid-solid processes in granular media, including energy recovery, gas venting, and geohazards.

Photoelasticity

Fracturing fluid

Particle (ecology)

10.1103/physrevapplied.18.064081

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Citations (7)

Effects of carbonization temperatures on characteristics of porosity in coconut shell chars and activated carbons derived from carbonized coconut shell chars

Industrial Crops and Products (2008)

Wei Li Kunbin Yang Jinhui Peng Libo Zhang Shenghui Guo

Specific surface area

BET theory

Carbon fibers

10.1016/j.indcrop.2008.02.012

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Citations (375)