A5045700213- Groundwater flow and contamination studies
- CO2 Sequestration and Geologic Interactions
- Hydrocarbon exploration and reservoir analysis
- NMR spectroscopy and applications
- Advanced Mathematical Modeling in Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Soil and Unsaturated Flow
- Corrosion Behavior and Inhibition
- Advanced Data Processing Techniques
- Anodic Oxide Films and Nanostructures
- Fractional Differential Equations Solutions
- Rock Mechanics and Modeling
- Machine Learning in Materials Science
- Stochastic processes and statistical mechanics
- Calcium Carbonate Crystallization and Inhibition
- Hydrogen embrittlement and corrosion behaviors in metals
- Radioactive element chemistry and processing
- Geotechnical and Geomechanical Engineering
- Mine drainage and remediation techniques
- Geological and Geochemical Analysis
- Groundwater and Isotope Geochemistry
- Concrete Corrosion and Durability
- Heat and Mass Transfer in Porous Media
- Concrete and Cement Materials Research
- Reservoir Engineering and Simulation Methods
Paul Scherrer Institute
2022-2025
Weizmann Institute of Science
2024-2025
Swiss Light Source
2024
CEA Paris-Saclay
2018-2022
Centre de Géosciences
2017-2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2018-2022
Direction des énergies
2022
École Nationale Supérieure des Mines de Paris
2018
Université Paris-Saclay
2018
Laboratoire de Mesure du Carbone 14
2017
Molecular diffusion of chemical species in subsurface environments─rock formations, soil sediments, marine, river, and lake sediments─plays a critical role variety dynamic processes, many which affect water chemistry. We investigate demonstrate the occurrence anomalous (non-Fickian) behavior, distinct from classically assumed Fickian diffusion. measured molecular through series five chalk dolomite rock samples over period about two months. that all cases, behavior is significantly different...
Abstract For an effectively one-dimensional, semi-infinite disordered system connected to a reservoir of tracer particles kept at constant concentration, we provide the dynamics concentration profile. Technically, start with Montroll–Weiss equation continuous time random walk scale-free waiting density. From this pass formulation in terms fractional diffusion for profile <?CDATA $C(x,t)$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi>C</mml:mi><mml:mo...
Fickian (normal) diffusion models show limitations in quantifying diffusion-controlled migration of solute species through porous rock structures, as observed experiments. Anomalous prevails and can be interpreted using a Continuous Time Random Walk (CTRW) framework with clear mechanistic underpinning. From the associated fractional equation we derive solutions over broad range anomalous behaviours, from highly to nearly Fickian, that yield temporal breakthrough curves spatial concentration...
We introduce an experimental setup to chemically image corrosion processes at metal-electrolyte interfaces under stagnant, confined conditions-relevant in a wide range of situations. The is based on glass capillary, which precipitation products the interfacial aqueous phase can be monitored over time with optical microscopy, and structurally characterized microscopic synchrotron-based techniques (X-ray fluorescence, X-ray diffraction, absorption spectroscopy). Moreover, quantification...
We applied neutron imaging techniques to unveil pore scale flow processes occurring during desaturation of a homogeneous, saturated sand pack. For this purpose, we used small glass cell (2 cm x 2 0.1 cm) filled with pure, artificial S250 quartz sand. The space the was initially fully double distilled water (DDW). subjected series suction phases increasing tensions extract via bottom outlet, controlled by vacuum pump. In first phase, tension 0.016 MPa (low suction) for 248 min, followed 1.14...
Molecular diffusion, or more specifically, diffusion-controlled transport, of tracers, contaminants, and chemical species --- in soil rock formations, river, lake, marine sediments plays a critical role many dynamic processes that affect water chemistry properties the host domain. The spreading dissolved ionic via Brownian motion is generally described by Gaussian law for probability density function, with diffusion (embodying Fick&#8217;s second law) then being classical equation....
Reactive transport of solutes in porous media involving dissolution/precipitation reactions may alter the physical properties intact rocks, such as porosity and permeability. Such processes are difficult to predict characterize due heterogeneity at pore scale, caused by intimate coupling chemical processes. So far, experimental studies have mainly focused either on aspects, using short time batch or microfluidic experiments, transport, a medium classical counter diffusion cells. The former...
We introduce an experimental setup to chemically image corrosion processes at metal-electrolyte interfaces under stagnant, confined conditions relevant in a wide range of situations. The is based on glass capillary, which precipitation products the interfacial aqueous phase can be monitored over time with optical microscopy, and structurally characterized microscopic synchrotron-based techniques (X-ray fluorescence, X-ray diffraction, absorption spectroscopy). Moreover, quantification...
As a prove of concept for experimental geochemistry, an advanced 3D numerical framework, here and after called Digital Twin (DT), diffusion experiment conducted at synchrotron beamline, has been implemented using in-situ measurements data, physics-based modelling, machine learning (ML) model, parameter optimization module. The model enables finely discretized high-resolution mass transport simulations, which provide the training set ML model. resulting greatly accelerates computationally...