Article
Geochemistry & Geophysics
Lisa Winhausen, Alexandra Amann-Hildenbrand, Reinhard Fink, Mohammadreza Jalali, Kavan Khaledi, Pooya Hamdi, Janos L. Urai, Joyce Schmatz, Florian Amann
Summary: This paper presents a comparative laboratory study of different methods to determine the water permeability of saturated Opalinus Clay, and found the results obtained by different methods differ less than 15 percent. The pore pressure oscillation technique appears to be the most efficient in terms of experimental handling and data density, providing continuous data on permeability and storativity over a user-defined period of time.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Nicolas Brantut, Franciscus M. Aben
Summary: The new type of transducer is capable of measuring local pore fluid pressure in rock samples under high confining pressure conditions, with high accuracy and flexibility in design. The prototypes show good linearity up to 80 MPa with minimal deviations, and are useful for tracking and quantifying changes in permeability associated with faulting and transient flow in different types of rock.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
M. Soldi, L. Guarracino, D. Jougnot
Summary: Dissolution and precipitation processes alter the structure of porous media, affecting their macroscopic properties. A theoretical model is proposed to estimate the effective excess charge density, which has been validated using experimental data.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
P. Schmidt, N. Dutler, H. Steeb
Summary: In this study, a hydro-mechanical simulation model was proposed to investigate the interaction between fluid flow and fracture deformation under in situ stress conditions. The model was applied to experimental field data and provided insights into the leading mechanisms of flow processes during hydraulic testing. The study emphasized the importance of considering both local and non-local fracture deformation in inverse analysis of hydraulic testing data to improve the understanding of hydro-mechanical flow processes in fractured reservoirs.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Lucas Pimienta, Beatriz Quintal, Eva Caspari
Summary: While hydro-mechanical coupling in rocks explains how fluid-saturated rocks respond to pressure variations, the relationship between properties may not always be straightforward, especially in rocks with different pore types. The interdependence between mechanical and hydraulic properties, which differ based on pore families, can lead to underestimation of rock compressibility in poroelasticity experiments.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Jana H. Boerner, Volker Herdegen, Jens-Uwe Repke, Klaus Spitzer
Summary: Traditional quantification of physical rock properties relies on laboratory analyses, which can be costly and time-consuming for reactive rock-fluid-gas systems. A new methodology based on systematic crushing, multimethod laboratory measurements, and model-based computational evaluation is presented to overcome these challenges.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
N. Panwar, A. Revil, R. Sharma, M. Schmutz, P. A. Duvillard, B. Garcia, A. Cerepi, R. Garcia-Artigas, P. Vaudelet, E. Malet, S. Jaillet
Summary: The study discusses the complex conductivity measurements of carbonate rocks and presents a simple model of induced polarization. The relationship between the in-phase conductivity, surface conductivity, and normalized chargeability with pore space characteristics is discussed. The results show linear correlations and provide insights into the properties of carbonate formations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Qiuzi Li, Lang Feng, Stephen D. Cameron, Harry W. Deckman, Deniz Ertas
Summary: The study introduces a theoretical framework that directly relates membrane polarization to intrinsic statistical properties of porous materials, providing a new way to model complex pore structures with a few statistical parameters, and quantifying how different physical processes drive complex conductivity responses in the absence of conducting grains.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
K. Zhang, N. Chibati, A. Revil, J. Richard, M. Gresse, Y. Xue, Y. Geraud
Summary: The petrophysical properties of volcanic samples from La Soufriere volcano in Guadeloupe Island were investigated. The study measured the conductivity spectra, wave velocities, thermal conductivity, specific heat capacity, permeability, cation exchange capacity, and porosity of the rock samples. The relationships between these properties were examined, and a specific example of converting induced polarization survey data into a seismic velocity model was provided. The findings lay the groundwork for joint inversion of seismic and induced polarization surveys for volcanic unrest monitoring.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Adrian Mellage, Gal Zakai, Bar Efrati, Holger Pagel, Nimrod Schwartz
Summary: This study utilizes the geophysical method spectral induced polarization (SIP) to monitor the capacity of soils to immobilize sorbing contaminants. Results show that without solid organic matter (SOM) amendment, soil polarization decreases with increasing sorbed contaminants, exhibiting a leveling-off behavior. The addition of SOM increases the soil conductivity and modifies the dependence between conductivity and sorbed contaminants. The time constant derived from the Cole-Cole model indicates a saturation-type dependence governed by a drop in ion mobility with increasing sorption.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Alejandro Garcia, Emily Asenath-Smith, Dan R. Glaser, Lee Slater
Summary: This study investigates the induced polarization (IP) response of calcite precipitation in different media. The results suggest that the polarization of the electrical double layer surrounding calcite grains is not a significant contributor to IP signals, but under certain circumstances, calcite precipitation can produce a strong IP response.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
L. Friedli, N. Linde, D. Ginsbourger, A. Doucet
Summary: This study explores lithological tomography using the pseudo-marginal method, which involves Monte Carlo sampling and importance sampling to approximate the intractable likelihood of geological parameters. By demonstrating the effectiveness of the correlated PM method and a prior-preserving proposal scheme, the study shows significant improvements in posterior exploration in both linear and nonlinear settings.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
L. Friedli, N. Linde, D. Ginsbourger, A. Doucet
Summary: This article discusses using the pseudo-marginal method in lithological tomography to estimate the posterior distribution of (hydro)geological parameters. By utilizing importance sampling and a prior-preserving proposal scheme, the proposed method outperforms current state-of-the-art methods in both linear and non-linear settings.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
P-A Duvillard, F. Magnin, A. Revil, A. Legay, L. Ravanel, F. Abdulsamad, A. Coperey
Summary: Knowledge of the thermal state of steep alpine rock faces is crucial for assessing geohazards related to permafrost degradation. This study uses a new petrophysical model with electrical conductivity and normalized chargeability data to infer permafrost distribution, finding that only the NW face of the rock ridge is frozen. By modeling bedrock temperature across the ridge and confirming permafrost presence, a low-cost approach to monitoring temperature distribution in Alpine rock walls is provided in response to climate change.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Engineering, Civil
Jesus Alberto Mezquita Gonzalez, Jean-Christophe Comte, Anatoly Legchenko, Ulrich Ofterdinger, David Healy
Summary: The study assessed the use of electrical resistivity tomography (ERT) combined with borehole data to analyze the spatial variability of groundwater storage in weathered/fractured basement rock aquifers. Results showed the importance of hydrogeological conceptual constraints provided by ERT and the influence of clay minerals on resistivity data in accurately predicting groundwater storage properties. The study demonstrated the potential of resistivity tomography for quantifying groundwater storage heterogeneity in such aquifers with reasonable uncertainty.
JOURNAL OF HYDROLOGY
(2021)
Article
Chemistry, Medicinal
Stijn H. S. Koshari, Xutao Shi, Linda Jiang, Debby Chang, Karthikan Rajagopal, Abraham M. Lenhoff, Norman J. Wagner
Summary: An extensive data set was used to advance the development of a model-informed design of controlled drug release. An improved drug-release model incorporating mechanistic modeling of hydrolytic polymer degradation was used and validated against in vitro experiments. The study demonstrates the potential for achieving a priori design of controlled drug release by combining parameter estimates from the literature with model fits to the data set. The results highlight the importance of careful selection of the polymer grade and the need for better understanding of phenomena like pore formation in designing drug release systems.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2022)
Article
Engineering, Aerospace
Jennifer N. Mills, Maria Katzarova, Norman J. Wagner
Summary: This study explores the use of lunar and Martian regoliths to create construction materials with tailored properties, finding that the compressive strength of binders varies depending on the simulant and curing conditions. Higher compressive strength is observed in lunar simulant binders after heating to 600 degrees C, while the opposite effect is seen in Martian simulant binders. The research offers a robust framework for comparing the performance of different simulants and reveals the effects of vacuum curing and exposure to extreme temperatures on the cured binders.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Mechanics
Matthew Armstrong, Andre Pincot, Soham Jariwala, Jeff Horner, Norman Wagner, Antony Beris
Summary: Recent research has found that human blood exhibits the characteristics of a complex material, including shear-thinning and viscoelastic behavior. There is renewed interest in modeling human blood, and an enhanced thixotropic viscoelastic model has been developed. This model shows superior performance in fitting blood rheological data compared to other models, and modifications have been made to further improve its predictive capability.
JOURNAL OF RHEOLOGY
(2022)
Article
Mechanics
Antony N. Beris, Soham Jariwala, Norman J. Wagner
Summary: In this study, the macroscopic governing equations for heat and mass transfer in a general multicomponent system are derived using a systematic nonequilibrium thermodynamics framework. The relative component mass fluxes and heat flux are treated explicitly, allowing for the description of relaxation phenomena and the coupling of heat and mass transfer. The resulting models are Galilean invariant and always respect the second law of thermodynamics, consistent with traditional transport equations and the kinetic theory limit for dilute gases.
Article
Chemistry, Physical
Khushboo Suman, Norman J. Wagner
Summary: In this study, the aging behavior of a colloidal suspension model system is investigated. It is found that different quench depths result in different aging behaviors, with a monotonic increase in modulus over time for shallow quenches and a drop followed by a plateau for deeper quenches. This phenomenon may be attributed to the quenching into different thermodynamic states and the influence of adhesive glass dynamical arrest.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Mechanics
Jennifer Mills, Norman Wagner
Summary: Temporal measurements of elastic shear moduli development of aluminosilicate gels show systematic trends in kinetics with respect to silicon to aluminum ratio. This behavior can be reduced to a single master curve when nondimensionalized with the Si/Al-dependent gel time and equilibrium modulus. An autocatalytic reaction model and Avrami model fit the master curve well.
Article
Instruments & Instrumentation
Y. Summer Tein, Benjamin R. Thompson, Chuck Majkrzak, Brian Maranville, Damian Renggli, Jan Vermant, Norman J. Wagner
Summary: Understanding the structure-property relationship of complex fluid-fluid interfaces is crucial for designing systems with targeted interfacial properties. This article presents a new instrument capable of controlled interfacial dilation and shear kinematics, combined with in situ microscopy and neutron reflectometry for detailed structural measurements of the interface at the mesoscale and nanoscale.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Civil
Nele Gruenenbaum, Thomas Guenther, Janek Greskowiak, Thomas Vienken, Mike Mueller-Petke, Gudrun Massmann
Summary: Understanding the interaction between terrestrial freshwater and seawater in subterranean estuaries is crucial for considering nutrient fluxes from land to sea. Recent research suggests the presence of multiple saline recirculation cells in the subterranean estuary, which can influence the land-sea interaction. This study utilizes Electrical Resistivity Tomography (ERT) and Direct Push (DP) techniques to investigate the salinity distribution in a high-energy beach. The experimental results confirm the existence of upper saline recirculation cells and brackish discharge locations, highlighting the significance of the beach system.
JOURNAL OF HYDROLOGY
(2023)
Article
Mechanics
Natalie Germann, Norman J. Wagner, Antony N. Beris
Summary: This paper derives the rheological equation of state for a viscoelastic liquid by using a suspension of elastic dumbbells or chain-like particle aggregates as a simple model. The equation incorporates the concept of an elastic strain component and can be seen as a nonlinear extension of the generalized Maxwell model. The liquid is characterized by a sequence of nested continua, each associated with an elasticity law. The directional dependence of the mobility of the structural elements leads to deviations from the Weissenberg liquid behavior.
Article
Geochemistry & Geophysics
Saeed Nazari, Raphael Rochlitz, Thomas Guenther
Summary: For semi-airborne mineral exploration, it is crucial to design experimental procedures that can generate data to maximize desired information. Through investigating the effects of transmitter-receiver geometries for various anomalies and semi-airborne layouts, we found that a flight line spacing of 200 m and a point distance of 100 m provide the optimal trade-off between coverage and survey progress for different targets. In addition, the length of the transmitter should be at least equal to the length of the target, and the location and direction of the transmitter cables play a significant role in the inversion results.
Article
Food Science & Technology
Caroline E. Giacomin, Kyle Kim, Norman J. Wagner
Summary: In this study, the rheological properties of semi-crystalline alpha-1,3-glucan were investigated in relation to composition and processing. The viscosity profiles were found to be influenced by shear history and weight fraction, and could be modeled using the Cross model. The suspensions exhibited soft solid behavior typically observed for suspensions. The results also showed that suspensions prepared with polymers of different chain lengths had similar rheology. These findings provide valuable information for the design of alpha-1,3-glucan products and processes.
ACS FOOD SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Sonja H. Wadas, Hermann Buness, Raphael Rochlitz, Peter Skiba, Thomas Guenther, Michael Grinat, David C. Tanner, Ulrich Polom, Gerald Gabriel, Charlotte M. Krawczyk
Summary: This study demonstrates the benefits of a combined geophysical investigation using P-wave and SH-wave reflection seismics, electrical resistivity tomography, transient electromagnetics, and gravimetry for better understanding of subsurface dissolution processes. By applying these methods in the Esperstedter Ried area in Germany, researchers were able to locate buried dissolution structures and zones, faults and fractures, as well as potential fluid pathways and aquifers.
Correction
Mechanics
Antony N. Beris, Soham Jariwala, Norman J. Wagner
Article
Chemistry, Physical
Yu-Fan Lee, Yimin Luo, Tianyi Bai, Scott C. Brown, Norman J. Wagner
Summary: Research on shear thickening colloidal suspensions demonstrates that measurements of the microstructure can elucidate the source of the rheological material properties. Neutron scattering methods have been used to resolve the longer-length scale microstructure in the shear thickened state. These findings provide experimental evidence and guidance for theoretical investigations.
Meeting Abstract
Psychology, Multidisciplinary
Megan P. Heintzelman, Richard R. Suminski, Gregory M. Dominick, Norman J. Wagner, Matthew Saponaro
ANNALS OF BEHAVIORAL MEDICINE
(2022)