Maja Rücker
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View article: Nanoscale analysis of surface modifications on silanized glass: Wettability alteration and long-term stability
Nanoscale analysis of surface modifications on silanized glass: Wettability alteration and long-term stability Open
To investigate the effect of wettability on multiphase flow in porous media, hydrophilic glass surfaces are typically modified through a silanization process. Since wettability alteration arises from both chemical and structural changes, c…
View article: Detecting nucleation of water in superhydrophobic PTFE powders using Inverse Gas Chromatography
Detecting nucleation of water in superhydrophobic PTFE powders using Inverse Gas Chromatography Open
Nucleation of water on superhydrophobic surfaces is critical to applications such as water harvesting, thermal management, and energy systems. Despite their hierarchical roughness and hydrophobic nature, such surfaces can contain nano-scal…
View article: The Importance and Challenges Associated with Multi-scale Heterogeneity for Geological Storage
The Importance and Challenges Associated with Multi-scale Heterogeneity for Geological Storage Open
Understanding multi-scale heterogeneity in porous media has become increasingly critical as the world transitions from fossil fuel production to geological storage of CO2 and H2 for climate change mitigation. This commentary examines why s…
View article: Nanoscale Analysis of Surface Modifications on Silanized Glass: Wettability Alteration and Long-Term Stability
Nanoscale Analysis of Surface Modifications on Silanized Glass: Wettability Alteration and Long-Term Stability Open
To investigate the effect of wettability on multiphase flow in porous media, hydrophilic glass surfaces are typically modified through a silanization process. This study examines the nanoscale chemical and structural modifications of glass…
View article: A novel application of inverse gas chromatography for estimating contact angles in porous media
A novel application of inverse gas chromatography for estimating contact angles in porous media Open
The contact angle ranges determined by IGC and micro-CT for untreated glass beads, the most hydrophilic samples, showed great alignment. This consistency is attributed to the chemical amorphous nature of the untreated beads reflected in th…
View article: A Statistical Analysis of Fluid Interface Fluctuations: Exploring the Role of Viscosity Ratio
A Statistical Analysis of Fluid Interface Fluctuations: Exploring the Role of Viscosity Ratio Open
Understanding multiphase flow through porous media is integral to geologic carbon storage or hydrogen storage. The current modelling framework assumes each fluid present in the subsurface flows in its own continuously connected pathway. Th…
View article: Microgel-based etalon membranes: Characterization and properties
Microgel-based etalon membranes: Characterization and properties Open
We introduce Microgel-based Etalon Membranes (MEMs), based on the combination of stimuli-responsive microgels with an etalon, which is an optical device consisting of two reflecting plates and is used to filter specific wavelengths of ligh…
View article: In-situ 3D measurements of water films on the natural grain surface of porous rocks
In-situ 3D measurements of water films on the natural grain surface of porous rocks Open
During fluid displacement, e.g. in aquifers or other fluid reservoirs such as CO2 or H2 storage sites or hydrocarbon reservoirs, water films are expected to form along the internal pore surface due to its wetting properties and capillarity…
View article: Alterations in paraffin wax crystal networks induced by asphaltenes and pour point depressants, investigated by atomic force microscopy
Alterations in paraffin wax crystal networks induced by asphaltenes and pour point depressants, investigated by atomic force microscopy Open
Wax crystallization in pipelines in cold environments is a key factor affecting flow assurance during crude oil production. Polar crude oil components, such as asphaltenes, and polymeric pour point depressants (PPDs) have been demonstrated…
View article: Spontaneous Imbibition and Evaporation in Rocks at the Nanometer Scale
Spontaneous Imbibition and Evaporation in Rocks at the Nanometer Scale Open
Understanding multiphase fluid displacement dynamics in porous media is of great importance in efficiently designing hydrogen storage projects in porous reservoirs. During gas injection and extraction, cyclic evaporation and spontaneous im…
View article: H2-gas diffusion in porous media as observed by NMR
H2-gas diffusion in porous media as observed by NMR Open
Not only is hydrogen (H2) the simplest and most abundant gas in our universe, it also plays a pivotal role in the decarbonization of our energy. As such hydrogen will be one of the most important critical enablers for industry in the globa…
View article: Red Noise in Steady‐State Multiphase Flow in Porous Media
Red Noise in Steady‐State Multiphase Flow in Porous Media Open
Understanding the interaction between competing fluids in the pore space of rocks is key for predicting subsurface flow and trapping, such as with CO 2 in a saline aquifer. These processes occur over a large span of timescales (from second…
View article: Red noise in steady-state multiphase flow
Red noise in steady-state multiphase flow Open
Understanding the interaction between competing fluids in the pore space of rocks is key for predicting subsurface flow and trapping, such as with CO2 in a saline aquifer. These processes occur over a large span of timescales (from seconds…
View article: The Origin of Non-thermal Fluctuations in Multiphase Flow in Porous Media
The Origin of Non-thermal Fluctuations in Multiphase Flow in Porous Media Open
Core flooding experiments to determine multiphase flow in properties of rock such as relative permeability can show significant fluctuations in terms of pressure, saturation, and electrical conductivity. That is typically not considered in…
View article: Determination of the spatial distribution of wetting in the pore networks of rocks
Determination of the spatial distribution of wetting in the pore networks of rocks Open
The macroscopic movement of subsurface fluids involved in CO2 storage, groundwater, and petroleum engineering applications is controlled by interfacial forces in the pores of rocks, micrometre to millimetre in length scale. Recent advances…
View article: The development of intermittent multiphase fluid flow pathways through a porous rock
The development of intermittent multiphase fluid flow pathways through a porous rock Open
Intermittent fluid flow has recently been identified as an important transport mode for subsurface multiphase flow systems such as CO2 storage and natural gas production. However, due to experimental limitations, it has not been possible t…
View article: Real‐Time Imaging Reveals Distinct Pore‐Scale Dynamics During Transient and Equilibrium Subsurface Multiphase Flow
Real‐Time Imaging Reveals Distinct Pore‐Scale Dynamics During Transient and Equilibrium Subsurface Multiphase Flow Open
Many subsurface fluid flows, including the storage of CO 2 underground or the production of oil, are transient processes incorporating multiple fluid phases. The fluids are not in equilibrium meaning macroscopic properties such as fluid sa…
View article: Surrogate Models for Studying the Wettability of Nanoscale Natural Rough Surfaces Using Molecular Dynamics
Surrogate Models for Studying the Wettability of Nanoscale Natural Rough Surfaces Using Molecular Dynamics Open
A molecular modeling methodology is presented to analyze the wetting behavior of natural surfaces exhibiting roughness at the nanoscale. Using atomic force microscopy, the surface topology of a Ketton carbonate is measured with a nanometer…
View article: Verifying Pore Network Models of Imbibition in Rocks Using Time‐Resolved Synchrotron Imaging
Verifying Pore Network Models of Imbibition in Rocks Using Time‐Resolved Synchrotron Imaging Open
At the pore scale, slow invasion of a wetting fluid in porous materials is often modeled with quasi‐static approximations which only consider capillary forces in the form of simple pore‐filling rules. The appropriateness of this approximat…
View article: Signature of elastic turbulence of viscoelastic fluid flow in a single pore throat
Signature of elastic turbulence of viscoelastic fluid flow in a single pore throat Open
When a viscoelastic fluid, such as an aqueous polymer solution, flows through a porous medium, the fluid undergoes a repetitive expansion and contraction as it passes from one pore to the next. Above a critical flow rate, the interaction b…
View article: Verifying pore network models of imbibition in rocks using time-resolved synchrotron imaging
Verifying pore network models of imbibition in rocks using time-resolved synchrotron imaging Open
At the pore scale, slow invasion of a wetting fluid in porous materials is often modelled with quasi-static approximations which only consider capillary forces in the form of simple pore filling rules. The appropriateness of this approxima…
View article: Imaging Spontaneous Imbibition in Full Darcy‐Scale Samples at Pore‐Scale Resolution by Fast X‐ray Tomography
Imaging Spontaneous Imbibition in Full Darcy‐Scale Samples at Pore‐Scale Resolution by Fast X‐ray Tomography Open
Spontaneous imbibition is a process occurring in a porous medium which describes wetting phase replacing nonwetting phase spontaneously due to capillary forces. This process is conventionally investigated by standardized, well‐established …
View article: The Effect of Mixed Wettability on Pore‐Scale Flow Regimes Based on a Flooding Experiment in Ketton Limestone
The Effect of Mixed Wettability on Pore‐Scale Flow Regimes Based on a Flooding Experiment in Ketton Limestone Open
Darcy‐scale multiphase flow in geological formations is significantly influenced by the wettability of the fluid‐solid system. So far it has not been understood how wettability impacts the pore‐scale flow regimes within rocks, which were i…