Kerstin Eckert
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View article: Increasing rare earth extraction kinetics by tailored magnetic fields
Increasing rare earth extraction kinetics by tailored magnetic fields Open
The separation of the chemically similar rare-earth (RE) elements is difficult, consumes large amounts of chemicals, energy, water and emits environmentally harmful substances. To enhance the efficiency of RE separation, we develop and val…
View article: Numerical simulation of surface bubble growth at micro-cavities
Numerical simulation of surface bubble growth at micro-cavities Open
View article: Optical measurement of froth height and depth in a batch flotation test
Optical measurement of froth height and depth in a batch flotation test Open
Measuring the froth height and depth in froth flotation for the separation of valuable mineral particles is crucial for process optimization. The froth depth is linked to the flotation performance and product quality as it influences vario…
View article: Monitoring of Fluid Transport in Low Temperature Water Electrolyzers and Fuel Cells: Emerging Technologies and Future Prospects
Monitoring of Fluid Transport in Low Temperature Water Electrolyzers and Fuel Cells: Emerging Technologies and Future Prospects Open
Low temperature water electrolyzers (LTWEs) and low temperature hydrogen fuel cells (LTFCs) present a promising technological strategy for the productions and usages of green hydrogen energy towards a net-zero world. However, the interacti…
View article: Scanning acoustic microscopy for quantifying bubble evolution in alkaline water electrolyzers
Scanning acoustic microscopy for quantifying bubble evolution in alkaline water electrolyzers Open
View article: Scanning acoustic microscopy for quantifying bubble evolution in alkaline water electrolyzers
Scanning acoustic microscopy for quantifying bubble evolution in alkaline water electrolyzers Open
View article: Surface Functionalization of Additively Manufactured Polypropylene and Stainless Steel 316L: Impact on Wettability and Oxygen Nucleation
Surface Functionalization of Additively Manufactured Polypropylene and Stainless Steel 316L: Impact on Wettability and Oxygen Nucleation Open
View article: A geometric interpolation scheme for applying dynamic wetting to three-dimensional volume of fluid simulations
A geometric interpolation scheme for applying dynamic wetting to three-dimensional volume of fluid simulations Open
This paper presents a three-dimensional framework for simulating dynamic wetting phenomena using the volume of fluid (VOF) method, implemented in Basilisk. A geometric interpolation scheme is developed to obtain an accurate and reliable va…
View article: Dynamic equilibrium of electrochemical bubbles growing on microelectrodes
Dynamic equilibrium of electrochemical bubbles growing on microelectrodes Open
In gas evolving electrolysis, bubbles grow at electrodes due to a diffusive influx from oversaturation generated locally in the electrolyte by the electrode reaction. When considering electrodes of micrometre size resembling catalytic isla…
View article: An approach to quantify the true flotation recovery of floatable minerals using natural entrainment tracers and particle-based separation modeling
An approach to quantify the true flotation recovery of floatable minerals using natural entrainment tracers and particle-based separation modeling Open
In froth flotation, overall recovery of the floatable particles consists of true recovery and recovery by entrainment, where entrainment refers to the non-selective recovery of particles in the concentrate. To understand and optimize the f…
View article: Ultrasound induced enhancement of bubble-particle attachment in flotation: A study on micron-sized model particles
Ultrasound induced enhancement of bubble-particle attachment in flotation: A study on micron-sized model particles Open
View article: Numerical simulation of oversaturation-driven bubble growth on solid surfaces with dynamic wetting
Numerical simulation of oversaturation-driven bubble growth on solid surfaces with dynamic wetting Open
View article: Dual wetting electrode surfaces for alkaline water electrolysis
Dual wetting electrode surfaces for alkaline water electrolysis Open
Nickel electrodes are widely used in alkaline water electrolysis, yet the remaining electrode overpotentials are leading to significant losses in electrochemical performance. These are partly due to the electrogenerated bubbles growing at …
View article: Correction to: A contribution to 3D tracking of deformable bubbles in swarms using temporal information
Correction to: A contribution to 3D tracking of deformable bubbles in swarms using temporal information Open
View article: Increasing efficiency of solvent extractions of rare earth elements by magnetic fields
Increasing efficiency of solvent extractions of rare earth elements by magnetic fields Open
A novel method for rare-earth (RE) separation that incorporate magnetic separation into solvent extraction is proposed and validated. Exposing the RE(III) concentration boundary layer to a tailored magnetic field ( B ), solutomagnetic co…
View article: Development of composite coatings by ultrasonic-assisted jet electrodeposition method: Impact of ultrasonic power and Al2O3 concentration
Development of composite coatings by ultrasonic-assisted jet electrodeposition method: Impact of ultrasonic power and Al2O3 concentration Open
View article: Solutal Marangoni convection at growing oxygen bubbles during water electrolysis
Solutal Marangoni convection at growing oxygen bubbles during water electrolysis Open
Electrochemical water splitting leads to variations in the electrolyte concentration which might impact the surface tension at both hydrogen and oxygen bubbles. Although the potentially resulting solutal Marangoni convection has been predi…
View article: Electrolyte droplet spraying in H2 bubbles during water electrolysis under normal and microgravity conditions
Electrolyte droplet spraying in H2 bubbles during water electrolysis under normal and microgravity conditions Open
Electrolytically generated gas bubbles can significantly hamper the overall electrolysis efficiency. Therefore it is crucial to understand their dynamics in order to optimise water electrolyzer systems. Herein, we elucidate a distinct tran…
View article: Dynamic equilibrium of electrochemical bubbles growing on micro-electrodes
Dynamic equilibrium of electrochemical bubbles growing on micro-electrodes Open
In gas evolving electrolysis, bubbles grow at electrodes due to a diffusive influx from oversaturation generated locally in the electrolyte by the electrode reaction. When considering electrodes of micrometre size resembling catalytic isla…
View article: Visualization of the flow structure in dense particle suspensions using fluorescence-backlight particle tracking
Visualization of the flow structure in dense particle suspensions using fluorescence-backlight particle tracking Open
View article: Comparison of measured gas flux with Drift Flux Theory in a two-phase counter-current flow channel
Comparison of measured gas flux with Drift Flux Theory in a two-phase counter-current flow channel Open
View article: Oxygen versus Hydrogen Bubble Dynamics during Water Electrolysis at Microelectrodes
Oxygen versus Hydrogen Bubble Dynamics during Water Electrolysis at Microelectrodes Open
While the dynamics of hydrogen bubbles during water electrolysis have been intensively studied in recent years, adequate insights into the dynamics of oxygen bubbles are still lacking. Therefore, this study presents a comparative analysis …
View article: Rectilinear magnetophoresis of a single oil droplet in a paramagnetic rare-earth solution
Rectilinear magnetophoresis of a single oil droplet in a paramagnetic rare-earth solution Open
We studied the transient motion of single oil droplet dispersed in paramagnetic rare-earth dysprosium salt solution in a strong magnetic pressure gradient (∇B2). For that purpose, we used a concentric ring-rod NdFeB permanent magnetic asse…
View article: Magnetohydrodynamic effect during electrodeposition at conically structured electrodes
Magnetohydrodynamic effect during electrodeposition at conically structured electrodes Open
Micro- and nano-sized conical structures hold great potential in tailoring the surface wettability and in enhancing electrocatalytic applications. However, their manufacturing process remains a formidable challenge. This work investigates …
View article: WhY shape matters: Hydrodynamics of a Y-shaped membraneless electrolyzer
WhY shape matters: Hydrodynamics of a Y-shaped membraneless electrolyzer Open
View article: Boosting Electrode Performance and Bubble Management via Direct Laser Interference Patterning
Boosting Electrode Performance and Bubble Management via Direct Laser Interference Patterning Open
Laser-structuring techniques like Direct Laser Interference Patterning show great potential for optimizing electrodes for water electrolysis. Therefore, a systematic experimental study is performed to analyze the influence of the spatial p…
View article: A contribution to 3D tracking of deformable bubbles in swarms using temporal information
A contribution to 3D tracking of deformable bubbles in swarms using temporal information Open
Reliable Lagrangian 3D tracking of individual bubble swarm members allows a deeper understanding of hydrodynamic bubble–bubble interactions and their collective rise. For multi-view measurements, we have recently developed such a tracking …
View article: Reverse Flotation of Apatite from Iron Ore in a Refluxtm Flotation Cell
Reverse Flotation of Apatite from Iron Ore in a Refluxtm Flotation Cell Open
View article: Impact of wettability onto the growth of air bubbles at micro-cavities on silicon wafers: Experiments, simulations, and analytical solutions
Impact of wettability onto the growth of air bubbles at micro-cavities on silicon wafers: Experiments, simulations, and analytical solutions Open
The bubble growth at micro-cavities can be separated into a pinning stage and an expansion stage. On more hydrophobic surfaces, the duration of the pinning stage is shorter, and the bubble grows with a larger contact angle during the expan…
View article: Dynamic equilibrium of electrochemical bubbles growing on micro-electrodes
Dynamic equilibrium of electrochemical bubbles growing on micro-electrodes Open
In gas evolving electrolysis, bubbles grow at electrodes due to a diffusive influx from oversaturation generated locally in the electrolyte by the electrode reaction. When considering electrodes of micrometer-size resembling catalytic isla…