80 citations · 373 across the 33 of their papers we have counts for
34 papers
Diffusion of charged rods across 3D varying section channels
N. Ray, A. Semkiv, J. Harting +1
We analyze the transport of rod-like particles by diffusion and drift in a three-dimensional channel with varying circular or elliptic cross section. Applying the Fick-Jacobs appro…
Closed-Form Solution for Oscillatory Flow and Wall Shear Stress in Axisymmetric Corrugated Tubes
Frederik Keil, Paolo Malgaretti, Othmane Aouane +1
Pulsatile flow in corrugated tubes arises in hemodynamics and microfluidics, where oscillatory forcing and geometric constrictions jointly determine transport and wall loading. We…
Free-Energy Analysis of Bubble Nucleation on Electrocatalytic Surfaces
Qingguang Xie, Paolo Malgaretti, Othmane Aouane +2
Bubble nucleation at catalyst surfaces plays a critical role in the operation of electrolyzers. However, achieving controlled bubble nucleation remains challenging due to limited u…
How back reaction, hydrogen transport, and capillarity control the performance of hydrogen release from liquid organic carriers
Tatiana Nizkaia, Thomas Solymosi, Paolo Malgaretti +2
We derive a theoretical model to elucidate the inhibition of catalytic activity during the dehydrogenation of Liquid Organic Hydrogen Carriers (LOHC). Within our model, we account…
Spontaneous Emergence of Solitary Waves in Active Flow Networks with Elastic Elements
Rodrigo Fernández-Quevedo García, Gonçalo Cruz Antunes, Jens Harting +6
Flow networks are fundamental for understanding systems such as animal and plant vasculature or power distribution grids. These networks can encode, transmit, and transform informa…
Effects of Hydrogen Transport on the Kinetic Regimes of 4-Nitrophenol Reduction by Sodium Borohydride
Tatiana Nizkaia, Philipp Groppe, Valentin Müller +3
The reduction of 4-nitrophenol (4-NiP) with sodium borohydride is widely used to benchmark heterogeneous catalysts, yet its kinetics are commonly oversimplified as pseudo-first-ord…
Zigzagging Diffusion and Non-Standard Transport in Particle-laden Nanopores Under Extreme Confinement
A. Baer, P. Malgaretti, K. Hoellring +2
Understanding transport subject to molecular-scale confinement is key to advancing nanofluidics, yet classical hydrodynamic laws often fail at these scales. Here, we study a model…
Mechanical work extraction from an error-prone active dynamic Szilard engine
Luca Cocconi, Paolo Malgaretti, Holger Stark
Isothermal information engines operate by extracting net work from a single heat bath through measurement and feedback control. In this work, we analyze a realistic active Szilard…
Modelling of the dewetting of ultra-thin liquid films on chemically patterned substrates: linear spectrum and deposition patterns
Tilman Richter, Paolo Malgaretti, Jens Harting
Liquid films of nanometric thickness are prone to spinodal dewetting driven by disjoining pressure, meaning that a non-wetting liquid film of homogeneous thickness in the range of…
Transport of electrolytes across nanochannels: the role of slip
F. Carusela, J. Harting, P. Malgaretti
We characterize the electrokinetic flow due to the transport of electrolytes embedded in nanochannels of varying cross-section with inhomogeneous slip on their walls, modeled as an…
Modeling of thin liquid films with arbitrary many layers
Tilman Richter, Paolo Malgaretti, Jens Harting
We propose the generalization of the thin film equation (TFE) to arbitrarily many immiscible liquid layers. Then, we provide different pathways for deriving the hydrodynamic pressu…
Enhancement of bubble transport in porous electrodes and catalysts
Thomas Scheel, Paolo Malgaretti, Jens Harting
We investigate the formation and transport of gas bubbles across a model porous catalyst/electrode using lattice Boltzmann simulations. This approach enables us to systematically e…
A lattice Boltzmann approach for acoustic manipulation
E. Castro-Avila, P. Malgaretti, J. Harting +1
We employ a lattice Boltzmann method to compute the acoustic radiation force produced by standing waves on a compressible object. Instead of simulating the fluid mechanics equation…
Chemically reactive thin films: dynamics and stability
Tilman Richter, Paolo Malgaretti, Thomas M. Koller +1
Catalyst particles or complexes suspended in liquid films can trigger chemical reactions leading to inhomogeneous concentrations of reactants and products in the film. We demonstra…
Turning catalytically active pores into active pumps
G. C. Antunes, P. Malgaretti, J. Harting
We develop a semi-analytical model of self-diffusioosmotic transport in active pores, which includes advective transport and the inverse chemical reaction which consumes solute. In…
Surface viscosity in simple liquids
Paolo Malgaretti, Ubaldo Bafile, Renzo Vallauri +2
The response of Newtonian liquids to small perturbations is usually considered to be fully described by homogeneous transport coefficients like shear and dilatational viscosity. Ho…
Splitting probabilities for dynamics in corrugated channels: passive VS active Brownian motion
P. Malgaretti, T. Nizkaia, G. Oshanin
In many practically important problems which rely on particles' transport in realistic corrugated channels, one is interested to know the probability that either of the extremities…
Closed formula for the transport of micro-nano-particle across model porous media
P. Malgaretti, J. Harting
In the last decade the Fick-Jacobs approximation has been exploited to capture the transport across constrictions. Here, we review the derivation of the Fick-Jacobs equation with p…
Modelling diffusive transport of particles interacting with slit nanopore walls: The case of fullerenes in toluene filled alumina pores
Andreas Baer, Paolo Malgaretti, Malte Kaspereit +2
Accurate modeling of diffusive transport of nanoparticles across nanopores is a particularly challenging problem. The reason is that for such narrow pores the large surface-to-volu…
Resolving the microscopic hydrodynamics at the moving contact line
Amal K. Giri, Paolo Malgaretti, Dirk Peschka +1
The molecular structure of moving contact lines (MCLs) and the emergence of a corresponding macroscopic dissipation have made the MCL a paradigm of fluid dynamics. Through novel av…
Szilard engines and information-based work extraction for active systems
P. Malgaretti, H. Stark
The out of equilibrium nature of active systems can be exploited for the design of information-based engines. We design two types of an active Szilard engine that use a Maxwell dae…
Pumping and mixing in active pores
G. C. Antunes, P. Malgaretti, J. Harting +1
We show both numerically and analytically that a chemically patterned active pore can act as a micro/nano-pump for fluids, even if it is fore-aft symmetric. This is possible due to…
Phoretic colloids close to and trapped at fluid interfaces
Paolo Malgaretti, Jens Harting
The active motion of phoretic colloids leads them to accumulate at boundaries and interfaces. Such an excess accumulation, with respect to their passive counterparts, makes the dyn…
Antiresonant driven systems for particle manipulation
M. Florencia Carusela, Paolo Malgaretti, J. Miguel Rubi
We report on the onset of anti-resonant behaviour of mass transport systems driven by time-dependent forces. Anti-resonances arise from the coupling of a sufficiently high number o…