37 citations · 456 across the 40 of their papers we have counts for
44 papers
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…
Morphology Formation Pathways in Solution-Processed Perovskite Thin Films
M. Majewski, O. J. J. Ronsin, J. Harting
The active layer in a perovskite solar cell is usually composed of a polycrystalline thin film. Fabrication of this layer by solution processing is a promising candidate for up-sca…
Parasitic hydrogen bubble evolution in vanadium redox flow batteries: A lattice Boltzmann study
K. Duan, T. H. Vu, T. Kadyk +3
Vanadium redox flow batteries (VRFBs) are a promising technology to capture and store energy from renewable sources, reducing the reliance on fossil fuels for energy generation. Ho…
Margination of artificially stiffened red blood cells
Revaz D. Chachanidze, Othmane Aouane, Jens Harting +2
Margination, a fundamental process in which leukocytes migrate from the flowing blood to the vessel wall, is well-documented in physiology. However, it is still an open question on…
The interplay of shape and catalyst distribution in the yield of compressible flow microreactors
G. C. Antunes, M. Jiménez-Sánchez, P. Malgaretti +2
We develop a semi-analytical model for transport in structured catalytic microreactors, where both reactant and product are compressible fluids. Making use of the lubrication and F…
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…
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…
Cell-free layer development and spatial organization of healthy and rigid red blood cells in a microfluidic bifurcation
Yazdan Rashidi, Othmane Aouane, Alexis C. Darras +4
Bifurcations and branches in the microcirculation dramatically affect blood flow as they determine the spatiotemporal organization of red blood cells (RBCs). Such changes in vessel…
Suspensions of viscoelastic capsules: effect of membrane viscosity on transient dynamics
Fabio Guglietta, Francesca Pelusi, Marcello Sega +2
Membrane viscosity is known to play a central role in the transient dynamics of isolated viscoelastic capsules by decreasing their deformation, inducing shape oscillations and redu…
Inertial focusing of a dilute suspension in pipe flow
Othmane Aouane, Marcello Sega, Bastian Bäuerlein +2
The dynamics of rigid particle suspensions in a wall-bounded laminar flow present several non-trivial and intriguing features, including particle ordering, lateral transport, and t…
Formation of crystalline bulk heterojunctions in organic solar cells: insights from phase-field simulations
Olivier Ronsin, Jens Harting
The performance of organic solar cells strongly depends on the bulk heterojunction (BHJ) morphology of the photoactive layer. This BHJ forms during the drying of the wet-deposited…
Phase-field simulations of the morphology formation in evaporating crystalline multicomponent films
Olivier J. J. Ronsin, Jens Harting
In numerous solution-processed thin films, a complex morphology resulting from liquid-liquid phase separation (LLPS) or from polycrystallization arises during the drying or subsequ…
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…
Squeezing multiple soft particles into a constriction: transition to clogging
Clément Bielinski, Othmane Aouane, Jens Harting +1
We study numerically how multiple deformable capsules squeeze into a constriction. This situation is largely encountered in microfluidic chips designed to manipulate living cells,…
Capillary interactions, aggregate formation and the rheology of particle-laden flows: a lattice Boltzmann study
Lei Yang, Marcello Sega, Steffen Leimbach +3
The agglomeration of particles caused by the formation of capillary bridges has a decisive impact on the transport properties of a variety of at a first sight very different system…
Instability of particle inertial migration in shear flow
Evgeny S. Asmolov, Tatiana V. Nizkaya, Jens Harting +1
In a shear flow particles migrate to their equilibrium positions in the microchannel. Here we demonstrate theoretically that if particles are inertial, this equilibrium can become…
Two-dimensional Cahn-Hilliard simulations for coarsening kinetics of spinodal decomposition in binary mixtures
Björn König, Olivier J. J. Ronsin, Jens Harting
The evolution of the microstructure due to spinodal decomposition in phase separated mixtures has a strong impact on the final material properties. In the late stage of coarsening,…
Phase-field simulation of liquid-vapor equilibrium and evaporation of fluid mixtures
Olivier J. J. Ronsin, DongJu Jang, Hans-Joachim Egelhaaf +2
In solution-processing of thin films, the material layer is deposited from a solution composed of several solutes and solvents. The final morphology and hence the properties of the…
Transport of neutral and charged nanorods across varying-section channels
Paolo Malgaretti, Jens Harting
We study the dynamics of neutral and charged rods embedded in varying-section channels. By means of systematic approximations, we derive the dependence of the local diffusion coeff…
Regimes of motion of magnetocapillary swimmers
Alexander Sukhov, Maxime Hubert, Galien Grosjean +6
The dynamics of a triangular magnetocapillary swimmer is studied using the lattice Boltzmann method. Performing extensive numerical simulations taking into account the coupled dyna…
Capillary-bridge Forces Between Solid Particles: Insights from Lattice Boltzmann Simulations
Lei Yang, Marcello Sega, Jens Harting
Liquid capillary-bridge formation between solid particles has a critical influence on the rheological properties of granular materials and, in particular, on the efficiency of flui…
Equilibrium orientation and adsorption of an ellipsoidal Janus particle at a fluid-fluid interface
Florian Günther, Qingguang Xie, Jens Harting
We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid-fluid interface. The particle surface comprises equally sized p…
Inertial migration of oblate spheroids in a plane channel
Tatiana V. Nizkaya, Anna S. Gekova, Jens Harting +2
We discuss an inertial migration of oblate spheroids in a plane channel, where steady laminar flow is generated by a pressure gradient. Our lattice Boltzmann simulations show that…