2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR75 papers
- University of MünsterDE37 papers
- Los Alamos National LaboratoryUS33 papers
- Max Planck Institute for Dynamics and Self-OrganizationDE26 papers
- Observatoire de la Côte d’AzurFR26 papers
- University of StuttgartDE25 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE23 papers
- Heinrich Heine University DüsseldorfDE23 papers
- Northwestern UniversityUS23 papers
- Deutsches Elektronen-Synchrotron DESYDE22 papers
- Bogolyubov Institute for Theoretical PhysicsUA21 papers
- ETH ZurichCH21 papers
62 papers · 1 filter
Effects of correlated collisions and intermittency on the growth of lucky droplets
Tobias Bätge, Johannes Zierenberg, Michael Wilczek
To trigger precipitation, water droplets in warm clouds need to attain a sufficient size. Theoretical estimates based on condensation and gravitational collisions alone fail to exp…
Twisting vortex lines regularize Navier-Stokes turbulence
Dhawal Buaria, John M. Lawson, Michael Wilczek
Fluid flows are intrinsically characterized via the topology and dynamics of underlying vortex lines. Turbulence in common fluids like water and air, mathematically described by th…
Particle resuspension from complex multilayer deposits by laminar flows: statistical analysis and modeling
Hao Liu, Mireille Bossy, Bernhard Vowinckel +1
Particle resuspension refers to the physical process by which solid particles deposited on a surface are, first, detached and, then, entrained away by the action of a fluid flow. I…
An inflated dynamic Laplacian to track the emergence and disappearance of semi-material coherent sets
Jason Atnip, Gary Froyland, Péter Koltai
Lagrangian methods continue to stand at the forefront of the analysis of time-dependent dynamical systems. Most Lagrangian methods have criteria that must be fulfilled by trajector…
Carrier-phase DNS of ignition and combustion of iron particles in a turbulent mixing layer
Tien Duc Luu, Ali Shamooni, Andreas Kronenburg +9
Three-dimensional CP-DNS of reacting iron particle dust clouds in a turbulent mixing layer are conducted. The simulation approach considers the Eulerian transport equations for the…
Temporal large-scale intermittency and its impact on the statistics of turbulence
Lukas Bentkamp, Michael Wilczek
Turbulent flows in three dimensions are characterized by the transport of energy from large to small scales through the energy cascade. Since the small scales are the result of the…
Investigating the parametric dependence of the impact of two-way coupling on inertial particle settling in turbulence
Soumak Bhattacharjee, Josin Tom, Maurizio Carbone +1
Tom et al.\ (J.\ Fluid Mech.\ 947, A7, 2022) investigated the impact of two-way coupling (2WC) on particle settling in turbulence. For the limited parameter choices explored, it wa…
Collective variables between large-scale states in turbulent convection
Priyanka Maity, Andreas Bittracher, Péter Koltai +1
The dynamics in a confined turbulent convection flow is dominated by multiple long-lived macroscopic circulation states, which are visited subsequently by the system in a Markov-ty…
Lagrangian model for passive scalar gradients in turbulence
Xiaolong Zhang, Maurizio Carbone, Andrew D. Bragg
The equation for the fluid velocity gradient along a Lagrangian trajectory immediately follows from the Navier-Stokes equation. However, such an equation involves two terms that ca…
Optimal Turbulent Transport in Microswimmer Suspensions
Henning Reinken, Sabine H. L. Klapp, Michael Wilczek
Microswimmer suspensions self-organize into complex spatio-temporal flow patterns, including vortex lattices and mesoscale turbulence. Here we explore the consequences for the moti…
Quantitative prediction of sling events in turbulence at high Reynolds numbers
Tobias Bätge, Itzhak Fouxon, Michael Wilczek
Collisional growth of droplets, such as occurring in warm clouds, is known to be significantly enhanced by turbulence. Whether particles collide depends on their flow history, in p…
The effect of side walls on the stability of falling films
Hammam Mohamed, Jorn Sesterhenn, Luca Biancofiore
We study the influence of side walls on the stability of falling liquid films. We combine a temporal biglobal stability analysis based on the linearized Navier-Stokes equations wit…
Comparison of free-surface and conservative Allen-Cahn phase-field lattice Boltzmann method
Christoph Schwarzmeier, Markus Holzer, Travis Mitchell +3
This study compares the free-surface lattice Boltzmann method (FSLBM) with the conservative Allen-Cahn phase-field lattice Boltzmann method (PFLBM) in their ability to model two-ph…
Shear and bulk acceleration viscosities in simple fluids
J. Renner, M. Schmidt, D. de las Heras
Inhomogeneities in the velocity field of a moving fluid are dampened by the inherent viscous behaviour of the system. Both bulk and shear effects, related to the divergence and the…
Coherent structure detection and the inverse cascade mechanism in two-dimensional Navier-Stokes turbulence
Jiahan Wang, Jörn Sesterhenn, Wolf-Christian Müller
Coherent structures in two-dimensional Navier-Stokes turbulence are ubiquitously observed in nature, experiments and numerical simulations. The present study conducts a comparison…
A minimal phase-coupling model for intermittency in turbulent systems
José-Agustín Arguedas-Leiva, Enda Carroll, Luca Biferale +2
Turbulent systems exhibit a remarkable multi-scale complexity, in which spatial structures induce scale-dependent statistics with strong departures from Gaussianity. In Fourier spa…
An Efficient Particle Tracking Algorithm for Large-Scale Parallel Pseudo-Spectral Simulations of Turbulence
Cristian C. Lalescu, Bérenger Bramas, Markus Rampp +1
Particle tracking in large-scale numerical simulations of turbulent flows presents one of the major bottlenecks in parallel performance and scaling efficiency. Here, we describe a…
The statistical geometry of material loops in turbulence
Lukas Bentkamp, Theodore D. Drivas, Cristian C. Lalescu +1
Material elements - which are lines, surfaces, or volumes behaving as passive, non-diffusive markers - provide an inherently geometric window into the intricate dynamics of chaotic…
Frequency-dependent higher-order Stokes singularities near a planar elastic boundary: implications for the hydrodynamics of an active microswimmer near an elastic interface
Abdallah Daddi-Moussa-Ider, Christina Kurzthaler, Christian Hoell +6
The emerging field of self-driven active particles in fluid environments has recently created significant interest in the biophysics and bioengineering communities owing to their p…
Hydrodynamic coupling and rotational mobilities near planar elastic membranes
Abdallah Daddi-Moussa-Ider, Maciej Lisicki, Stephan Gekle +2
We study theoretically and numerically the coupling and rotational hydrodynamic interactions between spherical particles near a planar elastic membrane that exhibits resistance tow…
Flows and dynamos in a model of stellar radiative zones
Radostin D. Simitev, Friedrich H. Busse
Stellar radiative zones are typically assumed to be motionless in standard models of stellar structure but there is sound theoretical and observational evidence that this cannot be…
A reciprocal theorem for the prediction of the normal force induced on a particle translating parallel to an elastic membrane
Abdallah Daddi-Moussa-Ider, Bhargav Rallabandi, Stephan Gekle +1
When an elastic object is dragged through a viscous fluid tangent to a rigid boundary, it experiences a lift force perpendicular to its direction of motion. An analogous lift mecha…
Creeping motion of a solid particle inside a spherical elastic cavity
Abdallah Daddi-Moussa-Ider, Hartmut Löwen, Stephan Gekle
On the basis of the linear hydrodynamic equations, we present an analytical theory for the low-Reynolds-number motion of a solid particle moving inside a larger spherical elastic c…
3D tomography of cells in micro-channels
S. Quint, A. F. Christ, A. Guckenberger +4
We combine confocal imaging, microfluidics and image analysis to record 3D-images of cells in flow. This enables us to recover the full 3D representation of several hundred living…