130 citations · 356 across the 19 of their papers we have counts for
19 papers
Drafting-Kissing-Tumbling Dynamics of Two Particles Subjected to Horizontal Oscillations
Fabian Kleischmann, Bernhard Vowinckel
We investigate the effects of horizontal oscillations on the drafting--kissing--tumbling (DKT) dynamics of two monodisperse spherical particles settling under gravity in a viscous…
Effects of permeability on hindered settling of porous particles
Alexander Metelkin, Bernhard Vowinckel
We investigate the settling behavior of suspensions of highly porous and permeable particles in the viscous regime using particle-resolved direct numerical simulations (DNS). The s…
A Data-Driven Approach for Predicting Hydrodynamic Forces on Spherical Particles Using Volume Fraction Representations
Alexander Metelkin, Sam Jacob Jacob, Bernhard Vowinckel
Particle-laden flows are simulated at various scales using numerical techniques that range from particle-resolved Direct Numerical Simulations (pr-DNS) for small-scale systems to L…
Long-term microgravity experiments reveal a new mechanism for particle aggregation in suspension
Fabian Kleischmann, Bernhard Vowinckel, Eckart Meiburg +1
Microgravity experiments on board the International Space Station, combined with particle-resolved direct numerical simulations, were conducted to investigate the long-term floccul…
Tangential Forces Govern the Viscous-Inertial Transition in Dense Frictional Suspensions
Sudarshan Konidena, Franco Tapia, Alireza Khodabakhshi +3
We present particle-resolved simulations of dense frictional suspensions undergoing the viscous-inertial transition using pressure-imposed rheology. By varying the fluid viscosity,…
On the parameters of common settling velocity models for porous sediment aggregates
Alexander Metelkin, Bernhard Vowinckel
The settling behavior of sediment aggregates is a critical factor influencing the transport of fine-grained sediments in riverine and marine environments. Due to the small size and…
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…
Pairwise interaction of spherical particles aligned in oscillatory flow
Fabian Kleischmann, Paolo Luzzatto-Fegiz, Eckart Meiburg +1
We present a systematic simulation campaign to investigate the pairwise interaction of two mobile, monodisperse particles submerged in a viscous fluid and subjected to monochromati…
Particle-resolved simulation of antidunes in free-surface flows
Christoph Schwarzmeier, Christoph Rettinger, Samuel Kemmler +5
The interaction of supercritical turbulent flows with granular sediment beds is challenging to study both experimentally and numerically; this challenging task has hampered the adv…
A simple criterion and experiments for onset of flocculation in kaolin clay suspensions
Nicholas Rommelfanger, Bernhard Vowinckel, Zixuan Wang +3
Cohesive effects between fine-grained sediment particles greatly influence their effective settling rate and erodibility. Many studies have observed a qualitative difference in set…
Particle-resolved simulations of four-way coupled, polydispersed, particle-laden flows
Yinuo Yao, Edward Biegert, Bernhard Vowinckel +5
We present a collocated-grid framework for Direct Numerical Simulations of polydisperse particles submerged in a viscous fluid. The fluid-particle forces are coupled with the Immer…
Flocculation of suspended cohesive particles in homogeneous isotropic turbulence
K. Zhao, F. Pomes, B. Vowinckel +3
We investigate the dynamics of cohesive particles in homogeneous isotropic turbulence, based on one-way coupled simulations that include Stokes drag, lubrication, cohesive and dire…
Rheology of mobile sediment beds sheared by viscous, pressure-driven flows
B. Vowinckel, E. Biegert, E. Meiburg +2
We present a detailed comparison of the rheological behaviour of sheared sediment beds in a pressure-driven, straight channel configuration based on data that was generated by mean…
Rheology of mobile sediment beds in laminar shear flow: effects of creep and polydispersity
Christoph Rettinger, Sebastian Eibl, Ulrich Rüde +1
Classical scaling relationships for rheological quantities such as the -rheology have become increasingly popular for closures of two-phase flow modeling. However, these fram…
An efficient cellular flow model for cohesive particle flocculation in turbulence
K. Zhao, B. Vowinckel, T. -J. Hsu +3
We propose a one-way coupled model that tracks individual primary particles in a conceptually simple cellular flow setup to predict flocculation in turbulence. This computationally…
Consolidation of freshly deposited cohesive and non-cohesive sediment: particle-resolved simulations
Bernhard Vowinckel, Edward Biegert, Paolo Luzzatto-Fegiz +1
We analyze the consolidation of freshly deposited cohesive and non-cohesive sediment by means of particle-resolved direct Navier-Stokes simulations based on the Immersed Boundary M…
Momentum balance of a laminar flow over a bed of particles
E. Biegert, B. Vowinckel, E. Meiburg
We develop a framework for analyzing the momentum balance of laminar particle-laden flows based on immersed boundary methods, which solve the Navier-Stokes equations and resolve th…
Settling of cohesive sediment: particle-resolved simulations
B. Vowinckel, J. Withers, P. Luzzatto-Fegiz +1
We develop a physical and computational model for performing fully coupled, particle-resolved Direct Numerical Simulations of cohesive sediment, based on the Immersed Boundary Meth…
A collision model for grain-resolving simulations of flows over dense, mobile, polydisperse granular sediment beds
Edward Biegert, Bernhard Vowinckel, Eckart Meiburg
We present a collision model for phase-resolved Direct Numerical Simulations of sediment transport that couple the fluid and particles by the Immersed Boundary Method. Typically, a…