103 citations · 313 across the 17 of their papers we have counts for
17 papers
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…
Drag reduction in surfactant-contaminated superhydrophobic channels at high Péclet numbers
Samuel D. Tomlinson, Frédéric Gibou, Paolo Luzzatto-Fegiz +3
Motivated by microfluidic applications, we investigate drag reduction in laminar pressure-driven flows in channels with streamwise-periodic superhydrophobic surfaces (SHSs) contami…
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…
Exogenous-endogenous surfactant interaction yields heterogeneous spreading in complex branching networks
Richard Mcnair, Fernando Temprano-Coleto, François J. Peaudecerf +4
Experiments have shown that surfactant introduced to a liquid-filled maze can find the solution path. We reveal how the maze-solving dynamics arise from interactions between the ad…
Unsteady evolution of slip and drag in surfactant-contaminated superhydrophobic channels
Samuel D. Tomlinson, Frédéric Gibou, Paolo Luzzatto-Fegiz +3
Recognising that surfactants can impede the drag reduction resulting from superhydrophobic surfaces (SHSs), we investigate the impact of spatio-temporal fluctuations in surfactant…
Real-time Manipulation of Liquid Droplets using Photo-responsive Surfactant
Xichen Liang, Kseniia M. Karnaukh, Lei Zhao +12
Fast and programmable transport of liquid droplets on a solid substrate is desirable in microfluidic, thermal, biomedical, and energy devices. Past research has focused on designin…
A model for slip and drag in turbulent flows over superhydrophobic surfaces with surfactant
Samuel D. Tomlinson, François Peaudecerf, Fernando Temprano-Coleto +4
Superhydrophobic surfaces (SHSs) can reduce the friction drag in turbulent flows. In the laminar regime, it has been shown that trace amounts of surfactant can negate this drag red…
Laminar drag reduction in surfactant-contaminated superhydrophobic channels
Samuel D. Tomlinson, Frédéric Gibou, Paolo Luzzatto-Fegiz +3
While superhydrophobic surfaces (SHSs) show promise for drag reduction applications, their performance can be compromised by traces of surfactant, which generate Marangoni stresses…
Simultaneous PIV and LIF measurements in stratified flows using pulsed lasers
Paolo Luzzatto-Fegiz
We examine the problem of performing simultaneous and coplanar Particle Image Velocimetry (PIV) and Laser-Induced Fluorescence (LIF) measurements in a stratified fluid initially at…
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…
A single parameter can predict surfactant impairment of superhydrophobic drag reduction
Fernando Temprano-Coleto, Scott M. Smith, François J. Peaudecerf +3
Recent experimental and computational investigations have shown that trace amounts of surfactants, unavoidable in practice, can critically impair the drag reduction of superhydroph…
An entrainment-based model for annular wakes, with applications to airborne wind energy
Sam Kaufman-Martin, Nicholas Naclerio, Pedro May +1
Several novel wind energy systems produce wakes with annular cross-sections, which are qualitatively different from the wakes with circular cross-sections commonly generated by con…
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…
A theory for the slip and drag of superhydrophobic surfaces with surfactant
Julien R. Landel, François J. Peaudecerf, Fernando Temprano-Coleto +3
Superhydrophobic surfaces (SHSs) have the potential to reduce drag at solid boundaries. However, multiple independent studies have recently shown that small amounts of surfactant,…
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…
An entrainment model for fully-developed wind farms: effects of atmospheric stability and an ideal limit for wind farm performance
Paolo Luzzatto-Fegiz, Colm-cille P. Caulfield
While a theoretical limit has long been established for the performance of a single turbine, no corresponding upper bound exists for the power output from a large wind farm, making…
Traces of surfactants can severely limit the drag reduction of superhydrophobic surfaces
François J. Peaudecerf, Julien R. Landel, Raymond E. Goldstein +1
Superhydrophobic surfaces (SHSs) have the potential to achieve large drag reduction for internal and external flow applications. However, experiments have shown inconsistent result…