3.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of OsloNO153 papers
- Centre National de la Recherche ScientifiqueFR139 papers
- KTH Royal Institute of TechnologySE92 papers
- SINTEFNO92 papers
- Johannes Gutenberg University MainzDE57 papers
- Delft University of TechnologyNL56 papers
- University of CopenhagenDK55 papers
- ETH ZurichCH46 papers
- Tomsk State Pedagogical UniversityRU44 papers
- University of CambridgeGB41 papers
- Stockholm UniversitySE40 papers
- Eindhoven University of TechnologyNL38 papers
109 papers · 1 filter
Simultaneous free-surface profilometry and subsurface velocimetry with fringe projection and PIV
Ali Semati, Adharsh Shankaran, Benjamin K. Smeltzer +3
This work presents a novel combination of two well-established techniques: fringe projection profilometry (FPP) and particle image velocimetry (PIV). Despite seemingly conflicting…
Pressure drop-flow rate nonlinearity in bubble trains through a capillary bundle
Paolo Botticini, Davide Picchi, Santanu Sinha +1
We investigate the effective rheology of a train of elongated bubbles of negligible viscosity flowing in capillary tubes. Building upon the classical Bretherton theory for a single…
Mapping surface height dynamics to subsurface flow physics in free-surface turbulent flow using a shallow recurrent decoder
Kristoffer S. Moen, Jørgen R. Aarnes, Simen Å. Ellingsen +1
Near-surface turbulent flows beneath a free surface are reconstructed from sparse measurements of the surface height variation, by a neural network algorithm known as the SHallow R…
Experimental investigation relating free-surface features to sub-surface turbulence
Omer M. Babiker, Jørgen R. Aarnes, Ali Semati +4
Turbulent flows beneath a free surface play a central role in the Earth system, yet their coupling to observable surface features remains incompletely understood. Recent studies us…
Turbulence-induced anti-Stokes flow: experiments and theory
Simen Å. Ellingsen, Olav Rømcke, Benjamin K. Smeltzer +4
We report experimental evidence of an Eulerian-mean flow, , created by the interaction of surface waves and tailored ambient sub-surface turbulence, which partly c…
Experimental and theoretical investigation of drag loads on side-by-side flexible blades in a uniform current
Zhilong Wei, Trygve Kristiansen, David Kristiansen +1
This study investigates the hydrodynamic drag force on side-by-side flexible blades in a uniform steady current through experimental and theoretical approaches. Four different blad…
Interface instability of two-phase flow in a three-dimensional porous medium
Joachim Falck Brodin, Kevin Pierce, Paula Reis +4
We present an experimental study of immiscible, two-phase fluid flow through a three-dimensional porous medium consisting of randomly-packed, monodisperse glass spheres. Our experi…
Vortex structures under dimples and scars in turbulent free-surface flows
Jørgen R. Aarnes, Omer Babiker, Anqing Xuan +2
Turbulence beneath a free surface leaves characteristic long-lived signatures on the surface, such as upwelling 'boils', near-circular 'dimples' and elongated 'scars', easily ident…
A real-time digital twin of azimuthal thermoacoustic instabilities
Andrea Nóvoa, Nicolas Noiray, James R. Dawson +1
When they occur, azimuthal thermoacoustic oscillations can detrimentally affect the safe operation of gas turbines and aeroengines. We develop a real-time digital twin of azimuthal…
A simplified pore-scale model for slow drainage including film-flow effects
Paula Reis, Marcel Moura, Gaute Linga +3
Film flow through networks of corners and capillary bridges can establish connections between seemingly isolated clusters during drainage in porous media. Coupled with drainage thr…
Statistics of weakly nonlinear waves on currents with strong vertical shear
Zibo Zheng, Yan Li, Simen Å Ellingsen
We investigate how the presence of a vertically sheared current affects wave statistics, including the probability of rogue waves, and apply it to a real-world case using measured…
Local Statistics of Immiscible and Incompressible Two-Phase Flow in Porous Media
Hursanay Fyhn, Santanu Sinha, Alex Hansen
We consider immiscible and incompressible two-phase flow in porous media under steady-state conditions using a dynamic pore network model. We focus on the fluctuations in a Represe…
Relative permeability as a stationary process: energy fluctuations in immiscible displacement
James E. McClure, Ming Fan, Steffen Berg +4
Relative permeability is commonly used to model immiscible fluid flow through porous materials. In this work we derive the relative permeability relationship from conservation of e…
Viscoelasticity of suspension of red blood cells under oscillatory shear flow
Naoki Takeishi, Marco Edoardo Rosti, Naoto Yokoyama +1
We present a numerical analysis of the rheology of a suspension of red blood cells (RBCs) for different volume fractions in a wall-bounded, effectively inertialess, small amplitude…
The interaction of droplet dynamics and turbulence cascade
Marco Crialesi-Esposito, Sergio Chibbaro, Luca Brandt
The dynamics of droplet fragmentation in turbulence is described in the Kolmogorov-Hinze framework. Yet, a quantitative theory is lacking at higher concentrations when strong inter…
Competing gravitational and viscous efects in 3D two-phase flow investigated with a table-top optical scanner
Joachim Falck Brodin, Per Arne Rikvold, Marcel Moura +2
We present experiments and theory describing the transition from viscosity-stabilized flow to gravitationally unstable fingering for two-phase flow in a 3D synthetic porous medium.…
Current Mapping from the Wave Spectrum
Benjamin K. Smeltzer, Simen Å. Ellingsen
In this chapter we review methods by which near--surface ocean currents can be measured remotely using images of the water surface, as obtained by X-band radar in particular. The p…
Evaporating Rayleigh-Bénard convection: prediction of interface temperature and global heat transfer modulation
Nicoló Scapin, Andreas D. Demou, Luca Brandt
We propose an analytical model to estimate the interface temperature and the Nusselt number for an evaporating two-layer Rayleigh-Bénard configuration in statistically s…
FluTAS: A GPU-accelerated finite difference code for multiphase flows
Marco Crialesi-Esposito, Nicolo Scapin, Andreas D. Demou +4
We present the Fluid Transport Accelerated Solver, FluTAS, a scalable GPU code for multiphase flows with thermal effects. The code solves the incompressible Navier-Stokes equation…
Numerical simulation of the coalescence-induced polymeric droplet jumping on superhydrophobic surfaces
Kazem Bazesefidpar, Luca Brandt, Outi Tammisola
Self-propelled jumping of two polymeric droplets on superhydrophobic surfaces is investigated by three-dimensional direct numerical simulations. Two identical droplets of a viscoel…
Frame invariant neural network closures for Kraichnan turbulence
Suraj Pawar, Omer San, Adil Rasheed +1
Numerical simulations of geophysical and atmospheric flows have to rely on parameterizations of subgrid scale processes due to their limited spatial resolution. Despite substantial…
Investigation of Flight Conditions where Box-Wing Outperforms Mono-Wing Configurations for Small UAVs
Jasmine Jerry Aloor, Bikalpa Bomjan Gurung, Gauri Wadhwa +3
We investigate the aerodynamic efficiency and flight dynamics of mono-wing and box-wing configurations across various parameters, including aspect ratio, velocity, and lift require…
A dual resolution phase-field solver for wetting of viscoelastic droplets
Kazem Bazesefidpar, Luca Brandt, Outi Tammisola
We present a new and efficient phase-field solver for viscoelastic fluids with moving contact line based on a dual-resolution strategy. The interface between two immiscible fluids…
Nonlinear proper orthogonal decomposition for convection-dominated flows
Shady E. Ahmed, Omer San, Adil Rasheed +1
Autoencoder techniques find increasingly common use in reduced order modeling as a means to create a latent space. This reduced order representation offers a modular data-driven mo…