Showing 2024 · physics.flu-dynShow all

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physics.flu-dyn2024★ 2 cited

Analysis of soot formation in a lab-scale Rich-Quench-Lean combustor using LES with tabulated chemistry

Leonardo Pachano, Abhijit Kalbhor, Daniel Mira +1

A numerical study of the effects of air dilution on soot formation and particle dynamics in a lab-scale rich-quench-lean (RQL) combustor is presented using large-eddy simulations (…

physics.flu-dyn2024★ 1 cited

Extensions to the Navier-Stokes-Fourier Equations for Rarefied Transport: Variational Multiscale Moment Methods for the Boltzmann Equation

F. A. Baidoo, I. M. Gamba, T. J. R. Hughes +1

We derive a fourth order entropy stable extension of the Navier-Stokes-Fourier equations into the transition regime of rarefied gases. We do this through a novel reformulation of t…

physics.flu-dyn2024★ 6 cited

Odd viscosity suppresses intermittency in direct turbulent cascades

Sihan Chen, Xander M. de Wit, Michel Fruchart +2

Intermittency refers to the broken self-similarity of turbulent flows caused by anomalous spatio-temporal fluctuations. In this Letter, we ask how intermittency is affected by a no…

physics.flu-dyn2024★ 4 cited

Efficient point-based simulation of four-way coupled particles in turbulence at high number density

Xander M. de Wit, Rudie P. J. Kunnen, Herman J. H. Clercx +1

In many natural and industrial applications, turbulent flows encompass some form of dispersed particles. Although this type of multiphase turbulent flow is omnipresent, its numeric…

physics.flu-dyn2024★ 4 cited

Kinetic data-driven approach to turbulence subgrid modeling

Giulio Ortali, Alessandro Gabbana, Nicola Demo +2

Numerical simulations of turbulent flows are well known to pose extreme computational challenges due to the huge number of dynamical degrees of freedom required to correctly descri…

physics.flu-dyn2024★ 4 cited

Localization-delocalization transition for light particles in turbulence

Ziqi Wang, Xander M de Wit, Federico Toschi

Small bubbles in fluids raise to the surface due to Archimede's force. Remarkably, in turbulent flows this process is severely hindered by the presence of vortex filaments, which a…

physics.flu-dyn2024★ 14 cited

Extreme statistics and extreme events in dynamical models of turbulence

Xander M. de Wit, Giulio Ortali, Alessandro Corbetta +3

We present a study of the intermittent properties of a shell model of turbulence with unprecedented statistics, about eddy turn over time, achieved thanks to an impleme…

physics.flu-dyn2024★ 26 cited

Characterizing and visualizing the direct injection of hydrogen into high-pressure argon and nitrogen environments

Max Peters, Noud Maes, Nico Dam +1

Using argon as the working fluid in an internal combustion engine holds the potential of substantially enhancing thermal efficiency because of its high specific heat ratio. Burning…