Direct numerical simulation of bubble-induced turbulence

A Innocenti, A Jaccod, S Popinet… - Journal of Fluid …, 2021 - cambridge.org
We report on an investigation of bubble-induced turbulence. Bubbles of a size larger than
the dissipative scale cannot be treated as pointwise inclusions, and generate important …

Influence of density and viscosity on deformation, breakage, and coalescence of bubbles in turbulence

F Mangani, G Soligo, A Roccon, A Soldati - Physical Review Fluids, 2022 - APS
We investigate the effect of density and viscosity differences on a swarm of large and
deformable bubbles dispersed in a turbulent channel flow. For a given shear Reynolds …

[HTML][HTML] The role of breakup and coalescence in fine-scale bubble-induced turbulence. I. Dynamics

I Paul, B Fraga, MS Dodd, CCK Lai - Physics of Fluids, 2022 - pubs.aip.org
We study the effect of bubble breakup and coalescence on fine-scale dynamics of bubbly
turbulent flows using direct numerical simulations. We perform two different simulations of …

Two-phase stereo-PIV measurement techniques for gas-liquid two-phase flow—Methodology and validation

W Chen, G Huang, Y Hu, Y Song, J Yin… - Chemical Engineering …, 2024 - Elsevier
The bubbles and three-component (3C) velocity are of great significance in the investigation
of gas–liquid two-phase flows. In this study, two kinds of two-phase stereo-PIV measurement …

Turbulent bubble-laden channel flow of power-law fluids: A direct numerical simulation study

F Bräuer, E Trautner, J Hasslberger, P Cifani, M Klein - Fluids, 2021 - mdpi.com
The influence of non-Newtonian fluid behavior on the flow statistics of turbulent bubble-
laden downflow in a vertical channel is investigated. A Direct Numerical Simulation (DNS) …

Small-scale flow topologies, pseudo-turbulence, and impact on filtered drag models in turbulent fluidization

F Dabbagh, S Schneiderbauer - Physical Review Fluids, 2021 - APS
The small-scale flow structures in a moderately dense turbulent (gas-particle) fluidization are
investigated using highly resolved simulation data obtained from a kinetic-theory-based two …

How interfacial tension enhances drag in turbulent Taylor–Couette flow with neutrally buoyant and equally viscous droplets

J Su, YB Zhang, C Wang, L Yi, F Xu, Y Fan… - Journal of Fluid …, 2025 - cambridge.org
The presence of dispersed-phase droplets can result in a notable increase in a system's
drag. However, our understanding of the mechanism underlying this phenomenon remains …

Turbulent atomisation of im**ing jets under rising backpressure

E Wu, B Wang, WK Chong, A Yang, F Zhang… - Journal of Fluid …, 2025 - cambridge.org
This study employs direct numerical simulations to examine the effects of varying
backpressure conditions on the turbulent atomisation of im**ing liquid jets. Using the …

[HTML][HTML] Conditional and unconditional second-order structure functions in bubbly channel flows of power-law fluids

E Trautner, M Klein, F Bräuer, J Hasslberger - Physics of Fluids, 2021 - pubs.aip.org
The influence of non-Newtonian fluid behavior and the Eötvös number on conditional and
unconditional second-order structure functions of bubbly channel flows has been …

[HTML][HTML] Numerical investigation of the segregation of turbulent emulsions

T Trummler, A Begemann, E Trautner, M Klein - Physics of Fluids, 2022 - pubs.aip.org
We study the segregation of emulsions in decaying turbulence using direct numerical
simulations in combination with the volume of fluid method. To this end, we generate …