[HTML][HTML] A three-phase Eulerian–Lagrangian model to simulate mixing and oxygen transfer in activated sludge treatment

B Chen, B Fraga, H Hemida - International Journal of Multiphase Flow, 2023 - Elsevier
We introduce a novel modelling tool for the activated sludge process (ASP) based on large-
eddy simulation and multiphase Eulerian-Lagrangian coupling. Aeration-driven sludge …

Vortex ring and bubble interaction: Effects of bubble size on vorticity dynamics and bubble dynamics

S Biswas, RN Govardhan - Physics of Fluids, 2023 - pubs.aip.org
Bubbly turbulent flows involve complex interactions between bubbles and vortices, in which
their size ratio plays a critical role. The present work investigates an idealization, namely, the …

A discontinuous cavitation model (DCM)

J Zheng, Y Gu, Y Wei, W Chen, C Li, X Han, Z Wang - Physics of Fluids, 2024 - pubs.aip.org
A discontinuous cavitation model (DCM) containing the effects of ambient overpressure,
incondensable gas, inertia, viscosity, surface tension, characteristic nuclei size, and …

[HTML][HTML] Influence of thermal stratification on the transport of polydispersed expiratory particles

A Monka, B Fraga, D Soper, H Hemida - Physics of Fluids, 2023 - pubs.aip.org
The fluid dynamics of expiratory events are complex, and understanding how indoor air
conditions affect this and the spread of exhaled material is crucial to the prevention of large …

Coherent structures, turbulence intermittency, and anisotropy of gravity currents propagating on a rough and porous bed

D Han, Y Guo, P Jiao, Y Yuan, YT Lin, Z He - Physics of Fluids, 2023 - pubs.aip.org
This study experimentally investigated the impacts of rough and porous (RP) bed and
sedimentation processes on the coherent structures, turbulence intermittency, and …

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

I Paul, B Fraga, MS Dodd, CCK Lai - Physics of Fluids, 2022 - pubs.aip.org
This second part of our research explores the kinematic aspect of fine-scale bubble-induced
turbulence (BIT) to (i) present the effect of bubble breakup and coalescence and (ii) compare …

Morphology of clean and surfactant-laden droplets in homogeneous isotropic turbulence

I Cannon, G Soligo, ME Rosti - Journal of Fluid Mechanics, 2024 - cambridge.org
We perform direct numerical simulations of surfactant-laden droplets in homogeneous
isotropic turbulence with Taylor Reynolds number is the droplet characteristic size. We …

A mesoscale bubble-induced turbulence model and simulation of gas–liquid flows

Y Jiao, L Wang, J Chen - Physics of Fluids, 2023 - pubs.aip.org
In gas–liquid two-phase flows, bubble motion significantly affects liquid phase turbulence,
and adding bubble-induced turbulence (BIT) source term is widely used to improve the …

Turbulent structures of gravity currents propagating over a rough-permeable bed

D Han, YT Lin, Y Guo, Z He - 2025 - essopenarchive.org
This chapter experimentally investigated the impacts of rough-impermeable/permeable beds
on turbulent kinetic energy (TKE), turbulence intermittency, and anisotropy of gravity …

Large Eddy Simulation of turbulent dispersed multi-phase flows for engineering applications-development of Eulerian-Lagrangian algorithms

B Chen - 2023 - etheses.bham.ac.uk
This PhD thesis presents a numerical investigation of turbulent dispersed multiphase flows
based on Large-Eddy simulation (LES). A wide range of engineering scenarios involve …