Frictional drag reduction by bubble injection

Y Murai - Experiments in fluids, 2014 - Springer
The injection of gas bubbles into a turbulent boundary layer of a liquid phase has multiple
different impacts on the original flow structure. Frictional drag reduction is a phenomenon …

CFD modeling of bubble-induced turbulence

R Rzehak, E Krepper - International Journal of Multiphase Flow, 2013 - Elsevier
Modeling of bubble-induced turbulence in dispersed gas–liquid multiphase flow is an
important but still unresolved issue. Aside from its intrinsic interest, turbulence in this type of …

Multiphase turbulence in bubbly flows: RANS simulations

M Colombo, M Fairweather - International Journal of Multiphase Flow, 2015 - Elsevier
The ability of a two-fluid Eulerian–Eulerian computational multiphase fluid dynamic model to
predict bubbly air–water flows is studied. Upward and downward pipe flows are considered …

Euler–Euler multiphase CFD-simulation with full Reynolds stress model and anisotropic bubble-induced turbulence

J Parekh, R Rzehak - International Journal of Multiphase Flow, 2018 - Elsevier
In the present work, Euler–Euler modeling of bubbly flows is combined with a full Reynolds
stress model for the turbulence in the liquid carrier phase. Reynolds stress models have only …

Modulation of turbulence intensity by heavy finite-size particles in upward channel flow

Z Yu, Y **a, Y Guo, J Lin - Journal of Fluid Mechanics, 2021 - cambridge.org
It has been recognized that, generally, large particles enhance the turbulence intensity,
while small particles attenuate the turbulence intensity. However, there has been no …

Application of a novel model for bubble-induced turbulence to bubbly flows in containers and vertical pipes

Y Liao, T Ma, E Krepper, D Lucas, J Fröhlich - Chemical Engineering …, 2019 - Elsevier
The baseline model for the CFD-simulation of turbulent bubbly flows in the Euler-Euler
framework was proposed several years ago. It defines a fixed set of closures including all …

A generalized multiphase modelling approach for multiscale flows

A De Santis, M Colombo, BC Hanson… - Journal of Computational …, 2021 - Elsevier
Multiphase flows are ubiquitous both in nature and industry. A broad range of interfacial
scales, ranging from fine dispersions to large segregated interfaces, is often observed in …

Coupling of CFD with DPBM for an RDC extractor

C Drumm, MM Attarakih, HJ Bart - Chemical engineering science, 2009 - Elsevier
For the design of counter-current liquid–liquid extraction columns, there is a strong industrial
demand for more straightforward, faster and money-saving simulation methods. One …

Lift force acting on single bubbles in linear shear flows

S Aoyama, K Hayashi, S Hosokawa, D Lucas… - International Journal of …, 2017 - Elsevier
Lift coefficients, CL, of single bubbles in linear shear flows are measured to investigate
effects of the bubble shape, the liquid velocity gradient and the fluid property on C L. The …

A comprehensive sub-grid air entrainment model for RaNS modeling of free-surface bubbly flows

J Ma, AA Oberai, DA Drew… - The Journal of …, 2011 - journals.sagepub.com
The simulation of free surface bubbly flows using a two-fluid model remains a challenging
problem in part due to the lack of a comprehensive air entrainment model that can predict …