# On bubble clustering and energy spectra in pseudo-turbulence

@article{Martnez2010OnBC, title={On bubble clustering and energy spectra in pseudo-turbulence}, author={J. Mart{\'i}nez and Daniel Chehata and Dennis P. M. van Gils and C. K. Sun and Detlef Lohse}, journal={Journal of Fluid Mechanics}, year={2010}, volume={650}, pages={287 - 306} }

Three-dimensional particle tracking velocimetry (PTV) and phase-sensitive constant temperature anemometry in pseudo-turbulence – i.e. flow solely driven by rising bubbles – were performed to investigate bubble clustering and to obtain the mean bubble rise velocity, distributions of bubble velocities and energy spectra at dilute gas concentrations (α ≤ 2.2 %). To characterize the clustering the pair correlation function G(r, θ) was calculated. The deformable bubbles with equivalent bubble… Expand

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#### References

SHOWING 1-10 OF 68 REFERENCES

The effect of bubbles on developed turbulence

- Physics
- 2004

Hot-film anemometry measurements are performed in a fully developed turbulent bubbly flow. For the bubble detection in the signal, both a threshold method and a new pattern recognition algorithm are… Expand

Dimensionality and morphology of particle and bubble clusters in turbulent flow

- Physics
- Journal of Fluid Mechanics
- 2008

We conduct numerical experiments to investigate the spatial clustering of particles and bubbles in simulations of homogeneous and isotropic turbulence. On varying the Stokes parameter and the… Expand

Quantifying microbubble clustering in turbulent flow from single-point measurements

- Physics
- 2008

Single-point hot-wire measurements in the bulk of a turbulent channel have been performed in order to detect and quantify the phenomenon of preferential bubble accumulation. We show that statistical… Expand

Measurements of the average properties of a suspension of bubbles rising in a vertical channel

- Physics
- Journal of Fluid Mechanics
- 2001

Experiments were performed in a vertical channel to study the behaviour of a monodisperse bubble suspension for which the dual limit of large Reynolds number and small Weber number was satisfied.… Expand

Turbulence energy distributions in bubbling gas–liquid and gas–liquid–solid flow systems

- Physics
- 2004

Abstract The turbulence energy distributions in the gas–liquid bubble column system and the effect of solids on the turbulence are investigated using the laser Doppler velocimetry and the particle… Expand

Experimental characterization of the agitation generated by bubbles rising at high Reynolds number

- Physics
- Journal of Fluid Mechanics
- 2009

An experimental investigation of the flow generated by a homogeneous population of bubbles rising in water is reported for three different bubble diameters (d = 1.6, 2.1 and 2.5 mm) and moderate gas… Expand

Dynamics of homogeneous bubbly flows Part 2. Velocity fluctuations

- Physics
- Journal of Fluid Mechanics
- 2002

Direct numerical simulations of the motion of up to 216 three-dimensional buoyant bubbles in periodic domains are presented. The bubbles are nearly spherical and have a rise Reynolds number of about… Expand

The mean rise velocity of pairwise-interacting bubbles in liquid

- Physics
- 1993

This paper is concerned with calculations regarding a collection of small gas bubbles rising under buoyancy in a clear liquid. For dilute mixtures interactions can be restricted to those between two… Expand

Velocity fluctuations in a homogeneous dilute dispersion of high-Reynolds-number rising bubbles

- Physics
- Journal of Fluid Mechanics
- 2002

An experimental investigation of a homogeneous swarm of rising bubbles is presented. The experimental arrangement ensures that all the bubbles have the same equivalent radius, a = 1.25 mm. This… Expand

Large-scale velocity structures in turbulent thermal convection.

- Physics, Medicine
- Physical review. E, Statistical, nonlinear, and soft matter physics
- 2001

A systematic study of large-scale velocity structures in turbulent thermal convection is carried out in three different aspect-ratio cells filled with water, revealing a unique driving mechanism for the large- scale coherent rotation in turbulent convection. Expand