Light Particles in Turbulent Flows (Twente Water Tunnel)

Dispersed bubbly flow has attracted much interest, both from a fundamental point of view and because of its widespread occurrence in industrial applications. In dispersed flows, the hydrodynamic interaction between the two-phases and the inertia of the small bubbles (which are called ‘light particles’) result in an inhomogeneous distribution of the particles. We characterize the properties of two-phase turbulent flows using the Twente Water Tunnel.

Twente Water Tunnel

The Twente Water Tunnel (see Figure 1) is an 8m high facility in which strong turbulence (up to a Taylor-Reynolds number of 400) can be created thanks to an active grid. The tunnel was designed for studying both single and two-phase turbulent flows. The downward average velocity is up to 90 cm/s in the measurement section.  Nearly monodispersed bubbles with varying diameters (from 100µm to 5 mm) can be injected with a concentration up to 10%. The transparent measurement section with 2×0.45×0.45 m3 allows for optical techniques in the tunnel. The instrumentation includes 3D Particle Tracking Velocimetry (see Fig 2), 3D Particle Image Velocimetry, phase-sensitive hot-film anemometry, and Laser Doppler Anemometry.

Figure 1: Twente Water Tunnel

The questions we address are:

Figure 2: Instantaneous 3D bubble positions measured with 3D Particle Tracking Velocimetry.

Info: Detlef Lohse and Chao Sun

Researchers: Ramon van den Berg, Daniel Chehata Gómez, Julián Martínez Mercado, Vivek Nagendra Prakash, Varghese Mathai, Jon Brons, Detlef Lohse, Chao Sun.
Collaborators: Hans Kuipers (FCRE-group U. Twente),  J.-F. Pinton (l'École normale supérieure de Lyon), Federico Toschi (TU Eindhoven), ICTR International Collaboration for Turbulence Research.
Embedding: JMBC, European Research Network on Turbulence, ICTR International Collaboration for Turbulence Research, EuHIT
Sponsors:  European Research Network on Turbulence, FOM, AkzoNobel, TataSteel, DSM, Shell


On bubble clustering and energy spectra in pseudo-turbulence[arΧiv]
J. Martínez Mercado, D. Chehata Gómez, D.P.M. van Gils, C. Sun, and D. Lohse
J. Fluid Mech. 650, 287–306 (2010)BibTeΧ
Evolution of energy in flow driven by rising bubbles[arΧiv]
I. Mazzitelli and D. Lohse
Phys. Rev. E 79, 066317 (2009)BibTeΧ
Particles go with the flow
D. Lohse
Phys. 1, 18 (2008)BibTeΧ
Dimensionality and morphology of particle and bubble clusters in turbulent flow[arΧiv]
E. Calzavarini, M. Kerscher, D. Lohse, and F. Toschi
J. Fluid Mech. 607, 13–24 (2008)BibTeΧ
Universal Intermittent Properties of Particle Trajectories in Highly Turbulent Flows
A. Arnèodo, R. Benzi, J. Berg, L. Biferale, E. Bodenschatz, A. Busse, E. Calzavarini, B. Castaing, M. Cencini, L. Chevillard, R. Fisher, R. Grauer, H. Homann, D. Lamb, A.S. Lanotte, E. Lévèque, B. Lüthi, J. Mann, N. Mordant, W.C. Müller, S. Ott, N.T. Ouellette, J.F. Pinton, S.B. Pope, S.G. Roux, F. Toschi, H. Xu, and P.K. Yeung
Phys. Rev. Lett. 100, 254504 (2008)BibTeΧ
Quantifying Turbulence-Induced Segregation of Inertial Particles[arΧiv]
E. Calzavarini, M. Cencini, D. Lohse, and F. Toschi
Phys. Rev. Lett. 101, 084504 (2008)BibTeΧ
Energy spectra in microbubbly turbulence
T.H. van den Berg, S. Luther, and D. Lohse
Phys. Fluids 18, 038103 (2006)BibTeΧ
Hot-film anemometry in bubbly flow I: bubble–probe interaction
J. Rensen, S. Luther, J. de Vries, and D. Lohse
Int. J. Multiphase Flow 31, 285 – 301 (2005)BibTeΧ
The effect of bubbles on developed turbulence
J. Rensen, S. Luther, and D. Lohse
J. Fluid Mech. 538, 153–187 (2005)BibTeΧ
On the relevance of the lift force in bubbly turbulence
I. Mazzitelli, D. Lohse, and F. Toschi
J. Fluid Mech. 488, 283–313 (2003)BibTeΧ
The effect of microbubbles on developed turbulence
I. Mazzitelli, D. Lohse, and F. Toschi
Phys. Fluids 15, L5–L8 (2002)BibTeΧ
Induced bubble shape oscillations and their impact on the rise velocity
J. de Vries, S. Luther, and D. Lohse
European Physical Journal B 29, 503–509 (2002)BibTeΧ


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