mechanism to release a uniform planar bubble swarm
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mechanism to release a uniform planar bubble swarm

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Published .
Written in English


  • Bubbles -- Analysis.,
  • Viscosity.

Book details:

Edition Notes

Statementby David Brian Hiller.
The Physical Object
Paginationx, 64 leaves, bound :
Number of Pages64
ID Numbers
Open LibraryOL14697407M

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Abstract. A stationary bubble-swarm has been used to aerate a mammalian cell culture bioreactor with an extremely low gas flow rate. Prolonging the residence time of the gas bubbles within the medium improved the efficiency of the gas transfer into the liquid phase and suppressed foam by: 6. the bubble swarm, the liquid-phase motion was affected by the center-gravity motion of each bubble. On the basis of these results, a coupling model between the liquid-phase motion induced by individual dispersed bubbles and the liquid-phase motion induced by the bubble swarm. 2 Experimental Set-Up Method of bubble swarm injection.   Thus, the present parametric study naturally complements the works by Bolaños-Jiménez et al., , Gutiérrez-Montes et al., , providing a deeper knowledge of the different mechanisms governing the dynamics of bubble formation in planar air–water co-flows, thereby allowing a better control of the generated by: 6. The result shows that the bubble swarm rises straightly when the jet Reynolds number is lower than 7, However, when the jet Reynolds number exce, the bubble swarm exhibits vortex‐like motion, and the bubble vortices oscillate periodically.

bubble population to the stream by performing electrolysis at electrodes shown at the tip of the device in figure 1. This paper will report on the effectiveness of adding an electrochemical bubble swarm (EBS) on surface cleaning, the effect of this cloud on ultrasonic transmission within the stream and the.   In his early seminal work ‘Fundamentals of the Hydrodynamic Mechanism of Splitting in Dispersion Processes’, Hinze [] identified three types of deformation of a fluid particle (e.g., air bubble): lenticular, cigar-shaped, and bulgy lenticular type is illustrated in Fig. 1a. For the lenticular case, the bubble becomes flattened and forms an oblate ellipsoid.   Planar Mechanisms 1. 7/24/ 1 Hareesha N G, Dept of Aero Engg, DSCE, Blore 2. UNIT 2: Mechanisms: • Quick return motion mechanisms: Drag link mechanism, Whitworth mechanism and Crank and slotted lever Mechanism. • Straight line motion mechanisms: Peaucellier’s mechanism and Robert’s mechanism. The simultaneous seismic and aseismic release of strain is typically explained by the rupture of seismic patches surrounded by aseismic creep. In fact, the focal mechanisms in some cases of subduction zone slow slip events are uniform and consistent with the main fault plane [e.g., Maury et al., ].

  In order to observe enough bubbles to represent a real swarm, but not so many that the mechanisms are hidden, a pulsed planar swarm of bubbles was released simultaneously into a test section 20 x cm square, and 2 m high. For a complete description of the apparatus and conditions see Stewart () and Hiller (). In multi-diameter bubble plumes, a bubble self-organisation takes place, i.e., small bubbles cluster in the center of the plume whilst large bubbles are found at the periphery of the plume.   P. Valiorgue, N. Souzy, H. M. El, H. B. Hadid, and S. Simoëns, “ Concentration measurement in the wake of a free rising bubble using planar laser-induced fluorescence (PLIF) with a calibration taking into account fluorescence extinction variations,” Exp. Flu ().   The estimated error, defined as the difference between the calculated bubble rise velocity, computed from the experimentally derived value of C D,swarm and the single bubble model of Tomiyama et al. (), is plotted with respect to bubble Reynolds number (Re b) in Fig. 8. Although many single bubble drag models have been proposed, the model.