Turbulent bubbling flow

In the turbulent bubbly flow region, Harmathy (1960) suggested... 

Zun, I., 1988, Transition from Wall Void Peaking to Core Void Peaking in Turbulent Bubbly Flow, in Transient Phenomena in Multiphase Flow, ICHMT Int. Seminar, N. H. Afgan, Ed., pp. 225-245, Hemisphere, Washington, DC. (3)... 

Lathouwers, D., Modelling and simulation of turbulent bubbly flow , Ph.D. Thesis, Delft University of Technology, Delft, Netherlands (1999). 

Steady bubble diameter in turbulent bubble flow Diameter of particle Number-averaged mean bubble diameter Volume-surface mean bubble diameter... 

Lance and Bataille [78] studied grid-generated turbulent bubbly flow in a 45 (cm) X 45 (cm) rectangular pipe. Laser-Doppler and hotfilm anemometry were used for the experimental investigation. The high-frequency of spectra of the velocity components were determined by the power —8/3. A decade later Mudde et al [102] reported LDA-measurements characterizing 15 (cm) and... 

Tomiyama [148] and Tomiyama and Shimada [150] adopted a N + 1)-fluid model for the prediction of 3D unsteady turbulent bubbly flows with non-uniform bubble sizes. Among the N + l)-fluids, one fluid corresponds to the liquid phase and the N fluids to gas bubbles. To demonstrate the potential of the proposed method, unsteady bubble plumes in a water filled vessel were simulated using both (3 + l)-fluid and two-fluid models. The gas bubbles were classified and fixed in three groups only, thus a (3 + 1)- or four-fluid model was used. The dispersions investigated were very dilute thus the bubble coalescence and breakage phenomena were neglected, whereas the inertia terms were retained in the 3 bubble phase momentum equations. No population balance model was then needed, and the phase continuity equations were solved for all phases. It was confirmed that the (3 + l)-fluid model gave better predictions than the two-fluid model for bubble plumes with non-uniform bubble... 

Lathouwers D (1999) Modeling and simulation of turbulent bubbly flow. PhD thesis, the Technical University in Delft, the Netherlands... 

Troshko AA, Hassan YA (2001) A two-equation turbulence model of turbulent bubbly flows. Int J Multiphase Flow 27(ll) 1965-2000... 

Bel F dhila R, Siminin O (1992) Eulerian prediction of a turbulent bubbly flow downstream of a sudden pipe expansion. Proc 6th Workshop on Two-Phase Flow Predictions, Erlangen, ERG, March 30-April 2, pp 264-273... 

Saraiva PC, Azevedo JLT, Carvalho MG (1993) Mathematical Simulation of a Circulating Fluidized Bed Combustor. Combust Sci and Tech 93 223-243 Simonin O, Viollet PL (1989) Numerical study on phase dispersion mechanisms in turbulent bubbly flows. Proc Int Conf on Mechanics of Two-Phase Flows, 12-15 June, Taipei, Taiwan... 

Columns with gas distributor (porous sintered plate, perforated plate, sieve tray, spigots, nozzles), gas flows cocurrently or counter-currently through a continous liquid phase in form of bubbles or gas jets homogenous (quasi-laminar) bubble flow, is characterized by a large interfacial area and little backmixing with equal bubbles at a superficial gas velocity Wg < 0.05 m/s. Bubble coalescence to form larger bubble, bubble splits, heterogenous (turbulent) bubble flow may be observed at Wg > 0.05 m/s. = 1 m/s gas load-... 

Tomiyama [167] and Tomiyama and Shimada [169] adopted a (A -i- l)-fluid model for the prediction of 3D unsteady turbulent bubbly flows with non-uniform bubble sizes. Among the (A - - l)-fluids, one fluid corresponds to the liquid phase and the A fluids to gas bubbles. To demonstrate the potential of the proposed method, unsteady bubble plumes in a water filled vessel were simulated using both... 

Zun I (1987) Transition from wall void peaking to core void peaking in turbulent bubbly flow. Invited lecture, ICHMT international seminar on transient phenomena in multiphase flow, Dubrovnik, Yugoslavia, 24-29 May In Afgan NH (ed) Proceedings of transient phenomena in multiphase flow. Hemisphere Publ Corp, pp 225-245, 1988... 

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