2003
DOI: 10.1017/s0022112003004877
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On the relevance of the lift force in bubbly turbulence

Abstract: Microbubble-laden homogeneous and isotropic turbulent flow is investigated by using direct numerical simulation of the three-dimensional Navier–Stokes equations and computing the bubble trajectories with Lagrangian tracking. The bubble motion is calculated by taking into account the effect of fluid acceleration plus added mass, drag, gravity, and in particular the lift force, which had been neglected in many previous simulations. By comparing the results from simulations with and without lift, we find the effe… Show more

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Cited by 106 publications
(94 citation statements)
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“…A similar behavior was observed in point-force computations of bubbly homogeneous isotropic turbulence. 18 From Eq. ͑7͒, it is clear that the reduction of ‫ץ‬U / ‫ץ‬yЈ lowers the radial component of the added-mass force, i.e., the strength of the dominant centripetal force.…”
Section: A Evolution Of a Single Vortexmentioning
confidence: 99%
See 1 more Smart Citation
“…A similar behavior was observed in point-force computations of bubbly homogeneous isotropic turbulence. 18 From Eq. ͑7͒, it is clear that the reduction of ‫ץ‬U / ‫ץ‬yЈ lowers the radial component of the added-mass force, i.e., the strength of the dominant centripetal force.…”
Section: A Evolution Of a Single Vortexmentioning
confidence: 99%
“…Even though a Kolmogorov scaling has been clearly identified for the dispersion of small bubbles, bubble-induced modifications in a fully turbulent flow are still under examination. 18 Moreover, compared with the case of heavy solid particles, bubbles represent a much more difficult problem because they are extremely sensitive to hydrodynamic effects, owing to their negligible density. While part of these effects, i.e., added mass, is now quite well known, models for the lift force in a general flow field are still lacking in several flow regimes, especially for microbubbles.…”
Section: Introductionmentioning
confidence: 99%
“…Equation (1) is solved in wavenumber k space, by using the pseudo-spectral method [8]. All flow scales from the integral, where the energy is introduced in the system, down to the Kolmogorov scale η, where it is dissipated by viscous effects, are resolved.…”
Section: Flow Simulationmentioning
confidence: 99%
“…Later, analytical investigations have been carried out for heavy particles that, owing to inertia, do not follow all the turbulence fluctuations [4,5], and, most recently, also for air bubbles [6]- [8].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation