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- W3212330475 abstract "Abstract A Lagrangian approach is developed to describe particle’s dispersion in a stationary, homogeneous and isotropic turbulent flow. Obviously, the particles’ dispersion is influenced by the fluid velocity fluctuations, which are classically simulated by a Monte Carlo process or Markov chains. However, some studies have shown the restrictions of these methods generating the fluid turbulent velocity and have suggested improvements to ensure that the Lagrangian model accounts for the three main effects governing the dispersion in gas-particle flows, namely the inertia, crossing trajectories and continuity effects. The first aim of this paper is to present an improved Lagrangian model which integrates the spatio-temporal characteristics of the fluid turbulence experienced by the particle. The agreement between the numerical results obtained and the analytical expressions derived by Wang and Stock (1993) will be very satisfying. Another interest is to investigate the role of the traditionally-neglected and troublesome added mass and history terms in numerical studies when long time dispersion of inertial particles is the primary concern. Indeed, we will observe that for a large range of values of the ratio of particle to fluid density, these non-stationary forces have statistically no influence on the characteristics of the turbulent particle dispersion and can be safely omitted." @default.
- W3212330475 created "2021-11-22" @default.
- W3212330475 creator A5064570257 @default.
- W3212330475 date "2000-11-05" @default.
- W3212330475 modified "2023-10-02" @default.
- W3212330475 title "Lagrangian Simulation of Gas-Solid Flows in Homogeneous Isotropic Turbulence" @default.
- W3212330475 doi "https://doi.org/10.1115/imece2000-2049" @default.
- W3212330475 hasPublicationYear "2000" @default.
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