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Lagrangian simulation of dispersion in turbulent shear flow with a hybrid computer
Author(s) -
Lee Naugab,
Dukler A. E.
Publication year - 1976
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690220306
Subject(s) - turbulence , shear flow , turbulent diffusion , mechanics , shear (geology) , dispersion (optics) , langevin equation , white noise , diffusion , statistical physics , physics , classical mechanics , mathematics , geology , thermodynamics , optics , statistics , petrology
Two‐dimensional turbulent diffusion is modeled with a generalized Langevin equation. Instantaneous velocities are simulated by using white noise filtered to simulate turbulence. By generating fluctuating signals that are partially correlated, it is possible to model diffusion for a turbulent shear field. The result show that the dispersion is independent of shear for long and short diffusion times but depend strongly on shear for intermediate times.