Devenish, Ben J.; Thomson, D. J. Non-Gaussianity in turbulent relative dispersion. (English) Zbl 1415.76256 J. Fluid Mech. 867, 877-905 (2019). Summary: We present an extension of the author’s [ibid. 210, 113–153 (1990; Zbl 0686.76035)] two-particle Lagrangian stochastic model that is constructed to be consistent with the \(4/5\) law of turbulence. The rate of separation in the new model is reduced relative to the original model with zero skewness in the Eulerian longitudinal relative velocity distribution and is close to recent measurements from direct numerical simulations of homogeneous isotropic turbulence. The rate of separation in the equivalent backwards dispersion model is approximately a factor of 2.9 larger than the forwards dispersion model, a result that is consistent with previous work. Cited in 1 Document MSC: 76F05 Isotropic turbulence; homogeneous turbulence 76F65 Direct numerical and large eddy simulation of turbulence Keywords:isotropic turbulence; turbulence modelling; turbulence theory Citations:Zbl 0686.76035 PDFBibTeX XMLCite \textit{B. J. Devenish} and \textit{D. J. Thomson}, J. Fluid Mech. 867, 877--905 (2019; Zbl 1415.76256) Full Text: DOI References: [1] Baerentsen, J. H. & Berkowicz, R.1984Monte Carlo simulation of plume dispersion in the convective boundary layer. Atmos. Environ.18, 701-712. [2] Berg, J., Lüthi, B., Mann, J. & Ott, S.2006Backwards and forwards relative dispersion in turbulent flow: an experimental investigation. Phys. Rev. E74, 016304. [3] Borgas, M. S. & Sawford, B. L.1994A family of stochastic models for two-particle dispersion in isotropic homogeneous stationary turbulence. J. Fluid Mech.279, 69-99. · Zbl 0825.76271 [4] Borgas, M. S. & Yeung, P. K.2004Relative dispersion in isotropic turbulence. Part 2. 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