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Data-driven derivation of the turbulent energy cascade generator
J. Cleve, T. Dziekan, J. Schmiegel +4
Within the framework of random multiplicative energy cascade models of fully developed turbulence, expressions for two-point correlators and cumulants are derived, taking into acco…
Multiscale self-organized criticality and powerful X-ray flares
A. Bershadskii, K. R. Sreenivasan
A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prot…
Extended self-similarity of the small-scale cosmic microwave background anisotropy
A. Bershadskii, K. R. Sreenivasan
The Extended Self-Similarity (ESS) of cosmic microwave background (CMB) radiation has been studied using recent data obtained by the space-craft based Wilkinson Microwave Anisotrop…
Geometric features of the mixing of passive scalars at high Schmidt numbers
Joerg Schumacher, Katepalli R. Sreenivasan
The mixing of passive scalars of decreasing diffusivity, advected in each case by the same three-dimensional Navier-Stokes turbulence, is studied. The mixing becomes more isotropic…
Schmidt number dependence of derivative moments for quasistatic straining motion
J. Schumacher, K. R. Sreenivasan, P. K. Yeung
Bounds on high-order derivative moments of a passive scalar are obtained for large values of the Schmidt number, . The procedure is based on the approach pioneered by Batchelor…
On the effects of surrogacy of energy dissipation in determining the intermittency exponent in fully developed turbulence
J. Cleve, M. Greiner, K. R. Sreenivasan
The two-point correlation function of the energy dissipation, obtained from a one-point time record of an atmospheric boundary layer, reveals a rigorous power-law scaling with inte…