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Characterisation of superfluid vortices in helium II
Gregory P. Bewley, Daniel P. Lathrop, Katepalli R. Sreenivasan
Matter at low temperatures exhibits unusual properties such as superfluidity, superconductivity, Bose-Einstein condensation, and supersolidity. These states display quantum mechani…
Statistics and geometry of passive scalars in turbulence
Joerg Schumacher, Katepalli R. Sreenivasan
We present direct numerical simulations (DNS) of the mixing of the passive scalar at modest Reynolds numbers (10 =< R_λ=< 42) and Schmidt numbers larger than unity (2 =< Sc =< 32).…
Fluctuations of temperature gradients in turbulent thermal convection
K. R. Sreenivasan, A. Bershadskii, J. J. Niemela
Broad theoretical arguments are proposed to show, formally, that the magnitude G of the temperature gradients in turbulent thermal convection at high Rayleigh numbers obeys the sam…
Logarithmically modified scaling of temperature structure functions in thermal convection
A. Bershadskii, K. R. Sreenivasan, J. J. Niemela
Using experimental data on thermal convection, obtained at a Rayleigh number of 1.5 , it is shown that the temperature structure functions , where $ΔT_r…