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Scaling of locally averaged energy dissipation and enstrophy density in isotropic turbulence
Kartik P Iyer, Jörg Schumacher, Katepalli R Sreenivasan +1
Using direct numerical simulations of isotropic turbulence in periodic cubes of several sizes, the largest being yielding a microscale Reynolds number of , we study…
Cancellation exponents in isotropic turbulence and magnetohydrodynamic turbulence
X. M. Zhai, K. R. Sreenivasan, P. K. Yeung
Small scale characteristics of turbulence such as velocity gradients and vorticity fluctuate rapidly in magnitude and oscillate in sign. Much work exists on the characterization of…
Butterfly diagram of a Sun-like star observed using asteroseismology
M. Bazot, M. B. Nielsen, D. Mary +6
Stellar magnetic fields are poorly understood but are known to be important for stellar evolution and exoplanet habitability. They drive stellar activity, which is the main observa…
Transition to turbulence scaling in Rayleigh-Bénard convection
Jörg Schumacher, Ambrish Pandey, Victor Yakhot +1
If a fluid flow is driven by a weak Gaussian random force, the nonlinearity in the Navier-Stokes equations is negligibly small and the resulting velocity field obeys Gaussian stati…
Steep cliffs and saturated exponents in three dimensional scalar turbulence
Kartik P. Iyer, Jörg Schumacher, Katepalli R Sreenivasan +1
The intermittency of a passive scalar advected by three-dimensional Navier-Stokes turbulence at a Taylor-scale Reynolds number of is studied using direct numerical simulation…
Asymmetry of line profiles of stellar oscillations measured by Kepler for ensembles of solar-like oscillators: impact on mode frequencies and dependence on effective temperature
O. Benomar, Mjo. Goupil, K. Belkacem +7
Oscillation properties are usually measured by fitting symmetric Lorentzian profiles to the power spectra of Sun-like stars. However the line profiles of solar oscillations have be…