Frequency power spectra of global quantities in magnetoconvection

Abstract

We present the results of direct numerical simulations of power spectral densities for kinetic energy, convective entropy and heat flux for unsteady Rayleigh-Bénard magnetoconvection in the frequency space. For larger values of frequency, the power spectral densities for all the global quantities vary with frequency $f$ as $f^{-2}$. The scaling exponent is independent of Rayleigh number, Chandrasekhar's number and thermal Prandtl number.

5 pages, 3 figures

References in corpus (3)

• Rayleigh-Bénard convection with uniform vertical magnetic field
• Global fluctuations in magnetohydrodynamic dynamos
• Frequency spectra of turbulent thermal convection with uniform rotation