Spectrum evolution of primordial cosmic turbulence

Details Spectrum evolution of primordial cosmic turbulence Spectrum evolution of primordial cosmic turbulence

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..113f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, July 1980, p. 113-126.

Physics

Plasma Physics

1

Astronomical Models, Cosmology, Plasma Physics, Recombination Reactions, Spectrum Analysis, Turbulence Effects, Electron-Ion Recombination, Galactic Evolution, Mathematical Models, Navier-Stokes Equation, Stochastic Processes

Scientific paper

The evolution of primordial cosmic turbulence prior to the epoch of plasma recombination is investigated numerically using the Wiener-Hermite expansion technique which gives reasonable results for laboratory turbulence. It is found that the Kolmogorov spectrum is established only within a narrow range of wavenumber space for reasonable parameter sets, because the expansion of the universe has a tendency to suppress an energy cascade from larger eddies to smaller ones. The present result does not agree with that obtained by Kurskov and Ozernoi, who computed the decay of turbulence in a fictitious nonexpanding frame using the Heisenberg closure hypothesis, while in the present study it was done in a physical frame.

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