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The effects of finite lifetime of passive scalars and vorticity on their power spectra

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  • Nam, Keeyeol
  • Antonsen, Thomas M
  • Guzdar, Parvez N
  • Ott, Edward

Abstract

The power law exponent for the wavenumber power spectrum of a passive scalar field with finite lifetime in Lagrangian chaotic flows and the enstrophy spectrum of two-dimensional Navier–Stokes turbulence with drag are investigated. The power law exponents are related to the distribution of finite-time Lyapunov exponents and the finite lifetime (or the drag coefficient).

Suggested Citation

  • Nam, Keeyeol & Antonsen, Thomas M & Guzdar, Parvez N & Ott, Edward, 2000. "The effects of finite lifetime of passive scalars and vorticity on their power spectra," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 288(1), pages 265-279.
    • Handle: RePEc:eee:phsmap:v:288:y:2000:i:1:p:265-279
    DOI: 10.1016/S0378-4371(00)00426-X
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