Flux correlations in supersonic isothermal turbulence

R. Wagner, Gregory Falkovich, A. G. Kritsuk, M. L. Norman

Research output: Contribution to journalArticlepeer-review

Abstract

Using data from a large-scale three-dimensional simulation of supersonic isothermal turbulence, we have tested the validity of an exact flux relation derived analytically from the Navier-Stokes equation by Falkovich, Fouxon & Oz (J. Fluid Mech., vol. 644, 2010, p. 465). That relation, for compressible barotropic fluids, was derived assuming turbulence generated by a large-scale force. However, compressible turbulence in simulations is usually initialized and maintained by a large-scale acceleration, as in gravity-driven astrophysical flows. We present a new approximate flux relation for isothermal turbulence driven by a large-scale acceleration, and find it in reasonable agreement with the simulation results.

Original languageEnglish
Pages (from-to)482-490
Number of pages9
JournalJournal of Fluid Mechanics
Volume713
DOIs
StatePublished - 25 Dec 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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