TY - JOUR
T1 - Flux correlations in supersonic isothermal turbulence
AU - Wagner, R.
AU - Falkovich, Gregory
AU - Kritsuk, A. G.
AU - Norman, M. L.
N1 - CyberInfrastructure Research, Education and Development at the San Diego Supercomputer Center (SDSC); NSF [AST-0908740, AST-1109570]; Chinese Academy of Sciences [KJCX2.W.W10]R.W. is supported in part by CyberInfrastructure Research, Education and Development at the San Diego Supercomputer Center (SDSC); A.G.K. is supported in part by NSF grants AST-0908740 and AST-1109570. The simulation utilized TeraGrid computer time allocations MCA98N020 and MCA07S014 at SDSC. The analysis was performed on the Extreme Science and Engineering Discovery Environment (XSEDE) resource Trestles at SDSC under a Director's Discretionary Allocation. A.G.K. and G.F. were supported in part by the Project of Knowledge Innovation Program (PKIP) of Chinese Academy of Sciences, Grant No. KJCX2.W.W10.
PY - 2012/12/25
Y1 - 2012/12/25
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84870798508&partnerID=8YFLogxK
U2 - https://doi.org/10.1017/jfm.2012.470
DO - https://doi.org/10.1017/jfm.2012.470
M3 - مقالة
SN - 0022-1120
VL - 713
SP - 482
EP - 490
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
ER -