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The coherent structure of the energy cascade in isotropic turbulence.
Sci Rep
January 2025
Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
The energy cascade, i.e. the transfer of kinetic energy from large-scale to small-scale flow motions, has been the cornerstone of turbulence theories and models since the 1940s.
View Article and Find Full Text PDFInteraction of a planar reacting shock wave with an isotropic turbulent vorticity field.
Phys Rev E
November 2017
College of Energy Engineering, Zhejiang University, 310027 Hangzhou, People's Republic of China.
Linear interaction analysis (LIA) is employed to investigate the interaction of reactive and nonreactive shock waves with isotropic vortical turbulence. The analysis is carried out, through Laplace-transform technique, accounting for long-time effects of vortical disturbances on the burnt-gas flow in the fast-reaction limit, where the reaction-region thickness is significantly small in comparison with the most representative turbulent length scales. Results provided by the opposite slow-reaction limit are also recollected.
View Article and Find Full Text PDFPhysics of reshock and mixing in single-mode Richtmyer-Meshkov instability.
Phys Rev E Stat Nonlin Soft Matter Phys
August 2007
University of California, Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
The ninth-order weighted essentially nonoscillatory (WENO) shock-capturing method is used to investigate the physics of reshock and mixing in two-dimensional single-mode Richtmyer-Meshkov instability to late times. The initial conditions and computational domain were adapted from the Mach 1.21 air (acetone)/ SF6 shock tube experiment of Collins and Jacobs [J.
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