Accession Number : ADP014808


Title :   The Effect of the Density Ratio on the Nonlinear Dynamics of the Unstable Fluid Interface


Descriptive Note : Progress rept.


Corporate Author : CENTER FOR TURBULENCE RESEARCH STANFORDCA


Personal Author(s) : Abarzhi, S I


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/p014808.pdf


Report Date : Dec 2003


Pagination or Media Count : 10


Abstract : When a light fluid accelerates a heavy fluid, the misalignment of the pressure and density gradients gives rise to the instability of the interface, and produces eventually the turbulent mixing of the fluids (Rayleigh 1892; Davies & Taylor 1950; Richtmyer 1960; Meshkov 1969). This phenomenon is called the Rayleigh-Taylor instability (RTI) if the acceleration is sustained, and the Richtmyer-Meshkov instability (RMI) if the acceleration is driven by a shock or if it is impulsive. The RT/RM turbulent mixing is of extreme importance in astrophysics, inertial confinement fusion, and many other applications (Sharp 1984). To obtain a reliable description of the mixing process, the evolution of a largescale coherent structure, the dynamics of small-scale structures, and the cascades of energy should be understood.


Descriptors :   *TURBULENT FLOW , *RAYLEIGH TAYLOR INSTABILITY , RATIOS , ACCELERATION , COHERENCE , RELIABILITY , NONLINEAR SYSTEMS , MIXING , MISALIGNMENT , GRADIENTS , ASTROPHYSICS , CASCADE STRUCTURES


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE