NDLI: New type of the interface evolution in the richtmyer-meshkov instability

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New type of the interface evolution in the richtmyer-meshkov instability

Content Provider	NASA Technical Reports Server (NTRS)
Author	Abarzhi, S. I. Herrmann, M.
Copyright Year	2003
Description	We performed systematic theoretical and numerical studies of the nonlinear large-scale coherent dynamics in the Richtmyer-Meshkov instability for fluids with contrast densities. Our simulations modeled the interface dynamics for compressible and viscous uids. For a two-fluid system we observed that in the nonlinear regime of the instability the bubble velocity decays and its surface attens, and the attening is accompanied by slight oscillations. We found the theoretical solution for the system of conservation laws, describing the principal influence of the density ratio on the motion of the nonlinear bubble. The solution has no adjustable parameters, and shows that the attening of the bubble front is a distinct property universal for all values of the density ratio. This property follows from the fact that the RM bubbles decelerate. The theoretical and numerical results validate each other, describe the new type of the bubble front evolution in RMI, and identify the bubble curvature as important and sensitive diagnostic parameter.
File Size	410013
Page Count	11
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040027954
Archival Resource Key	ark:/13960/t59d1wp1p
Language	English
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Conservation Laws Navier-stokes Equation Viscosity Shock Waves Bubbles Numerical Analysis Stability Fluid Flow Nonlinearity Liquid-liquid Interfaces Two Dimensional Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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