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16 - Convergent/divergent geometry

from Part 2 - Hydrodynamics of Complex Flows

Ye Zhou
Affiliation:
Lawrence Livermore National Laboratory, California
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Summary

For analytical simplicity, most research to date on RT and RM instabilities has focused on planar geometries. Such a simplified design is very helpful in easing the diagnostic requirements for laboratory experiments. However, in our limited observations of Chapter 15, we have already witnessed that other geometric configurations may alter the mixing layer growth significantly. In a variety of important applications, one must deal with imploding/exploding flows, the prime examples of which are inertial confinement fusion implosions (convergent geometry) and supernova explosions (divergent geometry). In these configurations, the flows are radially accelerated/decelerated. In contrast to planar geometry, where only RM growth is expected to occur, converging/diverging shock-accelerated interfaces can be RT unstable as they geometrically contract or expand. In the experiments and analytical modeling in this chapter, the amplitude growth depends on the convergence history in a complicated way.

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Chapter
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Hydrodynamic Instabilities and Turbulence
Rayleigh–Taylor, Richtmyer–Meshkov, and Kelvin–Helmholtz Mixing
, pp. 306 - 338
Publisher: Cambridge University Press
Print publication year: 2024

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  • Convergent/divergent geometry
  • Ye Zhou, Lawrence Livermore National Laboratory, California
  • Book: Hydrodynamic Instabilities and Turbulence
  • Online publication: 27 June 2024
  • Chapter DOI: https://doi.org/10.1017/9781108779135.019
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  • Convergent/divergent geometry
  • Ye Zhou, Lawrence Livermore National Laboratory, California
  • Book: Hydrodynamic Instabilities and Turbulence
  • Online publication: 27 June 2024
  • Chapter DOI: https://doi.org/10.1017/9781108779135.019
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Convergent/divergent geometry
  • Ye Zhou, Lawrence Livermore National Laboratory, California
  • Book: Hydrodynamic Instabilities and Turbulence
  • Online publication: 27 June 2024
  • Chapter DOI: https://doi.org/10.1017/9781108779135.019
Available formats
×