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Critical-Layers.pdf
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🔗 Source: cfd.me.berkeley.edu
📊 Size: 923 KB
👤 Author: Marcus Philip S., Jiang Chung-Hsiang, Pei Suyang, Hassanzadeh Pedram
⬇️ Downloads: 58

Summary

Researchers discovered a new hydrodynamic instability in protoplanetary disks, allowing small perturbations to create large-amplitude vortices that fill the disk's "dead zones" and transport angular momentum. The instability, triggered by weak finite-amplitude initial perturbations, is self-sustaining and draws energy from Keplerian shear. It requires strong rotation, shear, and vertical stratification, and was not previously discovered due to limitations in numerical spatial resolution and the use of constant-density fluids or ideal gases with uniform initial density. The instability is caused by "baroclinic critical layers" that create large-amplitude vortex layers, and can be triggered by various initial perturbations, including white noise, waves, or isolated vortices.

Description

Researchers discovered a new hydrodynamic instability in protoplanetary disks, allowing small perturbations to create large-amplitude vortices that fill the...

Technical Information

  • File Format: PDF
  • File Size: 923 KB
  • Pages: 4
  • Language: EN
  • Author: Marcus Philip S., Jiang Chung-Hsiang, Pei Suyang, Hassanzadeh Pedram
  • Total Downloads: 58
  • Last Updated: 1 month ago

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