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12 - Damping

Published online by Cambridge University Press:  15 July 2019

Bernard Roberts
Bernard Roberts
Affiliation:
University of St Andrews, Scotland
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Summary

The effect of damping by magnetic diffusivity and viscosity is examined for an Alfven wave in a non-uniform atmosphere, demonstrating the rapidity of damping when phase mixing operates. A cubic law of damping tends to apply, though this may apply only after a transition stage or time. Damping when phase mixing is absent and when it is operative is illustrated for coronal conditions. The various approximations used in the derivation of such results are examined. Damping by a slow wave under the influence of viscosity and thermal conductivity is explored at length. Results are illustrated for coronal conditions. Both temporal and spatial behaviours are investigated.

Keywords

damping of wavesphase mixing of Alfven wavetemporal damping of slow wavespatial dampingviscositythermal conduction
Type
Chapter
Information
MHD Waves in the Solar Atmosphere , pp. 360 - 396
Publisher: Cambridge University Press
Print publication year: 2019

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  • Damping
  • Bernard Roberts, University of St Andrews, Scotland
  • Book: MHD Waves in the Solar Atmosphere
  • Online publication: 15 July 2019
  • Chapter DOI: https://doi.org/10.1017/9781108613774.013
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  • Damping
  • Bernard Roberts, University of St Andrews, Scotland
  • Book: MHD Waves in the Solar Atmosphere
  • Online publication: 15 July 2019
  • Chapter DOI: https://doi.org/10.1017/9781108613774.013
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.

  • Damping
  • Bernard Roberts, University of St Andrews, Scotland
  • Book: MHD Waves in the Solar Atmosphere
  • Online publication: 15 July 2019
  • Chapter DOI: https://doi.org/10.1017/9781108613774.013
Available formats
×