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4 - Roughness

Published online by Cambridge University Press:  14 December 2018

Jinjun Wang  and
Lihao Feng
Jinjun Wang
Affiliation:
Beijing University of Aeronautics and Astronautics
Lihao Feng
Affiliation:
Beijing University of Aeronautics and Astronautics
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Summary

Roughness is generally used for boundary layer flow control. Some traditional knowledge from the literature is first presented and then recent progress on roughness control is explained. Traditionally, roughness was used as an approach to advance flow transition, however some recent work has found an interesting result that roughness could delay flow transition and thus reduce the friction drag. Roughness also influences the roadmap of bypass transition and the coherent structures in the turbulent boundary layer. Since roughness can be made to form very simple configurations and can be easily attached to the object surface, such findings suggest significant potential applications of roughness in engineering.
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Information
Flow Control Techniques and Applications , pp. 65 - 93
Publisher: Cambridge University Press
Print publication year: 2018

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  • Roughness
  • Jinjun Wang, Lihao Feng
  • Book: Flow Control Techniques and Applications
  • Online publication: 14 December 2018
  • Chapter DOI: https://doi.org/10.1017/9781316676448.005
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Save book to Dropbox

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 Dropbox.

  • Roughness
  • Jinjun Wang, Lihao Feng
  • Book: Flow Control Techniques and Applications
  • Online publication: 14 December 2018
  • Chapter DOI: https://doi.org/10.1017/9781316676448.005
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.

  • Roughness
  • Jinjun Wang, Lihao Feng
  • Book: Flow Control Techniques and Applications
  • Online publication: 14 December 2018
  • Chapter DOI: https://doi.org/10.1017/9781316676448.005
Available formats
×