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  Tenacious wall states in thermal convection in rapidly rotating containers

Shishkina, O. (2020). Tenacious wall states in thermal convection in rapidly rotating containers. Journal of Fluid Mechanics, 898: F1. doi:10.1017/jfm.2020.420.

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 Creators:
Shishkina, Olga1, Author           
Affiliations:
1Laboratory for Fluid Physics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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 Abstract: Convection in a container, heated from below, cooled from above and rapidly rotated
around a vertical axis, starts from its sidewall. When the imposed vertical temperature
gradient is not sufficiently large for bulk modes to set in, thermal convection can
start in the form of wall modes, which are observed near the sidewall as pairs of
hot ascending and cold descending plumes that drift along the wall. With increasing
temperature gradient, different wall and bulk modes occur and interact, leading finally
to turbulence. A recent numerical study by Favier & Knobloch (J. Fluid Mech., 895,
2020, R1) reveals an extreme robustness of the wall states. They persist above the
onset of bulk modes and turbulence, thereby relating them to the recently discovered
boundary zonal flows in highly turbulent rotating thermal convection. More exciting
is that the wall modes can be thought of as topologically protected states, as they
are robust with respect to the sidewall shape. They stubbornly drift along the wall,
following its contour, independent of geometric obstacles.

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Language(s): eng - English
 Dates: 2020-06-242020
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1017/jfm.2020.420
 Degree: -

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Title: Journal of Fluid Mechanics
Source Genre: Journal
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Publ. Info: -
Pages: 4 Volume / Issue: 898 Sequence Number: F1 Start / End Page: - Identifier: ISSN: 0022-1120
ISSN: 1469-7645