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Reynolds stresses – dependence on latitude
Author(s) -
Hupfer C.,
Käpylä P.,
Stix M.
Publication year - 2005
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200410380
Subject(s) - differential rotation , equator , physics , reynolds stress , angular momentum , latitude , rotation (mathematics) , reynolds number , angular velocity , mechanics , flow (mathematics) , convection , classical mechanics , astrophysics , geometry , turbulence , stars , mathematics , astronomy
We present some results of three‐dimensional hydrodynamic simulations of a compressible flow under the influence of rotation. The code implements a three‐layer (stably–unstably–stably stratified) rectangular box placed at various latitudes in a convection zone of a star. We focus on the Reynolds stresses Q ij = 〈 u ′ i u ′ j 〉 which in mean‐field models have a crucial influence on angular momentum transport and differential rotation. Especially we examine the occurrence of a strong peak of Q θϕ at low latitude very close to the equator, which may have implications to the theory of the angular velocity profile observed on the Sun. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)