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On shear-induced turbulence in rotating stars

Abstract : We review various prescriptions which have been proposed for the turbulent transport of matter and angular momentum in differentially rotating stellar radiation zones. A new prescription is presented for the horizontal transport associated with the anisotropic shear turbulence which is produced by the differential rotation in latitude; this ``beta-viscosity'' is drawn from torque measurements in the classical Couette-Taylor experiment (Richard & Zahn \cite{Richard99}, A&A, 347, 734). Its implementation in a stellar evolution code leads to enhanced mixing, as illustrated by models of a rotating main-sequence star of 1.5 solar mass.
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https://hal.archives-ouvertes.fr/hal-03742211
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Stéphane Mathis, A. Palacios, Jean-Paul Zahn. On shear-induced turbulence in rotating stars. Astronomy and Astrophysics - A&A, EDP Sciences, 2004, 425, pp.243-247. ⟨10.1051/0004-6361:20040279⟩. ⟨hal-03742211⟩

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