Speaker
Dr
Tom Goffrey
(University of Exeter)
Description
Stellar evolution is influenced by a wide range of complex, multi-dimensional phenomena. The MUlti-dimensional Stellar Implicit Code, MUSIC, is a new code developed in Exeter with international collaborators that is designed to study such processes. MUSIC is a fully compressible, time-implicit code, which utilises realistic opacity and equation of state data, and is capable of simulating a wide range of Mach number flows simultaneously. We present recent results using MUSIC to study a young solar type star. In the first study the non-local aspect of stellar convection, and its influence on key quantities such as the convective velocity and overshooting layer width is discussed. In the second study, we present the first calculations describing multi-dimensional structure of accreting young stars. We discuss how MUSIC simulations of accretion can be used to refine an implementation of accretion processes within one-dimensional stellar evolutionary models. Ultimately insight from multi-dimensional simulations will be used to build and improve models of stellar evolution. Finally we discuss ongoing studies of shear driven mixing, rotation, and chemical mixing across convective boundaries using MUSIC.
Primary author
Dr
Tom Goffrey
(University of Exeter)
Co-authors
Prof.
Isabelle Baraffe
(University of Exeter)
Dr
Jane Pratt
(University of Exeter)
Dr
Thomas Constantino
(University of Exeter)
