Zobrazeno 1 - 10
of 194
pro vyhledávání: '"Proctor, M. R. E."'
Publikováno v:
Proc. R. Soc. A (2020) 476: 20200494
We study the instability of a B\'enard layer subject to a vertical uniform magnetic field, in which the fluid obeys the Maxwell-Cattaneo (MC) heat flux-temperature relation. We extend the work of Bissell (Proc. R. Soc. A, 472: 20160649, 2016) to non-
Externí odkaz:
http://arxiv.org/abs/2010.07170
In this paper we present numerical simulations of rapidly-rotating Rayleigh-B\'enard convection in the Boussinesq approximation with stress-free boundary conditions. At moderately low Rossby number and large Rayleigh number, we show that a large-scal
Externí odkaz:
http://arxiv.org/abs/1408.6483
Autor:
Favier, B., Proctor, M. R. E.
Publikováno v:
Phys. Rev. E, 2013
We consider kinematic dynamo action in rapidly rotating Boussinesq convection just above onset. The velocity is constrained to have either a square or a hexagonal pattern. For the square pattern, large-scale dynamo action is observed at onset, with m
Externí odkaz:
http://arxiv.org/abs/1310.6255
Autor:
Favier, B., Proctor, M. R. E.
Publikováno v:
Phys. Rev. E 88, 031001(R), 2013
We consider the classical problem of kinematic dynamo action in simple steady flows. Due to the adjointness of the induction operator, we show that the growth rate of the dynamo will be exactly the same for two types of magnetic boundary conditions:
Externí odkaz:
http://arxiv.org/abs/1308.5966
Autor:
Hughes, D. W., Proctor, M. R. E.
Publikováno v:
2013 Vol 717, 395-416
Recent numerical simulations of dynamo action resulting from rotating convection have revealed some serious problems in applying the standard picture of mean field electrodynamics at high values of the magnetic Reynolds number, and have thereby under
Externí odkaz:
http://arxiv.org/abs/1211.5339
We here report calculations of magnetic buoyancy instabilities of a sheared magnetic layer where two separate zones are unstable. The idea is to study the possible generation of large-scale helical structures which could then rise through a stellar c
Externí odkaz:
http://arxiv.org/abs/1210.7999
Publikováno v:
Mon. Not. R. Astron. Soc. 426, pp.3349-3359 (2012)
We consider the three-dimensional instability of a layer of horizontal magnetic field in a polytropic atmosphere where, contrary to previous studies, the field lines in the initial state are not unidirectional. We show that if the twist is initially
Externí odkaz:
http://arxiv.org/abs/1208.4787
Numerical simulations are an important tool in furthering our understanding of turbulent dynamo action, a process that occurs in a vast range of astrophysical bodies. It is important in all computational work that comparisons are made between differe
Externí odkaz:
http://arxiv.org/abs/1103.0754
Autor:
Richardson, K. J., Proctor, M. R. E.
We investigate the interaction of a fluctuating alpha-effect with large-scale shear in a simple nonlinear 1-dimensional dynamo wave model. We firstly extend the calculations of Proctor (2007, MNRAS, 41, L39-L42) to include spatial variation of the fl
Externí odkaz:
http://arxiv.org/abs/1011.2406
The Sun is a magnetic star whose cyclic activity is thought to be linked to internal dynamo mechanisms. A combination of numerical modelling with various levels of complexity is an efficient and accurate tool to investigate such intricate dynamical p
Externí odkaz:
http://arxiv.org/abs/1005.2283