Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Marcotte, Florence"'
Nearly fifty years ago, Roberts (1978) postulated that Earth's magnetic field, which is generated by turbulent motions of liquid metal in its outer core, likely results from a subcritical dynamo instability characterised by a dominant balance between
Externí odkaz:
http://arxiv.org/abs/2411.05499
The Tayler-Spruit dynamo mechanism has been proposed two decades ago as a plausible mechanism to transport angular momentum in radiative stellar layers. Direct numerical simulations are still needed to understand its trigger conditions and the satura
Externí odkaz:
http://arxiv.org/abs/2306.11711
Many physical questions in fluid dynamics can be recast in terms of norm constrained optimisation problems; which in-turn, can be further recast as unconstrained problems on spherical manifolds. Due to the nonlinearities of the governing PDEs, and th
Externí odkaz:
http://arxiv.org/abs/2210.17194
Publikováno v:
Science, Vol. 379, Issue 6629 (2023)
The evolution of a star is influenced by its internal rotation dynamics through transport and mixing mechanisms, which are poorly understood. Magnetic fields can play a role in transporting angular momentum and chemical elements, but the origin of ma
Externí odkaz:
http://arxiv.org/abs/2206.13819
Publikováno v:
Phys. Rev. E 104, 015110 (2021)
We address magnetic-field generation by dynamo action in systems with inhomogeneous electrical conductivity and magnetic permeability. More specifically, we first show that the Taylor-Couette kinematic dynamo undergoes a drastic reduction of its stab
Externí odkaz:
http://arxiv.org/abs/2112.11390
We demonstrate that the nonlinear optimisation of a finite-amplitude disturbance over a freely evolving and possibly even turbulent flow, can successfully identify subcritical dynamo branches as well as the structure and amplitude of their critical p
Externí odkaz:
http://arxiv.org/abs/2112.11376
Autor:
Marcotte, Florence, Zaleski, Stéphane
Publikováno v:
Phys. Rev. Fluids, 4, 103604 (2019)
We address numerically the deformation and fragmentation dynamics of a single liquid drop subject to impulsive acceleration by a unidirectional gas stream. The density ratio between the liquid and gaseous phases is varied in the $10-2000$ range and c
Externí odkaz:
http://arxiv.org/abs/1907.10711
Publikováno v:
Phys. Rev. Lett. 122, 014501 (2019)
We investigate both experimentally and numerically the impact of liquid drops on deep pools of aqueous glycerol solutions with variable pool viscosity and air pressure. With this approach we are able to address drop impacts on substrates that continu
Externí odkaz:
http://arxiv.org/abs/1807.09529
Publikováno v:
SIAM Journal on Applied Mathematics 78, 591-608 (2018)
A heat exchanger can be modeled as a closed domain containing an incompressible fluid. The moving fluid has a temperature distribution obeying the advection-diffusion equation, with zero temperature boundary conditions at the walls. Starting from a p
Externí odkaz:
http://arxiv.org/abs/1710.00646
We present a new scenario for magnetic field amplification where an electrically conducting fluid is confined in a differentially rotating, spherical shell with thin aspect-ratio. When the angular momentum sufficiently decreases outwards, an hydrodyn
Externí odkaz:
http://arxiv.org/abs/1606.04078