Appearance of Three Dimensionality in Wall-Bounded MHD Flows
نویسندگان
چکیده
منابع مشابه
Appearance of three dimensionality in wall-bounded MHD flows.
We characterize experimentally how three dimensionality appears in wall-bounded magnetohydrodynamic flows. Our analysis of the breakdown of a square array of vortices in a cubic container singles out two mechanisms: first, a form of three dimensionality we call weak appears through differential rotation in individual 2D vortices. Second, strong three dimensionality characterized by vortex disru...
متن کاملSpectral Methods Based on the Least Dissipative Modes for Wall Bounded MHD Flows
We present a new approach for the Spectral Direct Numerical Simulation (DNS) of LowRm wall bounded magnetohydrodynamic (MHD) flows. The novelty is that instead of using bases like the usual Tchebychev polynomials, that are easy to implement but incur heavy computational costs in order to resolve the Hartmann boundary layers that arise along the walls, we use a basis made of elements that alread...
متن کاملGeometry of turbulence in wall-bounded shear flows: periodic orbits
The dynamical theory of moderate Reynolds number turbulence triangulates the infinite-dimensional Navier-Stokes state space by sets of exact solutions (equilibria, relative equilibria, periodic orbits, ...) which form a rigid backbone which enables us to describe and predict the sinuous motions of a turbulent fluid. We report determination of a set of unstable periodic orbits from close recurre...
متن کاملVelocity limit in DPD simulations of wall-bounded flows
Dissipative particle dynamics (DPD) is a relatively new mesoscopic simulation approach, which has been successfully applied in modeling complex fluids in periodic domains. A recent modification [1] has allowed DPD simulations of polymers for realistic values of the Schmidt number. However, DPD and its extensions encounter difficulties in simulating even simple fluids in wall-bounded domains. Th...
متن کاملOnset of three-dimensionality in electromagnetically driven thin-layer flows
Two-dimensional fluid flow is often approximated in the laboratory with thin electromagnetically forced fluid layers. The faithfulness of such an experimental model must be considered carefully, however, because the physical world is inherently three-dimensional. By adapting an analysis technique developed for oceanographic data, we divide velocity measurements from a thin-layer flow into two c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2010
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.104.034502