التفاصيل البيبلوغرافية
العنوان:
Dimensionality of Anisotropic Homogeneous Turbulence With Distortions: Compared Effects Between the Coriolis Force and the Lorentz Force
المؤلفون:
Alexandre Delache , Claude Cambon , Fabien S. Godeferd
المصدر:
Volume 1D, Symposia: Transport Phenomena in Mixing; Turbulent Flows; Urban Fluid Mechanics; Fluid Dynamic Behavior of Complex Particles; Analysis of Elementary Processes in Dispersed Multiphase Flows; Multiphase Flow With Heat/Mass Transfer in Process Technology; Fluid Mechanics of Aircraft and Rocket Emissions and Their Environmental Impacts; High Performance CFD Computation; Performance of Multiphase Flow Systems; Wind Energy; Uncertainty Quantification in Flow Measurements and Simulations .
بيانات النشر:
American Society of Mechanical Engineers, 2014.
سنة النشر:
2014
مصطلحات موضوعية:
Physics , Turbulence , Magnetic Reynolds number , Mechanics , Magnetic field , Physics::Fluid Dynamics , symbols.namesake , Classical mechanics , Fictitious force , symbols , Induction equation , Magnetohydrodynamics , Lorentz force , Conservative force
الوصف:
We consider initially isotropic homogeneous turbulence which is submitted to an external force, in statistically axisymmetric configurations. First, we study hydrodynamical turbulence in a rotating frame, in which case the Coriolis force modifies the structure and dynamics of the flow, thus creating elongated structures along the axis of rotation, corresponding to an accumulation of energy in the neighbourhood of the equatorial spectral plane. Secondly, a very similar configuration is that of magnetohydrodynamics (MHD) of a conducting fluid within an externally applied space uniform magnetic field, in which case the Lorentz force also concentrates energy to the same spectral equatorial manifold, but creates axially extending current sheets, along the magnetic field. We more specifically consider the quasi-static limit at small magnetic Reynolds number, in which the induction equation is analytically solved. We study the anisotropy of each turbulent flow using progressively refined statistics applied to results of direct numerical simulations, and we show that an accurate characterization of the flow structure requires advanced two-point statistics, which are available easily only in spectral space.Copyright © 2014 by ASME
DOI:
10.1115/fedsm2014-22022
URL الوصول:
https://explore.openaire.eu/search/publication?articleId=doi_________::363f51571424cd32eceb8e18ba7cdebb https://doi.org/10.1115/fedsm2014-22022
رقم الانضمام:
edsair.doi...........363f51571424cd32eceb8e18ba7cdebb
قاعدة البيانات:
OpenAIRE