Transitional Intermittency Exponents Through Deterministic Boundary-Layer Structures and Empirical Entropic Indices
نویسندگان
چکیده
منابع مشابه
Transitional Intermittency Exponents Through Deterministic Boundary-Layer Structures and Empirical Entropic Indices
A computational procedure is developed to determine initial instabilities within a three-dimensional laminar boundary layer and to follow these instabilities in the streamwise direction through to the resulting intermittency exponents within a fully developed turbulent flow. The fluctuating velocity wave vector component equations are arranged into a Lorenz-type system of equations. The nonline...
متن کاملEntropy Generation through Deterministic Spiral Structures in a Corner Boundary-Layer Flow
It is shown that nonlinear interactions between boundary layers on adjacent corner surfaces produce deterministic stream wise spiral structures. The synchronization properties of nonlinear spectral velocity equations of Lorenz form yield clearly defined deterministic spiral structures at several downstream stations. The computational procedure includes Burg’s method to obtain power spectral den...
متن کاملEntropy Generation through a Deterministic Boundary-Layer Structure in Warm Dense Plasma
The computational prediction of nonlinear interactive instabilities in three-dimensional boundary layers is obtained for a warm dense plasma boundary layer environment. The method is applied to the Richtmyer–Meshkov flow over the rippled surface of a laser-driven warm dense plasma experiment. Coupled, nonlinear spectral velocity equations of Lorenz form are solved with the mean boundary-layer v...
متن کاملWavelet Analysis to Detect Multi-scale Coherent Eddy Structures and Intermittency in Turbulent Boundary Layer
In the early stage of turbulence study, turbulent flow was deemed fully random and disorder motions of fluid particles. Thus physical quantity describing turbulence was considered as the composition of random fluctuations in spatial and temporal field. Reynoldsう1895えdivided the turbulent field into mean field and fluctuating field and then theories and methods based on statistics for turbulence...
متن کاملElectromagnetic Control of a Transitional Boundary Layer
We investigate numerically the transition to turbulence in a flat-plate boundary layer controlled by electromagnetic forces. The fluid considered is incompressible, Newtonian and low electrically conductive. Similar to boundary layer suction, when applying a steady, wall-parallel, and streamwise oriented Lorentz force, the Blasius velocity profile is transformed to an exponential one. Since the...
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: Entropy
سال: 2014
ISSN: 1099-4300
DOI: 10.3390/e16052729