Coherent structure extraction in turbulent channel flow using boundary adapted wavelets
نویسندگان
چکیده
منابع مشابه
Coherent vorticity extraction in turbulent boundary layers using orthogonal wavelets
High-resolution data obtained by direct numerical simulation of turbulent boundary layers are analysed by means of orthogonal wavelets. The data, originally given on a Chebychev grid, are first interpolated onto an adapted dyadic grid. Then, they are decomposed using a wavelet basis, which accounts for the anisotropy of the flow by using different scales in the wall-normal direction and in the ...
متن کاملOn Coherent Structures of Turbulent Open-channel Flow Above a Rough Bed
Present study examines turbulent structures of a rough bed open-channel flow in the context of deterministic approach. Instantaneous velocity field is measured in different hydraulic conditions using two dimensional Particle Image Velocimetry (PIV) in vertical plane and Stereoscopic PIV in horizontal plane. Different techniques and quantities such as swirl strength, two-point and cross-correlat...
متن کاملExtraction of coherent structures in a rotating turbulent flow experiment.
The discrete wavelet transform (DWT) and discrete wavelet packet transform (DWPT) are used to extract and study the dynamics of coherent structures in a turbulent rotating fluid. Three-dimensional turbulence is generated by strong pumping through tubes at the bottom of a rotating tank (48.4 cm high, 39.4 cm diameter). This flow evolves toward two-dimensional (2D) turbulence with increasing heig...
متن کاملThe structure of turbulent boundary layers in the wall region of plane channel flow
wall region of plane channel flow The structure of turbulent boundary layers in the References ml#ref-list-1 here the box at the top right-hand corner of the article or click Receive free email alerts when new articles cite this article-sign up in The flow of a viscous incompressible fluid in a plane channel is simulated numerically with the use of a computational code for the numerical integra...
متن کاملCoherent structure of zonal flow and onset of turbulent transport
Excitation of the turbulence in the range of drift wave frequency and zonal flow in magnetized plasmas is analyzed. Nonlinear stabilization effect on zonal flow drive is introduced, and the steady state solution is obtained. The condition for the onset of turbulent transport is obtained and partition ratio of fluctuation energy into turbulence and zonal flows is derived. The turbulent transport...
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: Journal of Turbulence
سال: 2017
ISSN: 1468-5248
DOI: 10.1080/14685248.2017.1284326