A new approach for the study of the overlap layer of wallturbulence is proposed. The multi-dimensional description of turbulence given by the Kolmogorov equation generalized to wall-flows is used and shown relevant for the identification of very robust features of the overlap layer. Numerical data of a turbulent channel are used. Despite the low Reynolds, a well-defined outer energy source region appears. The possibility to analyze its effects on the energy tranfer among scales and wall-distances is shown important to clarify the influences of the external region on the inner layer.
Study of the outer self-regeneration of turbulence in wall flows / Cimarelli, A., De Angelis, E., Talamelli, A., Casciola, C.M. (SPRINGER PROCEEDINGS IN PHYSICS). - In: Springer Proceedings in PhysicsGEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND : Springer Science and Business Media, LLC, 2014. - ISBN 978-3-319-01859-1. - pp. 85-89 [10.1007/978-3-319-01860-7_14]
Study of the outer self-regeneration of turbulence in wall flows
Cimarelli A.
;Talamelli A.;
2014
Abstract
A new approach for the study of the overlap layer of wallturbulence is proposed. The multi-dimensional description of turbulence given by the Kolmogorov equation generalized to wall-flows is used and shown relevant for the identification of very robust features of the overlap layer. Numerical data of a turbulent channel are used. Despite the low Reynolds, a well-defined outer energy source region appears. The possibility to analyze its effects on the energy tranfer among scales and wall-distances is shown important to clarify the influences of the external region on the inner layer.
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