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.
Cimarelli, A., De Angelis, E., Talamelli, A., Casciola, C. (2014). Study of the outer self-regeneration of turbulence in wall flows. Springer Science and Business Media, LLC [10.1007/978-3-319-01860-7_14].
Study of the outer self-regeneration of turbulence in wall flows
CIMARELLI, ANDREA;DE ANGELIS, ELISABETTA;TALAMELLI, ALESSANDRO;
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
