In this study, turbulent statistics of flow on gravel beds are described by using the laws of turbulence in conjunction with the Double-Averaging Methodology (DAM). For this purpose, an experimental campaign in a laboratory flume was performed. Applying the Taylor frozen-in hypothesis to the Kolmogorov 4/5-law for the spatial increments of the streamwise velocity, it is revealed the existence of the well-known inertial subrange and an accurate Turbulent Kinetic Energy (TKE) dissipation rate ε assessment is obtained. The present work shows the validity of this statistical methodology (Kolmogorov’s 4/5-law) to study the turbulence characteristics at small scales.
Estimation of the energy dissipation rate with the Kolmogorov 4/5-law in turbulent flows on gravel beds
COSCARELLA F.
;PENNA N.;SERVIDIO S.;GAUDIO R.
2022-01-01
Abstract
In this study, turbulent statistics of flow on gravel beds are described by using the laws of turbulence in conjunction with the Double-Averaging Methodology (DAM). For this purpose, an experimental campaign in a laboratory flume was performed. Applying the Taylor frozen-in hypothesis to the Kolmogorov 4/5-law for the spatial increments of the streamwise velocity, it is revealed the existence of the well-known inertial subrange and an accurate Turbulent Kinetic Energy (TKE) dissipation rate ε assessment is obtained. The present work shows the validity of this statistical methodology (Kolmogorov’s 4/5-law) to study the turbulence characteristics at small scales.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
