Experimental Study on Statistical Properties of Coherent Structures and Intermittency in a Channel Flow

摘要: A great interest has recently been addressed to the study of statistical properties homogenous and isotropic turbulence nowadays most experimental results agree on deviations from Kolmogorov 1941 laws in inertial range. To knowledge authors, extensive studies have not performed for case non homogeneous turbulence. In this paper, stream-wise velocity fluctuation a turbulent air channel flow are studied experimentally at various distances wall. Strong shear layer events, educed using classical VITA method (Variable Interval Time Average, [1]) LIM (Local Intermittency Measure, [2]), considered related theory values obtained by ESS (Extended Self Similarity, [3])