Fourth International Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP4
REYNOLDS NUMBER DEPENDENCE OF MATERIAL LINE AND SURFACE STRETCHING IN TURBULENCE
pages 95-98
DOI: 10.1615/TSFP4.160
要約
It is numerically shown that the stretching rate, normalised by the reciprocal of Kolmogorov time, of long material lines (or wide surfaces) in stationary homogeneous turbulence depends on the Reynolds number. This is contradicting the conventional belief that the material object stretching is solely determined by the smallest-scale eddies. A physical explanation based on the intensive folding of the material objects is suggested to understand the observed Reynolds number dependence of material object stretching.