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Fourth International Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2005, Marriot Hotel, Williamsburg, Virginia, USA

DOI: 10.1615/TSFP4

REYNOLDS NUMBER DEPENDENCE OF MATERIAL LINE AND SURFACE STRETCHING IN TURBULENCE

pages 95-98
DOI: 10.1615/TSFP4.160
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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.

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