THE PHENOMENOLOGY OF SMALL-SCALE TURBULENCE

Small-scare turbulence has been an area of especially active research in the recent past, and several useful research directions have been p ursued. Here, we selectively review this work. The emphasis is on scal ing phenomenology and kinematics of small-scale structure. After provi ding a brief introduction to the classical notions of universality due to Kolmogorov and others, we survey the existing work on intermittenc y, refined similarity hypotheses, anomalous scaling exponents, derivat ive statistics, intermittency models, and the structure and kinematics of small-scale structure-the latter aspect coming largely from the di rect numerical simulation of homogeneous turbulence in a periodic box.