Statistics of lateral velocity increment in isotropic turbulence

The probability density function of lateral velocity increment across an arbitrary distance ranging from the Kolmogorov scale to the integral scale in isotropoic turbulence is predicted in a semi-empirical way. The method is based on the previous theory of the first author for treating statistics of longitudinal velocity increment and new data of direct numerical simulation of decaying isotropic turbulence on a 512 3 grid.