THE INFLUENCE OF FINITE OBSERVATION INTERVALS ON THE MEASUREMENT OF TURBULENT DIFFUSION PARAMETERS

Abstract

The correlation functions obtained from truncated samples are expressed in terms of the sampling length and the correlation functions of the basic stationary random variables. The application of the results to diffusion phenomena in a turbulent flow is discussed. The investigation brings out the influence of confining oneself to finite observation intervals on the average rate of dispersion of particles from a point source. It is also shown that the turbulent level is of importance in determining the relationship between the Eulerian and Lagrangian time intervals of observation.