On the use of the software package SPRINT in the study of atmospheric turbulence in a convective boundary layer

The use of a general purpose software package, SPRINT (Software for PRoblems IN Time) is examined for the numerical solution of a second-order closure turbulence model that involves a system of coupled partial differential equations. The calculated mean profiles of wind and temperature are found to be in good agreement with Day 33 Wangara data. The calculated vertical profiles of turbulence variables including kinetic energy and heat fluxes compare favorably with those estimated from other numerical models and laboratory experiments. This study shows that SPRINT is an easy-to-use package and substantially reduces the manpower effort required to determine an approximate solution of the complicated mathematical model. It also demonstrates that Donaldson's model satisfies the realizability conditions.