Some aspects of the thermal mixing layer in grid turbulence

Publisher Website
Google Scholar
Abstract
By generating a temperature step in grid turbulence using two new methods (a mandoline and a toaster) the evolution of some first‐, second‐, third‐, and fourth‐order moment quantities of the temperature field in a thermal mixing layer are studied. The results confirm the earlier experimental findings of LaRue and Libby [Phys. Fluids 2 4, 597 (1981)] and LaRue et al. [Phys. Fluids 2 4, 1927 (1981)] who used a half‐heated grid to generate the thermal field. It is also shown that although second‐order quantities such as the heat flux coefficient and the centerline temperature variance appear to have reached their equilibrium values and that all quantities collapse well using the half‐width of the mean temperature profile, the data is not consistent with self‐similarity.