Planar imaging of turbulent buoyant jet mixing
Abstract
Many mixing problems of practical interest, including reacting flow systems, are marked by large density differences and significant buoyancy effects. Mixing models for reacting flow simulations must be applicable in flow regions with and without density fluctuations. In this work, planar Rayleigh scattering in a turbulent, buoyant helium-air jet yields information on species concentrations and their gradients. Of interest are quantities such as spatial distributions of mean scalar and scalar dissipation rate, the intermittency of the dissipation field, and the relative contribution of different length scales to the dissipation process. The planar nature of the present measurements permits direct assessment of mixing models that appeal to the structural features of turbulent mixing.
- Publication:
-
APS Division of Fluid Dynamics Meeting Abstracts
- Pub Date:
- November 2004
- Bibcode:
- 2004APS..DFD.NJ003S