Journal of Theoretical
and Applied Mechanics

39, 4, pp. 885-908, Warsaw 2001

Coherent structures and transport of temperature variance and oscillatory heat fluxes in a stimulated round jet

Stanisław Drobniak, Roman Klajny, Piotr Pełka
The paper deals with heat transfer processes taking place in the near flow region of axisymmetric free jet in the presence of coherent motion stimulated by acoustic wave. The parameters selected for qualitative and quantitative analysis were the temperature variance and coherent as well as oscillatory heat fluxes. Temperature variance was treated as a measure of intensity of heat transport while heat fluxes described spatial characteristics of the heat transfer processes. Analysis of transport equations of the above quantities should explain the physics of heat transfer realised in the presence of coherent structures.
Keywords: turbulent jet; coherent structures; temperature variance