Abstract
Measurements are presented of the advection, production, diffusion and dissipation terms of the mean square temperature fluctuation budget for a two-dimensional jet. Diffusion is more important than advection near the jet centreline. The measured dissipation or destruction, determined using all three components, enables satisfactory closure of the budget in the region of the jet that is free of flow reversal. The difference between the measured dissipation and an estimate, based on local isotropy, is significant across the jet.
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