- Title
- Scale-by-scale assessment of the effects of mean shear on the energy budget in decaying turbulence
- Creator
- Kamruzzaman, Md; Djenidi, Lyazid; Antonia, Robert A.
- Relation
- 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019. Proceedings of 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 (Southampton, UK 30 July - 02 August, 2019)
- Publisher
- Technical University of Darmstadt
- Resource Type
- conference paper
- Date
- 2019
- Description
- The decay of turbulence in a shear layer generated by two side-by-side grids with different mesh sizes and different solidities is investigated using hot wire anemometry. The single-point energy budget is measured across the grid wake and the two-point energy budget is measured on the wake centreline. It is found that the single point energy bud- get is dominated by the production dissipation and turbulent diffusion in the central region of the flow. it is also observed that the pressure-velocity correlation term becomes important at the edges of the wake. Measurements of the terms of the scale-by-scale energy budget (see Eq. (3) below) showed that while, as expected, the large-scale motion is the sole contributor of energy at large scales, it also contributes to scales of the order of the Taylor microscale. While the actual physical mechanism of this is yet to be determine, this result demonstrates the impact the mean shear can have on the small-scale motion.
- Subject
- budget; turbulence; decaying; large scale motion
- Identifier
- http://hdl.handle.net/1959.13/1460183
- Identifier
- uon:45888
- Language
- eng
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