- Title
- Behaviour of the energy dissipation coefficient in a rough wall turbulent boundary layer
- Creator
- Kamruzzaman, Md.; Djenidi, L.; Antonia, R. A.
- Relation
- Experiments in Fluids Vol. 59, no. 9
- Publisher Link
- http://dx.doi.org/10.1007/s00348-017-2467-y
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2018
- Description
- Hot-wire anemometry measurements are made in a rough wall turbulent boundary layer to assess the dependence of the mean turbulent kinetic energy dissipation coefficient, C∈, on the distance from the wall and the Taylor microscale Reynolds number, Reλ. The locally isotropic expression <∈iso> is used as a surrogate for the mean turbulent kinetic energy dissipation rate, <∈>, for calculating [formula could not be replicated] are the integral length scale and the rms of the longitudinal velocity fluctuation, respectively. The measurements show that C∈ varies significantly near the wall, but becomes almost constant in the region 0.2≤y/δ≤0.6 of the boundary layer, a region where Reλ is also practically constant.
- Subject
- kinetic energy; boundary layer; turbulent kinetic energy dissipation rate; numerical simulations
- Identifier
- http://hdl.handle.net/1959.13/1413313
- Identifier
- uon:36610
- Identifier
- ISSN:0723-4864
- Language
- eng
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