Measured Similarity Properties of Eddy Viscosity and Mixing Length in Three-Dimensional Turbulent Stern Flows
Abstract
A comprehensive set of experimental turbulence data is presented for the stern region of simple three-dimensional models having 1:1, 2:1, and 3:1 elliptic transverse cross sections. Direct measurements of Reynolds stresses, turbulence kinetic energy, and mean velocity profiles are made by X hot-film anemometry. The values of eddy viscosity and mixing length are obtained from the measured Reynolds stresses and the mean velocity gradient. The experimentally- determined distributions of eddy viscosity and mixing length in the thick stern boundary layers are found to be smaller than values which have been proposed for thin boundary layers. Because eddy viscosity and mixing length models play an important role in stern boundary-layer calculations, a revised empirical mixing length model, which is assumed to be proportional to the square-root of the effective turbulence area, is proposed.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1985
- Accession Number
- ADA156644
Entities
People
- T. T. Huang