Theoretical & Experimental Investigation of Coherent Structure in the Turbulent Boundary Layer.
Abstract
This project combines both experimental video flow visualization studies and theoretical investigations of a series of phenomenological and theoretical models based upon the three-dimensional details of convected, coherent structural elements of a turbulent flow as it interacts with a solid surface. The experimental program has considered a range of sub-problems including high Reynolds Number (4 million) turbulent flows, the effect of surface modification on low-speed streak formation, and the effect of vortex loop interaction with a solid boundary. To augment the visualization pictures, a computerized video-digitizing system has been implemented. Results show promise for obtaining quantitative data from low visualization pictures. The specific thrust of the theoretical studies has been focussed on three areas: how two- and three-dimensional vortex structures interact with wall boundary layers, the development of a new type of prediction method for two-dimensional turbulent boundary-layer flows, and improvement in numerical techniques for solving parabolic, boundary-layer equations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1981
- Accession Number
- ADA102368
Entities
People
- C. R. Smith
- D. E. Abbott
- J. D. A. Walker
Organizations
- Lehigh University