On the Displacements Generated by a Pressure-Point Advected Across the Surface of a Viscoelastic Material.
Abstract
The possibility of reducing ther drag of an underwater vehicle by the use of a compliant coating has given rule to several theoretical and experimental efforts. In a recent experiment in whicxh water flowed over the surface of a visoelastic material, the most prominent surface deformations that were observed were streamwise streaks, or ruts, aligned with the flow. This report treats an idealized problem which is designed to help in understanding the possible source of th ese streaks. The results of this work indicate that the streak pattern most likely consists of the footprints of turbulent bursts in the boundary layer as the bursts are advected across the surface of the material. It was found that the surface waves generated by these bursts are quite negligible. Keywords include: Turbulent flow, compliant coating drag reduction program, Polyvinyl chloride gel, Displacement, and coupling.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1983
- Accession Number
- ADA153858
Entities
People
- T. Kubota
- V. D. Panico