Accession Number : AD0749709

Title :   Time Dependent Shear Stress Beneath a Shoaling Wave.

Descriptive Note : Research rept.,

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s) : Fisher,John

Report Date : 19 MAY 1972

Pagination or Media Count : 102

Abstract : The celerity of a shoaling wave was measured and plotted as a function of the parameter d/L(o) and compared to linear wave theory. A noticeably higher celerity was measured in the free stream than was measured by hot film shear sensors in the boundary layer. Hot film shear sensors were also used to determine the phase relationship between shear stress and free stream particle velocity. Data results indicate that the maximum shear stress in an oscillatory flow field leads the maximum particle velocity by approximately 30 degrees - 35 degrees and that this has increased with distance from the bottom. The phase difference was also found to be dependent upon the length of the incident wave. (Author)

Descriptors :   (*OCEAN WAVES, BEACHES), HYDRAULIC MODELS, EXPERIMENTAL DESIGN, TEST EQUIPMENT, DETECTORS, SHEAR STRESSES, VELOCITY, COMPUTER PROGRAMS

Subject Categories : Physical and Dynamic Oceanography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE