Accession Number : AD0661479

Title :   EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE AIR VELOCITY PROFILE ABOVE PROGRESSIVE WAVES.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CALIF DEPT OF CIVIL ENGINEERING

Personal Author(s) : Shemdin,Omar H.

Report Date : JUL 1967

Pagination or Media Count : 64

Abstract : The influence of propagating waves on the mean velocity profile is sought especially. Both the instantaneous and mean velocity profiles were obtained with the use of high response total head and static pressure probes, in conjunction with a wave height gage. Experimental evidence is presented which suggests that the air velocity responds to the wave motion at the air-water interface. The dependence of the mean velocity profile on wave frequency is investigated over mechanically-generated waves having a constant amplitude. Also the dependence of the mean velocity profile on wave amplitude is investigated over mechanically-generated waves with a specified frequency. The results are viewed in light of a theoretically constructed velocity profile which incorporates the effect of wave-induced motion. The theoretical results suggest that the measured mean velocity profile is influenced by the wave motion in a vicinity of approximately three wave amplitudes above the mean water surface. The results also suggest that the wave influence is twofold. The first is due to the fact that a velocity measuring instrument continuously shifts streamlines when measuring the air velocity above a perturbed water surface. The second is due to the wave-induced perturbation in the air velocity. (Author)

Descriptors :   (*WATER WAVES, *WIND), VELOCITY, DRAG, AERODYNAMIC CHARACTERISTICS, PROPAGATION, INTERFACES, SURFACES, INTERACTIONS, MATHEMATICAL ANALYSIS

Subject Categories : Meteorology
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE