contributor author | Papadimitrakis, Yiannis Alex | |
contributor author | Hsu, En Yun | |
contributor author | Street, Robert L. | |
date accessioned | 2017-06-09T14:47:19Z | |
date available | 2017-06-09T14:47:19Z | |
date copyright | 1984/12/01 | |
date issued | 1984 | |
identifier issn | 0022-3670 | |
identifier other | ams-26789.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4163721 | |
description abstract | The structure of the velocity field over a propagating wave of fixed frequency is examined. The vertical and horizontal velocities were measured in a transformed Eulerian wave-following frame of reference in a wind-wave research facility at Stanford University. Experimental results are given for seven different wind speeds in the range 140?402 cm s?1, with 1 Hz, 2.54 cm nominal amplitude, mechanically-generated sinusoidal water waves. The mean velocity profiles have a log-linear form with a wake free-stream characteristic. The constant C which characterizes these profiles decreases with increasing wind speed, as a result of the variation of surface roughness condition between the transition region and the fully rough regime. The wave-associated stresses with their main component at twice the fundamental wave frequency were found to be significant. Therefore, the nonlinear terms encountered in the wave-induced Navier-Stokes equations associated with these stresses cannot be neglected, and linearization of the above equations is not permissible. The wave-induced velocity field and the wave-perturbed turbulence were found to depend significantly on the ratio of the wave speed to the mean free-stream wind velocity, c/Uδ0. | |
publisher | American Meteorological Society | |
title | On the Structure of the Velocity Field over Progressive Mechanically-Generated Water Waves | |
type | Journal Paper | |
journal volume | 14 | |
journal issue | 12 | |
journal title | Journal of Physical Oceanography | |
identifier doi | 10.1175/1520-0485(1984)014<1937:OTSOTV>2.0.CO;2 | |
journal fristpage | 1937 | |
journal lastpage | 1948 | |
tree | Journal of Physical Oceanography:;1984:;Volume( 014 ):;issue: 012 | |
contenttype | Fulltext | |