Accession Number : ADA588393


Title :   A Local Nonlinear Interpretation of PUV Measurements


Descriptive Note : Journal article


Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB


Personal Author(s) : Sobey, Rodney J ; Hughes, Steven A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a588393.pdf


Report Date : Jan 1999


Pagination or Media Count : 21


Abstract : A time domain method is presented for analyzing simultaneous measurements of pressure and the horizontal components of velocity obtained beneath irregular multidirectional wave fields. This new method differs from the usual linear directional analyses applied to PUV data in two important aspects. First, the essential nonlinearity of the measured waves is not sacrificed to achieve a solution. Therefore, predictions of sea surface elevation and directional kinematics throughout the water column accurately portray the actual nonlinear character of the waves. Second, the analysis method is local in that it can be applied to segments of PUV time series much shorter than an individual wave. The viability of the locally nonlinear methodology developed in this paper is proven by demonstrating agreement with higher-order theoretical steady waves. Predictions of sea surface elevation and wave kinematics are also made using actual measurements from PUV instruments at two ocean sites off the west coast of the United States.


Descriptors :   *MATHEMATICAL ANALYSIS , *MEASUREMENT , *OCEAN WAVES , *VELOCITY , COASTAL REGIONS , DATA PROCESSING , ELEVATION , HORIZONTAL ORIENTATION , INSTRUMENTATION , KINEMATICS , LINEAR SYSTEMS , METHODOLOGY , NONLINEAR SYSTEMS , OCEANS , PREDICTIONS , REPRINTS , SITES , SOLUTIONS(GENERAL) , SURFACES , SYNCHRONISM , TIME DOMAIN , TIME SERIES ANALYSIS , VIABILITY , WATER


Subject Categories : Physical and Dynamic Oceanography
      Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE