Small-Scale Morphology and Boundary Layer Processes: Measurement and Modeling

Abstract

The main goal of the research project is to contribute to a better understanding of the basic mechanisms controlling sediment transport in the nearshore regions. In particular, the structure of the flow in the bottom boundary layer is of interest along with its interaction with sediment dynamics and bottom morphology. We want to look at the dynamics of the coherent vortex structures that are generated at the bottom of sea waves by the instability of the laminar boundary layer and the development of turbulence, the nonlinear interaction of the oscillatory boundary layer with a wavy bed of small amplitude and with a sloping bottom, and the separation of the boundary layer at the crests of 2-D ripples of large amplitude. The flow will then be used to study sediment dynamics and the processes that lead to the formation of small- and medium-scale bedforms.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA551428

Entities

People

  • Edward B. Thornton
  • Paolo Blondeaux

Organizations

  • University of Genoa

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Boundaries
  • Boundary Layer
  • Dynamics
  • Flow
  • Flow Fields
  • Laminar Boundary Layer
  • Layers
  • Measurement
  • Regions
  • Reynolds Number
  • Sedimentation
  • Simulations
  • Stratified Fluids
  • Three Dimensional
  • Turbulence
  • Two Dimensional

Readers

  • Coastal Oceanography
  • Fluid Dynamics.