Accession Number:

ADA522452

Title:

Acceleration Effects on Fluid-Sediment Interaction

Descriptive Note:

Research rept.

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE RALPH M PARSONS LAB FOR WATER RESOURCES AND HYDRODYNAMICS

Personal Author(s):

Report Date:

2006-01-01

Pagination or Media Count:

7.0

Abstract:

The long-term goals of this research are 1 to identify all relevant physical processes that participate in and contribute significantly to sediment transport in near-shore coastal waters 2 to investigate each of the identified processes in order to understand the underlying physics in a quantitative manner 3 to develop simple predictive models for each process and 4 to incorporate the simple predictive process-models in a predictive model for beach profile response to the action of waves and currents. The present research is concerned with the effect of fluid accelerations, which is synonymous to pressure-gradients, on fluid-sediment interaction in near-shore waters, i.e. under near-breaking or broken waves. In particular, the objective is to ascertain the importance of the subsurface sediment transport rate induced purely by the strong pressure gradient acceleration associated with the passage overhead of the steep forward-leaning front of a near-breaking or broken wave relative to the surficial sheet flow sediment transport rate induced by shear stresses and pressure gradients.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE