0
RESEARCH PAPERS

A Computer-Based Electro-Optical System for Measuring Wave-Induced Sand Concentrations

[+] Author and Article Information
J. R. Glover, F. A. Locher, P. K. Bhattacharya

Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa

J. Basic Eng 94(2), 429-433 (Jun 01, 1972) (5 pages) doi:10.1115/1.3425439 History: Received November 29, 1971; Online October 27, 2010

Abstract

A computer-based system utilizing an electro-optical instrument has been developed for generating and processing a signal proportional to the instantaneous sand concentration at a point in a flow field. Herein are described the instrumentation and techniques used in a study of sediment entrainment by periodic waves breaking on sand beaches. The instantaneous sediment concentration has been decomposed as follows:

C(x, y, z, t) = C(x, y, z)
  + C(x, y, z, t) + Cp(x, y, z, t)
where C (x, y, z) is the temporal average concentration, C′ (x, y, z, t) is a random component of the sediment concentration, and Cp (x, y, z, t) is a repetitive component with period equal to the period of the breaking waves. Particular attention has been given to isolating the repetitive component which was so obscured by the signal characteristics that no periodicity was apparent on either an oscilloscope trace or a strip chart recorder. Spectral analysis was not applicable because the shape of the repetitive waveform, Cp (x, y, z, t), over one wave cycle was desired.

Copyright © 1972 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In