THE SPIRAL WAVEMAKER FOR LITTORAL DRIFT STUDIES.

R. A. DALRYMPLE, R. G. DEAN

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

A TECHNIQUE FOR SIMULATING AN INFINITELY LONG BEACH IN THE LABORATORY IS INTRODUCED, WITH THE OBJECTIVE OF ELIMINATING END EFFECTS USUALLY PRESENT WITH SHORT STRAIGHT BEACH SECTIONS.THE TECHNIQUE INVOLVES THE SPIRAL WAVEMAKER GENERATING WAVES IN THE CENTRE OF A CIRCULAR BASIN.LTHE WAVEMAKER, CONSISTING OF A VERTICAL RIGHT-CIRCULAR CYLINDER OSCILLATING IN A SMALL CIRCLE ABOUT ITS AXIS, IS DESCRIBED IN DETAIL.THEORETICAL DEVELOPMENTS, USING SMALL-AMPLITUDE WAVE ASSUMPTIONS, SHOW THAT THE SURFACE WAVE CRESTS GENERATED BY THE WAVEMAKER MAY BE DESCRIBED, AT A PARTICULAR TIME, AS AN ARCHIMEDIAN-TYPE OF SPIRAL, WITH THE WAVEMAKER AT ITS ORIGIN.ALSO, THE CRESTS IMPINGE ON THE CIRCULAR BEACH EVERYWHERE AT THE SAME ANGLE OF INCIDENCE.LEXPERIMENTS WITH A PROTOTYPE SPIRAL WAVEMAKER VERIFY THE THEORY, WITH CLOSE RESULTS FOR SHALLOW WATER WAVES.LITTORAL DRIFT APPLICATIONS OF THE WAVEMAKER ARE GIVEN.(A)

Original languageEnglish (US)
Pages (from-to)689-705
Number of pages17
JournalPROC. 13TH COASTAL ENGNG. CONF. (VANCOUVER)
Volume1
Issue number(JULY 10-14, 1972)
DOIs
StatePublished - Jan 1 1972

ASJC Scopus subject areas

  • Engineering(all)

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