Accession Number : AD0612811

Title :   ON THE GENERATION OF SHORT TWODIMENSIONAL SURFACE WAVES BY OSCILLATING SURFACE CYLINDERS OF ARBITRARY CROSSSECTION,

Corporate Author : STANFORD UNIV CALIF

Personal Author(s) : Holford,R. L.

Report Date : 26 MAR 1965

Pagination or Media Count : 41

Abstract : A simple method is given for determining the amplitude and phase of the surface waves generated by the forced high-frequency oscillations of a cylinder of arbitrary cross-section which is partially immersed, with its axis horizontal, in the free surface of an unbounded fluid. The velocity potential of the forced motion of the fluid is split into two components: the first corresponds to the limit of infinite frequency, for which surface waves are absent, and the second corresponds to the surface-wave motion induced by applying certain pressure forces over the otherwise free surface in the presence of a fixed cylinder. An approximation is then made in which the cylinder is replaced by its tangent plane along a line of intersection of the cylinder and fluid surface. The asymptotic values of the amplitude and phase of the generated waves are calculated for a variety of cross-sections, and the results are found to be in agreement with those which have been obtained rigorously for the cases of a half-immersed circular cylinder and a dock. (Author)

Descriptors :   (*WATER WAVES, SURFACE PROPERTIES), (*CYLINDRICAL BODIES, OSCILLATION), FLUID DYNAMICS, TWO DIMENSIONAL FLOW, BOUNDARY VALUE PROBLEMS, POTENTIAL THEORY, MOTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE