Author(s)

L.H. Wong & S.M. Calisal

Abstract

Flow calculations for a ship travelling in the vicinity of a pycnocline L.H. Wong, S.M. Calisal Department of Mechanical Engineering, University of British Columbia, 2324 Main Mall, Vancouver, B.C., Canada, V6T 1Z4 ABSTRACT This paper reports on a numerical procedure for the potential flow, time domain computation of waves generated by a body advancing slowly in the vicinity of a shallow pycnocline, a region in a fluid where density variation over depth is significant. The problem is simplified in that the fluid is assumed to consist of two distinct layers of slightly different densities with a discontinuity of the Brunt-Vaisala number at their interface. Slender body theory is used to convert the three dimensional moving ship problem into a series of two dimensional time domain wavemaker problems in the plane of the stations, and marching from bow towards aft. The boundary element method is used to compute flow around each section. While velocities and pres

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