Numerical Modelling of 3D Oblique Waves by L-type Multiple Directional Wave Generator

摘要

The improvements on the oblique planar wave train in a basinrngenerated by multiple irregular wave generators are investigatedrnnumerically in this study. Though oblique waves of any desiredrnincident angle can be generated by serpentiform wave generators asrnthey were settled in a single line, the generations of waves are limitedrnin specific areas in the basin, which the effective experiment area withrnuniform wave field is narrow; therefore, most landforms and/or modelrnare located too close to the wave generators. In this study, numericalrnsimulations of desired oblique waves are generating separately butrnsimultaneously by the two series of serpent type wave generators set inrnL-shape to enlarge the effective experiment area. Based on thernLagrangian description with time-marching procedure, a threedimensionalrnmultiple directional wave basin was developed to simulaternocean waves by using the BEM with quadrilateral elements. Thernsimulations of perpendicular waves are executed in the first instance tornverify the scheme, and proceed with the generations and propagationsrnof oblique waves in larger angle. Accordingly, the comparison ofrnwaveforms variation confirms the estimation of oblique waves arnfeasible scheme.