Model Numerik 2-Dimensi Perambatan Gelombang pada Perairan Dalam Sampai Peraiaran Dangkal Menggunakan Persamaan Boussinesq
Abstract. Two-Dimensional model of wave propagation from relatively deep water to shallow water has been developed in this study. The model was based on the extended Boussinesq equations derived by Nwogu . The Equations were solved using a time splitting technique in which the two-dimensional Boussinesq equations were split into several one-dimensional initial value problems including convection, propagation and dispersion problems respectively. The convection and propagation problems were solved using Explicit MacCormack scheme while dispersion problems were solved using fourth order central scheme. The model has been used to simulate shoaling, refraction and diffraction of regular wave setup in laboratories by previous authors, including, effect of bathymetric variation to wave refraction-diffraction by Berkhoff et al in 1982 [Wei and Kirby, 1998], wave refraction-diffraction by Whalin in 1971 [Wei and Kirby, 1998] and shoaling experiment by Chawla . omparisons between the model predictions and data show good agreement. Thus, the model is capable of predicting wave transformation due to varying bathymetry.
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