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High-angle formulation for the nonlinear progressive-wave equation model
Ist Teil von
Wave motion, 2000-02, Vol.31 (2), p.165-171
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2000
Link zum Volltext
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
The nonlinear progressive-wave equation (NPE) model has been reformulated for wider propagation angle accuracy. The wide angle NPE results from range-integrating the second order time domain nonlinear wave equation rather than reducing it to a first order equation in time as in the original NPE. The numerical implementation of the second order NPE retains two time levels rather than one. The resulting model is refered to as NPE2. Benchmark tests reveal RMS errors in the model are reduced by nearly a factor of 10 for moderately high propagation angles as compared to errors in similar tests of the first order NPE.