TY - JOUR
T1 - An efficient and robust tsunami model on unstructured grids. Part I
T2 - Inundation benchmarks
AU - Zhang, Yinglong J.
AU - Baptista, António M.
N1 - Funding Information:
The authors thank Dr. George Priest for his steadfast support, constant encouragement and guidance over the years. The Oregon Department of Geology and Mineral Industries and National Science Foundation (ACI-0121475; OCE-0424602) provided financial support for this research. Any statements, opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views or policies of the federal sponsors, and no official endorsement should be inferred.
PY - 2008
Y1 - 2008
N2 - A modern multi-purpose baroclinic circulation model (SELFE) has been recently extended to include the ability to simulate tsunami propagation and inundation. The core model is based on the 3-D nonlinear shallow-water wave (NSW) equations, which are solved on unstructured grids, using the finite-element method. A semi-implicit method is used to solve all equations to enhance numerical stability, thus bypassing the most stringent CFL restriction on the time step. Further aided algorithmically by an Eulerian-Lagrangian solution of the advection terms in the momentum equation and by a simple yet effective inundation algorithm, SELFE is very efficient and robust in both quasi-2-D (with two vertical layers) and 3-D modes. A quasi-2-D version of the model is being used to update and expand the characterization of tsunami hazards along the Oregon coast. As a part of a rigorous testing procedure that includes multiple types of coastal problems, we present in this paper a quantitative assessment of performance of the quasi-2-D SELFE for two challenging open benchmark problems proposed in the 3rd International Workshop on Long-wave Runup Models. Satisfactory results are obtained for both problems.
AB - A modern multi-purpose baroclinic circulation model (SELFE) has been recently extended to include the ability to simulate tsunami propagation and inundation. The core model is based on the 3-D nonlinear shallow-water wave (NSW) equations, which are solved on unstructured grids, using the finite-element method. A semi-implicit method is used to solve all equations to enhance numerical stability, thus bypassing the most stringent CFL restriction on the time step. Further aided algorithmically by an Eulerian-Lagrangian solution of the advection terms in the momentum equation and by a simple yet effective inundation algorithm, SELFE is very efficient and robust in both quasi-2-D (with two vertical layers) and 3-D modes. A quasi-2-D version of the model is being used to update and expand the characterization of tsunami hazards along the Oregon coast. As a part of a rigorous testing procedure that includes multiple types of coastal problems, we present in this paper a quantitative assessment of performance of the quasi-2-D SELFE for two challenging open benchmark problems proposed in the 3rd International Workshop on Long-wave Runup Models. Satisfactory results are obtained for both problems.
KW - Cross-scale modeling
KW - Eulerian-Lagrangian Method
KW - Finite elements
KW - Semi-implicit model
KW - Tsunami inundation
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U2 - 10.1007/s00024-008-0424-7
DO - 10.1007/s00024-008-0424-7
M3 - Article
AN - SCOPUS:59549101648
SN - 0033-4553
VL - 165
SP - 2229
EP - 2248
JO - Pure and Applied Geophysics
JF - Pure and Applied Geophysics
IS - 11-12
ER -