Simulations of moving effect of coastal vegetation on tsunami damping
| Autor: | Ching-Piao Tsai, Tri Octaviani Sihombing, Chang Lin, Ying-Chi Chen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Wave propagation Computational fluid dynamics 01 natural sciences lcsh:TD1-1066 Physics::Geophysics 010305 fluids & plasmas Physics::Fluid Dynamics 0103 physical sciences Wave height Volume of fluid method medicine lcsh:Environmental technology. Sanitary engineering lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 Physics Turbulence business.industry lcsh:QE1-996.5 lcsh:Geography. Anthropology. Recreation Mechanics lcsh:Geology Classical mechanics lcsh:G Turbulence kinetic energy General Earth and Planetary Sciences medicine.symptom business Vegetation (pathology) Stationary state |
| Zdroj: | Natural Hazards and Earth System Sciences, Vol 17, Iss 5, Pp 693-702 (2017) |
| ISSN: | 1684-9981 |
| DOI: | 10.5194/nhess-17-693-2017 |
| Popis: | A coupled wave-vegetation simulation is presented for the moving effect of the coastal vegetation on tsunami wave height damping. The problem is idealized by solitary wave propagating on a group of emergent cylinders. The numerical model is based on general Reynolds-averaged Navier-Stokes equations associated with renormalization group turbulent closure model by using volume of fluid technique. The general moving object (GMO) model developed in CFD code Flow-3D is applied to simulate the coupled motion of vegetation with wave dynamically. The damping of wave height and the turbulent kinetic energy dissipation as waves passed over both moving and stationary cylinders are discussed. As comparing with the stationary cylinders, it obtains markedly less wave height damping and turbulent kinetic energy dissipation by the moving cylinders. The result implies that the wave decay by the coastal vegetation might be overestimated if the mangrove vegetation was represented as stationary state. |
| Databáze: | OpenAIRE |
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