A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Tsunami wave interaction with mangrove forests: A 3-D numerical approach
Abstract A three dimensional numerical approach based on IHFOAM to study the interaction of tsunami waves with mangrove forest is presented. As a first approximation, the problem is modelled by means of solitary waves impinging on emergent rigid cylinders. Two different conceptual approaches are implemented into IHFOAM. Solving the URANS equations provides a direct simulation of the flow field considering the actual geometry of the array of cylinders. A modified version of the volume-average URANS equations by introducing a drag force to model the momentum damping created by the cylinders is used in the second approach. Both the direct and macroscopic simulations are validated against laboratory experiments for wave damping with very high agreement. A large set of numerical experiments to analyse flow parameters and uniform and random cylinder array distributions are analysed and use to compare pros and cons of the different approaches. Large differences are found in the forces exerted on the vegetation for uniform and random distributions. Generalizations obtained from uniform arrangements could lead to underestimation of wave-exerted forces, especially for low dense configurations. Wave forces calculated with the macroscopic approach by means of the drag coefficient yields clear underestimations.
Highlights Solitary wave interaction with rigid plants Numerical simulations using 3-D URANS model Wave height evolution along the vegetation field Forces exerted on the rigid elements along the vegetation field
Tsunami wave interaction with mangrove forests: A 3-D numerical approach
Abstract A three dimensional numerical approach based on IHFOAM to study the interaction of tsunami waves with mangrove forest is presented. As a first approximation, the problem is modelled by means of solitary waves impinging on emergent rigid cylinders. Two different conceptual approaches are implemented into IHFOAM. Solving the URANS equations provides a direct simulation of the flow field considering the actual geometry of the array of cylinders. A modified version of the volume-average URANS equations by introducing a drag force to model the momentum damping created by the cylinders is used in the second approach. Both the direct and macroscopic simulations are validated against laboratory experiments for wave damping with very high agreement. A large set of numerical experiments to analyse flow parameters and uniform and random cylinder array distributions are analysed and use to compare pros and cons of the different approaches. Large differences are found in the forces exerted on the vegetation for uniform and random distributions. Generalizations obtained from uniform arrangements could lead to underestimation of wave-exerted forces, especially for low dense configurations. Wave forces calculated with the macroscopic approach by means of the drag coefficient yields clear underestimations.
Highlights Solitary wave interaction with rigid plants Numerical simulations using 3-D URANS model Wave height evolution along the vegetation field Forces exerted on the rigid elements along the vegetation field
Tsunami wave interaction with mangrove forests: A 3-D numerical approach
Maza, Maria (author) / Lara, Javier L. (author) / Losada, Inigo J. (author)
Coastal Engineering ; 98 ; 33-54
2015-01-08
22 pages
Article (Journal)
Electronic Resource
English
Tsunami wave interaction with mangrove forests: A 3-D numerical approach
| Online Contents | 2015
Tsunami wave interaction with mangrove forests: A 3-D numerical approach
| British Library Online Contents | 2015
Surface Wave Attenuation in Mangrove Forests
| British Library Conference Proceedings | 1997
Surface Wave Attenuation in Mangrove Forests
| British Library Conference Proceedings | 1997
Tsunami Wave Interaction with Data Buoys
| Online Contents | 2006