VOF-DEM-FEM Combined Model of the Reef Breakwater Collapse

A combined model was built of three main modules based on the Volume of Fluid (VOF) method, Discrete Element Method (DEM), and Finite Element Method (FEM). It was proposed to utilize this model to simulate the deformation of the rubble mound and the sandy bed due to surface wave action. The model in...

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Bibliographic Details
Published in:Coastal Engineering Journal 2009-09, Vol.51 (3), p.223-242
Main Authors: Maeno, Shiro, Bierawski, Lechoslaw G., Magda, Waldemar, Ogawa, Makoto
Format: Article
Language:English
Subjects:
Breakwalls
Breakwaters
Coastal structures
Collapse
combined numerical model
Computational fluid dynamics
Computer simulation
Data transfer (computers)
Deformation
DEM
Destruction
destructive numerical model
Discrete element method
FEM
Finite element method
Fluid flow
Fluids
Handles
Laboratory tests
Marine
Mathematical analysis
Mathematical models
Modules
Permeability
Porosity
Positioning
Reefs
submerged breakwater
Surface waves
VOF
Wave motion
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Summary:A combined model was built of three main modules based on the Volume of Fluid (VOF) method, Discrete Element Method (DEM), and Finite Element Method (FEM). It was proposed to utilize this model to simulate the deformation of the rubble mound and the sandy bed due to surface wave action. The model included the full interaction between wave motion with free surface and replaceable separate particles of the rubble mound. Momentary arrangement of the fluid, particles and resulting permeability was tracked within a domain of time and two-dimensional space by maintaining cyclic data transfer between the three method modules. A new technique of porosity adjustment was presented. The model results were compared to small-scale laboratory test results. Based on the comparison, the VOF-DEM-FEM model appeared to be a promising tool to handle the destruction process of the rubble coastal structures built on a permeable bottom.
ISSN:2166-4250
0578-5634
1793-6292
DOI:10.1142/S057856340900203X