Environmental Engineering Reference
In-Depth Information
4.3 Wave Interaction with a Floating Object
In this last case, the theory described in Sect. 2.9.1 (periodic boundary conditions) and
2.9.2 (floating objects) is applied for the interaction of waves with a floating object
(a boat in this case). Table 5 contains the SPH parameters used in this simulation.
The physics of a fluid-driven object (the boat) is simulated in this case. In this
simulation waves propagate pushing the boat that is located close to a dock (Fig. 7 ),
where wave propagation, reflection and breaking play an important role. The moment
of inertia, the centre of mass and the total weight of the object are considered to
provide a realistic movement of the boat.
5 Conclusions
The DualSPHysics code has been developed to study complex free-surface flows
requiring high computational resources.
A complete description of the SPH formalism implemented in DualSPHysics is
presented. This work addresses a review of the governing equations such as the
momentum and continuity equations, density filters, velocity corrections, time step-
ping schemes and boundary conditions.
The code is validated with the experimental data of a dam break impacting an
obstacle. The experiment is a benchmark for the free-surface flow SPH community
( http://wiki.manchester.ac.uk/spheric/index.php/Test2 ) and provides water elevation
and pressure data sampled at different locations. The simulations show a close agree-
ment between the numerical and experimental results both for free-surface elevations
and pressures.
Three examples have been shown to illustrate some of the capabilities of the
DualSPHysics code to simulate wave propagation, wave interaction with coastal
structures and the movement of floating objects.
References
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Barreiro A, Crespo AJC, Domínguez JM, Gómez-Gesteira M (2013) Smoothed particle hydrody-
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Batchelor GK (1974) Introduction to fluid dynamics. Cambridge University Press, Cambridge
Benz W (1990) Smoothed particle hydrodynamics: a review. Numerical modelling of nonlinear
stellar pulsations: problems and prospects. Kluwer Academic Publishers, Boston
Crespo AJC, Gómez-Gesteira M (2007) Boundary conditions generated by dynamic particles in
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