Reflection Of Regular Waves Research Articles

Solitary wave interaction with an impervious house in the coastal community using a parallel three-dimensional incompressible CIP-based model

Three-dimensional numerical investigations on solitary wave interaction with an impervious house in the coastal community using a parallel incompressible CIP-based model are carried out. Simple and effective parallel computation will be realized based on algorithm of domain decomposition method and hybrid OpenMPI–OpenMP computational framework. The convection term is discretized by a constrained interpolation profile (CIP) method and an accurate interface capturing scheme, the Tangent of Hyperbola for Interface Capturing with Slope Weighting (THINC/SW), is applied to reconstruct the free surface. The reliability of the present model is validated by a series of benchmarks, including regular wave interaction with a single cylinder, regular wave reflection and diffraction on a vertical structure and interactions between a solitary wave and an impervious structure. The present results are in good agreement with the published results. The present model is applied to investigate the solitary wave reflection and diffraction on the house with different roof types. The variations of wave force, wave elevation and free surface are investigated, which considers the effect of natural disasters such as tsunamis on the safety of the house with different roof types in the coastal community. These results provide engineering references for the design of tsunami-resilient houses.

A multi-region coupling scheme for compressible and incompressible flow solvers for two-phase flow in a numerical wave tank

We present a multi-region coupling procedure based on the finite-volume method and apply it to two-phase hydrodynamic free surface flow problems. The method combines the features of one incompressible and one compressible two-phase flow solvers to obtain a coupled system which is generally superior to either solver alone. The coupling strategy is based on a partitioned approach in which different solvers, pre-defined in different regions of the computational domain, exchange information through interfaces, i.e. areas separating these regions. The interfaces act as boundary conditions passing the information from one region to the other mimicking the finite-volume cell-to-face interpolation procedures. This results in high performance computing coupled simulations whose functionality can be further extended in order to build a generic numerical wave tank accounting for incompressible flow regions as well as compressibility and aeration effects. We select a series of preliminary benchmarks to verify this coupling procedure which includes the simulation of a hydrodynamic dam break, the propagation and reflection of regular waves, the convection of an inviscid vortex, pseudocavitation, a water column free drop in a closed tank and a plunging wave impact at a vertical wall. The obtained results agree well with exact solutions, laboratory experiments and other numerical data.

SPH-LES MODEL FOR WAVE DISSIPATION USING A CURTAIN WALL

The transmission and reflection of regular waves by a half immersed curtain wall is studied by measuring the transmitted and reflected wave histories in the experiment. The experiment investigations were conducted for three different wave heights H=0.06, 0.07 and 0.08 m with a period of 1.5 s in a wave flume of 50.0 m long, 1.0 m wide and in a constant water depth of 0.72 m. The curtain wall is set on a 1/100 slope with the immersion depth of 0.1 m. The Smoothed Particle Hydrodynamics (SPH) model is employed to reproduce the experimental wave profiles and velocities. The turbulence was dealt with by incorporating a Large Eddy Simulation (LES) model into the numerical code.

Discussion of “ Measurement of Regular Wave Reflection ” by Michael Isaacson (November/December, 1991, Vol. 117, No. 6)

Discussion of “ <i>Measurement of Regular Wave Reflection</i> ” by Michael Isaacson (November/December, 1991, Vol. 117, No. 6)