Hybrid free-surface flows in a two-dimensional channel

Hybrid free-surface flows in a two-dimensional channel.

Hybrid free-surface flows past disturbances in a two-dimensional channel are identified and studied. The fluid is assumed to be inviscid and incompressible, and the flow to be steady and irrotational. The disturbances consist of a step in the bottom of the channel and a flat object lying on the free-surface (e.g., a sluice gate). A weakly nonlinear one-dimensional analysis is used to classify t...

Hybrid Parallelization Techniques for Lattice Boltzmann Free Surface Flows

In the following, we will present an algorithm to perform adaptive free surface simulations with the lattice Boltzmann method (LBM) on machines with shared and distributed memory architectures. Performance results for different test cases and architectures will be given. The algorithm for parallelization yields a high performance, and can be combined with the adaptive LBM simulations. Moreover,...

‎Incompressible ‎smoothed particle hydrodynamics simulations on free surface flows

‎The water wave generation by wave paddle and a freely falling rigid body are examined by using an Incompressible Smoothed Particle Hydrodynamics (ISPH)‎. ‎In the current ISPH method‎, ‎the pressure was evaluated by solving pressure Poisson equation using a semi-implicit algorithm based on the projection scheme and the source term of pressure Poisson equation contains both of divergence free ve...

Generalized Finite Difference Method for Two-dimensional Transient Free- Surface Flows

In this study, we developed a novel numerical model, based on the generalized finite difference method (GFDM), to simulate two-dimensional unsteady free-surface flows. The mathematical descriptions for two-dimensional unsteady free-surface flows, which can be derived by vertically integrating the Navier-Stokes equations, are the well-known shallow water equations. The shallow water equations ar...

Numerical Investigation of the Structure of Density Currents in a two Dimensional Channel