Incompressible SPH simulation of open channel flow over smooth bed
Tan, Soon Keat
Date of Issue2015
School of Civil and Environmental Engineering
Nanyang Environment and Water Research Institute
The Smoothed Particle Hydrodynamics (SPH) modelling techniques are used in a variety of coastal hydrodynamic applications, but only limited works have been documented in the open channel flows. In this paper, we use the incompressible SPH model combined with an improved inflow boundary scheme to investigate the open channel flows in a laboratory scale. The inflow and outflow boundary conditions are treated by generating and removing the fluid particles at the channel end. The proposed ISPH model has been applied to the open channel laminar and turbulent flows of different flow depths and the computational results have been verified against the analytical solutions. Model convergence has been investigated through the numerical tests using different particle spacings and time steps. The artificial boundary drag force of numerical nature has been found under certain flow conditions. As further application of the model, two additional tests are also carried out, involving alternative solid boundary treatment and more complex channel topography. The present study could provide useful information on further exploitation of the SPH modelling technique in river hydrodynamics.
DRNTU::Engineering::Civil engineering::Water resources
Journal of hydro-environment research
© 2015 International Association for Hydro-environment Engineering and Research, Asia Pacific Division. This is the author created version of a work that has been peer reviewed and accepted for publication in Journal of Hydro-environment Research, published by Elsevier on behalf of International Association for Hydro-environment Engineering and Research, Asia Pacific Division. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.jher.2014.12.006].