Author/Authors :
López, D Hydraulics Laboratory - Centro de Estudios Hidrogr´aficos, Madrid, Spain , Ramos, T Hydraulics Laboratory - Centro de Estudios Hidrogr´aficos, Madrid, Spain , Sánchez, P TU Delft, Delft, The Netherlands , Marivela, R Virginia Tech, Blacksburg, Virginia, USA , Díaz, R Hydraulics Laboratory - Centro de Estudios Hidrogr´aficos, Madrid, Spain , Rebollo, J. J Hydraulics Laboratory - Centro de Estudios Hidrogr´aficos, Madrid, Spain , Andrés, F. R Hydraulics Laboratory - Centro de Estudios Hidrogr´aficos, Madrid, Spain , Cuellar, V Wawecrafters. SA., Madrid, Spain , De Blas, M Conhidra, Madrid, Spain , García, J. L Polytechnic University of Madrid, Madrid, Spain
Abstract :
To date, the Smoothed Particle Hydrodynamics (SPH) method has been successfully applied to reproduce the
hydrodynamics behind three-dimensional flow-structure interactions. However, as soon as the effect of flow
resistance becomes significant, the results obtained are not consistent with observations. This is the case for
open channel flows (OCF), in which the water surface is largely influenced by the boundary friction. The
roughness generated by the current boundary condition methodologies is solely numerical and cannot be
associated to physical values of friction. In light of this challenge, the authors present a novel formulation for
the friction boundary condition. The new implementation includes an additional shear stress at the boundaries
to reproduce roughness effects, allowing for the adequate three-dimensional simulation of open channel flows
using the SPH method. Finally, in order to reduce the high computational cost, typical of the Lagrangian
models, without interfering in the representativeness of the SPH simulations, a criterion to define the adequate
fluid particle size is proposed.
Keywords :
Computational Fluid Dynamics (CFD) , Boundary friction methodology , Bed roughness , Three-dimensional Simulations , Open Channel Flow (OCF) , Smoothed Particle Hydrodynamics (SPH)
