On the numerical modelling of initiation of sediment transport using Smoothed Particle Hydrodynamics

• Published in: Proceedings in applied mathematics and mechanics Vol. 17; no. 1; pp. 507 - 508
• Main Authors: Falkner, Nadine, Steeb, Holger
• Format: Journal Article
• Language: English
• Published: Berlin WILEY‐VCH Verlag 01.12.2017
• ISSN: 1617-7061; 1617-7061
• DOI: 10.1002/pamm.201710223

Mobilization of solid particles at the interface between a porous and a free flow domain is a relevant subject in many fields of mechanical, civil and environmental engineering. One example is the initiation of sediment transport as it appears in river beds. To approximate this initiation state, various theoretical models exist. Common approaches use two‐domain formulations as in [1] or one‐domain formulations as in [6]. The named approaches were compared with Direct Numerical Simulations (DNS) using Smoothed Particle Hydrodynamics (SPH) in [3]. The results of these simulations showed that the theoretical models often underestimate the occurring velocities at the interface and therefore critical velocities to initialize the motion of single grains can be lower than predicted by theoretical approaches. In our numerical simulations, we study creeping flow in a free flow domain coupled to flow in a porous media applying various porous structures. To investigate velocities and shear stresses at the interface more intensively we then compare our numerical results to data from experiments that were performed on equivalent microstructures. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)