Development of in/outflow boundary conditions for MPM simulation of uniform and non-uniform open channel flows

Development of in/outflow boundary conditions for MPM simulation of uniform and non-uniform open channel flows

Zhao, Xuanyu (University of Cambridge)
Bolognin, M. (TU Delft Hydraulic Structures and Flood Risk)
Donfang, Lian (University of Cambridge)
Rohe, A. (Deltares)
Vardon, P.J. (TU Delft Geo-engineering)

2019-01-30

This paper describes the development and application of inflow and outflow boundary conditions (BCs) for the material point method (MPM) in order to simulate fluid flow problems. This corresponds to velocity and pressure controlled BCs. Due to the coupled Lagrangian and Eulerian description of the fluid motion in MPM it is necessary to add and remove material points, with appropriate kinematic properties, to and from the computational domain. The newly-developed BCs have been used to simulate uniform open channel flow and the phenomenon of free overfall in open channels, which is transient conditions leading to non-uniform flow due to a sudden bed level drop. It is shown that the numerical results predict well the flow geometry including end depth ratio, pressure distribution and accelerations, therefore the velocities and displacements.

Material point method
Inflow/outflow boundary conditions
Free overfall
Open channel flows

http://resolver.tudelft.nl/uuid:d257b512-074b-48dc-8e62-a5093f4ed54f

https://doi.org/10.1016/j.compfluid.2018.10.007

2019-04-08

0045-7930

Computers & Fluids, 179, 27-33

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 Xuanyu Zhao, M. Bolognin, Lian Donfang, A. Rohe, P.J. Vardon