Journal
JOURNAL OF HYDRAULIC RESEARCH
Volume 54, Issue 2, Pages 158-171Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00221686.2016.1140683
Keywords
direct numerical simulations; erosion processes; fluid-particle interactions; immersed boundary method; open-channel flow; particle entrainment; particle-laden flows
Categories
Funding
- German Research Foundation (DFG) [FR 1593/5-2]
- Gauss Centre for Supercomputing (GCS) [5122]
Ask authors/readers for more resources
This paper investigates erosion events in a turbulent open channel flow laden with monodisperse spherical particles. The data were generated in a previous study using direct numerical simulations with a phase-resolving immersed boundary method. The particles have a mobility below their nominal threshold of incipient motion and settle onto the rough bed that consists of a hexagonally packed layer of spheres with the same size. Conditioned averaging is employed to extract the characteristic features of an erosion event, defining a suitable criterion for detection and accounting for possible asymmetry of flow structures. The highly resolved dataset provides detailed insight into the key-mechanisms of erosion. The results show that a particle collision, together with a subsequent sweep event on time scales of several bulk units, is responsible for the erosion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available