Print Email Facebook Twitter Stability of stones in the top layer of a granular filter: Literature survey Title Stability of stones in the top layer of a granular filter: Literature survey Author Hofland, B. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2000-10-01 Abstract In order to understand the processes involved in damaging a granular filter, the behaviour of the separate particles it is made of must be known. The hydrodynamic forces on the particles are very important for understanding this behaviour. These forces have been examined by many researchers. Chapter 2 deals with that aspect. The characteristics of stones, like shape, size and orientation influence these forces, so definitions of these characteristics, as well as their influence on stone stability are treated at the end of this chapter. The 3rd chapter of this report focuses on the stability of an entire bed, consisting of the particles that have been described in the first chapter. The stability is discussed first, followed by a description of some bed-lead transport formulas. Several basic aspects of the influence of turbulence on stone stability and transport are treated as well. The final chapter deals with flow characteristics in general. First of all boundary layer flow, especially over rough walls, will be treated. Research on turbulence-induced wall pressures-which might be used to correlate flow properties to stone stability-is a separate field which generated a lot of research over the last decades. A model for calculating pressure fluctuations on the bed that can be related to stone stability-is discussed. As it is expected that experiments with a backward-facing step will be executed, this flow configuration is described. The chapter will be extended with other configurations when it becomes clear which flow configurations will be used for experiments to come. Subject granular filterdamagetop layerstabilitybed stability To reference this document use: http://resolver.tudelft.nl/uuid:6fd62fc6-2eb8-4173-93f9-056fe1d5c6eb Publisher TU Delft, Department of Hydraulic Engineering Source Report no. 07-00 Part of collection Institutional Repository Document type report Rights (c) 2000 TU Delft, Department of Hydraulic Engineering Files PDF Hofland2000.pdf 7.31 MB Close viewer /islandora/object/uuid:6fd62fc6-2eb8-4173-93f9-056fe1d5c6eb/datastream/OBJ/view