Forces on sanitary solids in small sewers
Butler, D.; Littlewood, K.; Orman, N.
Water Science and Technology a Journal of the International Association on Water Pollution Research 52(3): 85-92
2005
ISSN/ISBN: 0273-1223 PMID: 16206847 Document Number: 594518
An experimental and modelling study has been carried out to investigate the movement mechanisms and behaviour of large sanitary solids in small sewers. The overall performance of the model has already been verified in terms of limiting solids transport distance, but in this paper the wave profile across the solid is also shown to fit model predictions well when compared visually. Further insight into how solids behave is also explored in this paper by plotting the interplay of the main horizontal and vertical forces acting on the solid. These results illustrate the dynamics of movement initiation, transport and deposition and indicate the most important forces. Model predictions of movement 'time per hop' have also been experimentally verified, giving further credence to the model. Experimental verification of the magnitude of the forces involved is planned.