Articles | Volume 14, issue 1
https://doi.org/10.5194/dwes-14-53-2021
https://doi.org/10.5194/dwes-14-53-2021
Research article
 | 
09 Feb 2021
Research article |  | 09 Feb 2021

Can terminal settling velocity and drag of natural particles in water ever be predicted accurately?

Onno J. I. Kramer, Peter J. de Moel, Shravan K. R. Raaghav, Eric T. Baars, Wim H. van Vugt, Wim-Paul Breugem, Johan T. Padding, and Jan Peter van der Hoek

Video supplement

Videos of terminal settling experiments in water: path instabilities [Data set] 4TU.Centre for Research Data, 2020 O. J. I. Kramer, S. K. R. Raaghav, and W. P. Breugem https://doi.org/10.4121/uuid:3ffdfa51-38f0-4188-aec5-8cd8fc8f1941

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Short summary
Our work investigates the settling behaviour of natural granules applied in drinking water treatment plants. We show that these natural granules have a tendency to show a considerably large deviation in terms of their settling velocity; this is contrary to what many velocity prediction models assume. In the current work, we present and discuss the factors which contribute to the observed deviation in drag and settling velocity. It connects full-scale operations and research.