Articles | Volume 14, issue 1
Drink. Water Eng. Sci., 14, 53–71, 2021
https://doi.org/10.5194/dwes-14-53-2021
Drink. Water Eng. Sci., 14, 53–71, 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 et al.

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Cited articles

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Arsenijević, Z. L., Grbavčić, Ž. B., Garić-Grulović, R. V., and Bošković-Vragolović, N. M.: Wall effects on the velocities of a single sphere settling in a stagnant and counter-current fluid and rising in a co-current fluid, Powder Technol., 203, 237–242, https://doi.org/10.1016/j.powtec.2010.05.013, 2010. 
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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.