Articles | Volume 14, issue 1
Drink. Water Eng. Sci., 14, 53–71, 2021
Drink. Water Eng. Sci., 14, 53–71, 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.

Related authors

Shower heat exchanger: reuse of energy from heated drinking water for CO2 reduction
Z. Deng, S. Mol, and J. P. van der Hoek
Drink. Water Eng. Sci., 9, 1–8,,, 2016
Short summary

Related subject area

Substances: Particles
Modeling particle transport and discoloration risk in drinking water distribution networks
Joost van Summeren and Mirjam Blokker
Drink. Water Eng. Sci., 10, 99–107,,, 2017
Short summary
A new model for the simplification of particle counting data
M. F. Fadal, J. Haarhoff, and S. Marais
Drink. Water Eng. Sci., 5, 9–14,,, 2012

Cited articles

Abraham, F. F.: Functional dependence of drag coefficient of a sphere on Reynolds number, Phys. Fluids, 13, 2194–2195,, 1970. 
Albright, J.: Albright's chemical engineering handbook, CRC Press, New York, USA, 2009. 
Almedeij, J.: Drag coefficient of flow around a sphere: Matching asymptotically the wide trend, Powder Technol., 186, 218–223,, 2008. 
Amburgey, J. E.: Optimization of the extended terminal subfluidization wash (ETSW) filter backwashing procedure, Water Res., 39, 314–330,, 2005. 
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,, 2010. 
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.