<abstract xmlns="http://www.w3.org/1999/xhtml">The paper presents validation of a mathematical model describing the friction factor by comparing the predicted and measured results in a broad range of solid concentrations and mean particle diameters. Three different types of solids, surrounded by water as a carrier liquid, namely Canasphere, PVC, and Sand were used with solids density from 1045 to 2650 kg/m3, and in the range of solid concentrations by volume from 0.10 to 0.45. All solid particles were narrowly sized with mean particle diameters between 1.5 and 3.4 mm. It is presented that the model predicts the friction factor fairly well. The paper demonstrates that solid particle diameter plays a crucial role for the friction factor in a vertical slurry flow with coarse solid particles. The mathematical model is discussed in reference to damping of turbulence in such flows. As the friction factor is below the friction for water it is concluded that it is possible that the effect of damping of turbulence is included in the <italic>KB</italic> function, which depends on the Reynolds number.</abstract>

The paper presents validation of a mathematical model describing the friction factor by comparing the predicted and measured results in a broad range of solid concentrations and mean particle diameters. Three different types of solids, surrounded by water as a carrier liquid, namely Canasphere, PVC, and Sand were used with solids density from 1045 to 2650 kg/m3, and in the range of solid concentrations by volume from 0.10 to 0.45. All solid particles were narrowly sized with mean particle diameters between 1.5 and 3.4 mm. It is presented that the model predicts the friction factor fairly well. The paper demonstrates that solid particle diameter plays a crucial role for the friction factor in a vertical slurry flow with coarse solid particles. The mathematical model is discussed in reference to damping of turbulence in such flows. As the friction factor is below the friction for water it is concluded that it is possible that the effect of damping of turbulence is included in the KB function, which depends on the Reynolds number.

Validation of friction factor predictions in vertical slurry flows with coarse particles

Faculty of Management and Computer Modelling

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The paper presents validation of a mathematical model describing the friction factor by comparing the predicted and measured results in a broad range of solid...

Validation of friction factor predictions in vertical slurry flows with coarse particles

Published Online: May 26, 2020

Page range: 119 - 127

Received: Dec 09, 2019

Accepted: Jan 24, 2020

DOI: https://doi.org/10.2478/johh-2020-0005

Keywords
Flow with coarse particles, Particle-wall stress, Modelling of vertical flow

© 2020 Artur Bartosik, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Validation of friction factor predictions in vertical slurry flows with coarse particles

Published Online: May 26, 2020

Page range: 119 - 127

Received: Dec 09, 2019

Accepted: Jan 24, 2020

DOI: https://doi.org/10.2478/johh-2020-0005

KeywordsFlow with coarse particles, Particle-wall stress, Modelling of vertical flow

© 2020 Artur Bartosik, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Flow with coarse particles, Particle-wall stress, Modelling of vertical flow