DEM-CFD study of the filter cake formation process due to non-spherical particles--颗粒学报PARTICUOLOGY

Deshpande, R., Antonyuk, S., & Iliev, O. (2020). DEM-CFD study of the filter cake formation process due to non-spherical particles. Particuology, 53, 48-57. https://doi.org/10.1016/j.partic.2020.01.003

DEM-CFD study of the filter cake formation process due to non-spherical particles

Ruturaj Deshpande ^{a b *}, Sergiy Antonyuk ^b, Oleg Iliev ^a

a Fraunhofer Institute for Industrial Mathematics ITWM, Kaiserslautern, Germany
b Institute of Particle Process Engineering, Technische Universität Kaiserslautern, Kaiserslautern, Germany

10.1016/j.partic.2020.01.003

Volume 53, December 2020, Pages 48-57

Received 1 July 2019, Revised 15 November 2019, Accepted 8 January 2020, Available online 20 March 2020, Version of Record 16 December 2020.

E-mail: ruturaj.deshpande@itwm.fraunhofer.de

Highlights

• Orientation of a sedimenting particle is considered.

• Orientation projects minimum possible area on plane normal to gravitational axis.

• Sedimentation velocity of a suspension increases with particle sphericity.

• Final void fraction of the filter cake increases with decreased particle sphericity.

• Interdependency analysis of particle sphericity, void fraction, and pressure drop.

Abstract

The formation of a filter cake during the filtration of a suspension with non-spherical particles is studied using a multi-sphere model in a simulation that couples the discrete element method with computational fluid dynamics. The implementation of the coupling with a drag model that considers orientation, sphericity, and the presence of surrounding particles for non-spherical particles is tested for single particles and suspensions by comparing the terminal velocities with empirical results. Phenomena predicted in the simulations, such as the presence or absence of initial oscillations and changes in the orientation of a particle, are consistent with experimental observations reported in the literature. The variation in the void fraction of a filter cake with respect to the particle sphericity is obtained and compared with experimental trends reported in the literature. Furthermore, complex interdependencies of the particle sphericity, void fraction, and pressure drop of a filter cake for a wide range of fluid conditions are investigated.

Graphical abstract

Keywords

Filter cake formation; Discrete element method–computational fluid dynamics simulation; Non-spherical particles

文章导读