Validation of fluid-particle interaction force relationships in binary-solid suspensions

• Published in: Particuology Vol. 23; no. 6; pp. 40 - 48
• Main Authors: Rotondi, Marco, Di Felice, Renzo, Pagliai, Paolo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2015
• Subjects: Buoyancy force; Drag force; Solid–fluid interaction forces; Solid–fluid suspensions; 二元; 动力相互作用; 固体; 实验证据; 悬浮液; 流体质点; 相互作用力; 颗粒沉降; Solid–fluid suspensions; Drag force; Solid–fluid interaction forces; Buoyancy force
• ISSN: 1674-2001; 2210-4291
• DOI: 10.1016/j.partic.2014.12.010

In this work several relationships governing solid-fluid dynamic interaction forces were validated against experimental data for a single particle settling in a suspension of other smaller particles. It was observed that force relationships based on Lattice-Boltzmann simulations did not perform as well as other inter- action types tested. Nonetheless, it is apparent that, in the case of a suspension of different particle types, it is important that the correct choice is made as to how the contribution to the overall fluid-particle interaction force is split between buoyancy and drag. Experimental evidence clearly suggests that the ＂generalized＂ Archimedes＇ principle （where the foreign particle is considered to displace the whole suspension and not just the fluid） provides the best result.