Direct numerical simulations of particle sedimentation with heat transfer using the Lattice Boltzmann method. (January 2017)

• Record Type: Journal Article
• Authors: Yang, Bo; Chen, Sheng; Liu, Kai
• Is Part Of: International journal of heat and mass transfer. Volume 104(2017:Jan.)
• Page Start: 419
• Page End: 437
• Publication Date: 2017-01
• Subjects: Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2016.08.032
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: The influences of Grashof number (Gr) on motion of double hot, double cold and one hot and one cold particles settling in vertical channel are systematically investigated respectively. A comprehensive comparison of interaction regimes among three cases (two hot, two cold, one hot and one cold particles) at the same condition is conducted for the first time. Abstract: In most realistic gas–solid flow, the difference of particles' temperature is significant. The heat transfer induced by temperature difference between particles will influence the behavior of gas–solid flow critically. In order to deepen our insights into this important topic, in this work three typical cases: (1) double hot particles, (2) double cold particles, and (3) one hot and one cold particle, are investigated with the aid of direct numerical simulation of the Lattice Boltzmann method. A comprehensive comparison is carried out between them and some new interesting phenomena are observed. Our results show that thermal convection between particles will influence their behaviors significantly.