Segregation and intermixing in polydisperse liquid–solid fluidized beds: A multifluid model validation study

Shashank S. Tiwari, Swapnil V. Ghatage, Jyeshtharaj B. Joshi*, Bo Kong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Multifluid model (MFM) simulations have been carried out on liquid–solid fluidized beds (LSFB) consisting of binary and higher-order polydisperse particle mixtures. The role of particle–particle interactions was found to be as crucial as the drag force under laminar and homogenous LSFB flow regimes. The commonly used particle–particle closure models are designed for turbulent and heterogeneous gas–solid flow regimes and thus exhibit limited to no success when implemented for LSFB operating under laminar and homogenous conditions. A need is perceived to carry out direct numerical simulations of liquid–solid flows and extract data from them to develop rational closure terms to account for the physics of LSFB. Finally, a recommendation flow regime map signifying the performance of the MFM has been proposed. This map will act as a potential guideline to identify whether or not the bed expansion characteristics of a given polydisperse LSFB can be correctly simulated using MFM closures tested.
Original languageEnglish
JournalAICHE Journal
DOIs
StateSubmitted - 15 Apr 2022

Fingerprint

Dive into the research topics of 'Segregation and intermixing in polydisperse liquid–solid fluidized beds: A multifluid model validation study'. Together they form a unique fingerprint.

Cite this