Investigation on effect of drag models on flow behavior of power-law fluid–solid two-phase flow in fluidized bed--颗粒学报PARTICUOLOGY

Yuan, Z., Wang, S., Shao, B., Xie, L., Chen, Y., & Ma, Y. (2022). Investigation on effect of drag models on flow behavior of power-law fluid–solid two-phase flow in fluidized bed. Particuology, 70, 43-54. https://doi.org/10.1016/j.partic.2022.01.008

Investigation on effect of drag models on flow behavior of power-law fluid–solid two-phase flow in fluidized bed

Zihan Yuan, Shuyan Wang ^*, Baoli Shao, Lei Xie, Yujia Chen, Yimei Ma

Key Laboratory of Enhanced Oil Recovery of Ministry of Education, School of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China

10.1016/j.partic.2022.01.008

Volume 70, November 2022, Pages 43-54

Received 5 September 2021, Revised 20 December 2021, Accepted 5 January 2022, Available online 19 January 2022, Version of Record 31 January 2022.

E-mail: wangshuyan@nepu.edu.cn

Highlights

• Based on rheology and pressure drop, power-law liquid–solid drag models are derived.

• Power-law liquid–solid drag models have a better agreement with experiments.

• Classic core-annulus flow structure of particles is captured.

• Increasing consistency coefficient and flow behavior index, drag coefficient decreases.

Abstract

In this study, a Eulerian-Eulerian two-fluid model combined with the kinetic theory of granular flow is adopted to simulate power-law fluid–solid two-phase flow in the fluidized bed. Two new power-law liquid–solid drag models are proposed based on the rheological equation of power-law fluid and pressure drop. One called model A is a modified drag model considering tortuosity of flow channel and ratio of the throat to pore, and the other called model B is a blending drag model combining drag coefficients of high and low particle concentrations. Predictions are compared with experimental data measured by Lali et al., where the computed porosities from model B are closer to the measured data than other models. Furthermore, the predicted pressure drop rises as liquid velocity increases, while it decreases with the increase of particle size. Simulation results indicate that the increases of consistency coefficient and flow behavior index lead to the decrease of drag coefficient, and particle concentration, granular temperature, granular pressure, and granular viscosity go down accordingly.

Graphical abstract

Keywords

Power-law liquid–solid drag models; Power-law fluid; Liquid–solid two-phase flow; Eulerian-Eulerian two-fluid model

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