Scaling laws for gas–solid riser flow through two-fluid model simulation--颗粒学报PARTICUOLOGY

Naren, P. R., & Ranade, V. V. (2011). Scaling laws for gas–solid riser flow through two-fluid model simulation. Particuology, 9(2), 121-129. https://doi.org/10.1016/j.partic.2010.09.010

Scaling laws for gas–solid riser flow through two-fluid model simulation

P.R. Naren ^{a b *}, Vivek.V. Ranade ^a

a CREST, National Chemical Laboratory, Pune 411008, India
b Chemical Engineering Department, Institute of Chemical Technology, Mumbai 400019, India

10.1016/j.partic.2010.09.010

Volume 9, Issue 2, April 2011, Pages 121-129

Received 15 January 2010, Revised 7 September 2010, Accepted 8 September 2010, Available online 19 January 2011.

E-mail: prnaren@gmail.com

Highlights

Abstract

Scale up of gas–solid circulating fluidized bed (CFB) risers poses many challenges to researchers. In this paper, CFD investigation of hydrodynamic scaling laws for gas–solid riser flow was attempted on the basis of two-fluid model simulations, in particular, the recently developed empirical scaling law of Qi, Zhu, and Huang (2008). A 3D computational model with periodic boundaries was used to perform numerical experiments and to study the effect of various system and operating parameters in hydrodynamic scaling of riser flow. The Qi scaling ratio was found to ensure similarity in global parameters like overall cross-sectional average solid holdup or pressure drop gradient. However, similarity in local flow profiles was not observed for all the test cases. The present work also highlighted the significance of error bars in reporting experimental values.

Graphical abstract

Keywords

Risers; Scaling; CFD; Periodic boundary; Two-fluid model; Error bar

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