Two-dimensional transient numerical simulation of solids and gas flow in the riser section of a circulating fluidized bed

Autor:	Hamid Arastoopour, Sofiane Benyahia, T. M. Knowlton
Rok vydání:	2002
Předmět:	Mass flux Pressure drop Finite volume method Petroleum engineering business.industry Chemistry General Chemical Engineering General Chemistry Mechanics Computational fluid dynamics Physics::Fluid Dynamics Fluidized bed Wet gas Fluidized bed combustion Two-phase flow business
Zdroj:	Chemical Engineering Communications. 189:510-527
ISSN:	1563-5201 0098-6445
DOI:	10.1080/00986440212093
Popis:	A computational fluid dynamics software (CFX) was modified for gas/particle flow systems and used to predict the flow parameters in the riser section of a circulating fluidized bed (CFB). Fluid Catalytic Cracking (FCC) particles and air were used as the solids and gas phases, respectively. Two-dimensional, transient, isothermal flows were simulated for the continuous phase (air) and the dispersed phase (solid particles). Conservation equations of mass and momentum for each phase were solved using the finite volume numerical technique. Two-dimensional gas and particle flow profiles were obtained for the velocity, volume fraction, and pressure drop for each phase. Calculations showed that the inlet and exit conditions play a significant role in the overall mixing of the gas and particulate phases and in the establishment of the flow regime. The flow behavior was analyzed based on the different frequency of oscillations in the riser. Comparison of the calculated solids mass flux, solids density and pressure ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8cef00eb748fe9ed2a545c9f35992bce https://doi.org/10.1080/00986440212093 Zobrazit plný text záznamu Plný text ve formátu PDF