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Influence of Longitudinal Vortex Generator Configuration on the Hydrodynamics in a Novel Spouted Bed
Author(s) -
Wu Feng,
Huang Zhenyu,
Zhang Jiejie,
Zhou Wenjing,
Ma Xiaoxun
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800048
Subject(s) - mechanics , vortex , radius , kinetic energy , turbulence , particle (ecology) , range (aeronautics) , flow (mathematics) , phase (matter) , two phase flow , materials science , physics , classical mechanics , geology , composite material , oceanography , computer security , quantum mechanics , computer science
The gas‐solid flow in a cylindrical spouted bed with a pair of spherical longitudinal vortex generators (LVGs) was numerically investigated by a two‐fluid model with kinetic theory for granular flow. Simulations and analyses were conducted on five types of spouted beds: a conventional spouted bed without disturbance units as well as spouted beds with a pair of LVGs in which the radius of spheres installed on the LVGs had four different dimensions. Results of the computational fluid dynamics demonstrate that the fountain height decreases with larger radius, and the influence range of the longitudinal vortex increases with the greater radius, both for the gas phase and particle phase. The turbulent kinetic energy of the gas phase along the radial and axial directions in the spouted bed was also promoted significantly by the longitudinal vortex and increased with larger radius, which is due to the higher LVG volume.