CFD Simulation and Optimization of Mixing Behaviors in a Spouted Bed with a Longitudinal Vortex

Wu, Feng; Bai, Jinhao; Zhang, Jiejie; Zhou, Wenjing; Ma, Xiaoxun

doi:10.1021/acsomega.9b00856

Cited by 8 publications

(2 citation statements)

References 40 publications

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“…When the jet diameter D = 4 mm, the number of jets is 24, and the nondimensional cross-sectional area of the air inlet is 0.67, the fluidization effect between fluids in the bed is optimal. In the case of spouted beds with LVGs, − the law of fluid flow is explored by changing the number of rows, spacing, and diameter of the spherical generators. The simulation showed that when the number of rows of the spherical generators was 3, the spacing was 10 mm, and the diameter was 28 mm, the turbulence effect of the particles was the strongest.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Three Novel Strengthening Components on Water Evaporation in 3D Spouted Beds

et al. 2021

Ind. Eng. Chem. Res.

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The hydrodynamics of the gas–solid two-phase flow and vaporization of the water phase in an integral multijet spout-fluidized bed (IMJSFB) and spouted beds with spherical longitudinal vortex generators (LVGs) and an integral swirling blade nozzle (ISBN) was numerically simulated. These three novel strengthening components are adopted for the strengthening of the radial mixing of particles, promoting the uniformity of the flow field velocity distribution, and increasing the water vaporization rate. The simulation results show that the three novel strengthening components can promote the uniformity of fluid flow velocity distribution in beds, and the promotion effect is arranged in descending order as follows: LVGs > swirling blades > multijet. In the case of water vaporization, the LVGs, swirling blade, and multijet mainly promote the vaporization of water near the generators, in the spout zone, and the zone near the side nozzles, respectively. Among them, the swirling blade contributes the most to water vaporization, followed by the multijet and then LVGs. In addition, when the gas inlet velocity and temperature are 11.2 m/s and 520 K, respectively, water vaporization is most obviously boosted.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Three Novel Strengthening Components on Water Evaporation in 3D Spouted Beds

et al. 2021

Ind. Eng. Chem. Res.

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“…Recently, the flow behavior of ultrafine powders in the spouted bed with coarse particles was numerically studied by Sun et al Zhang et al experimentally studied the gas–solid two-phase flow of silicon particles with a wide scale distribution in a draft tube spouted bed. Wu et al − studied flow behaviors of gas and particles in three kinds of spouted beds recently: without disturbance units, with a pair of balls and with a pair of longitudinal vortex generators (LVGs). The effect of LVGs’ row number on the hydrodynamic behaviors in the spouted bed is also numerically analyzed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Che

Huang

et al. 2020

ACS Omega

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The swirling flow technology is adopted on a nozzle of the spouted bed in order to enhance the radial movement of the particles. The hydrodynamic characteristics in a spouted bed with a swirling flow generator installed on the nozzle are numerically investigated based on the two-fluid model (TFM). The traditional spouted bed and spouted bed with an integral swirling blade nozzle (ISBN) are simulated and analyzed. Numerical results show that the dead zone at the cone region of the annulus can be effectively eliminated by using the ISBN. The maximum decrease in particle concentration near the cone region is 72%, and the ISBN structure can significantly improve the comprehensive fluidization degree of the spouted bed when γ equals 86°. The turbulent kinetic energy of gas can be significantly increased by the swirling flow along the radial direction in the spouted bed, especially in the spout region. Also, the swirling flow can promote the radial velocity and granular temperature of the particles in the spouted bed, which is helpful to the radial mixing of particles and gas phase between the central spout and the annulus in the spouted bed. There exists a value of ξ (equals 0.526), which brings the greatest elimination effect of the flow dead zone in the annulus of the limited spouted bed space, and the overall fluidization of the spouted bed has the best performance when ξ = 0.316.

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Numerical and experimental study of integral multi-jet structure impact on gas-solid flow in a 3D spout-fluidized bed

Yang

Che

et al. 2020

Chemical Engineering Journal

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CFD Simulation and Optimization of Mixing Behaviors in a Spouted Bed with a Longitudinal Vortex

Cited by 8 publications

References 40 publications

Numerical Study on the Effect of Three Novel Strengthening Components on Water Evaporation in 3D Spouted Beds

Numerical Study on the Effect of Three Novel Strengthening Components on Water Evaporation in 3D Spouted Beds

Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Numerical and experimental study of integral multi-jet structure impact on gas-solid flow in a 3D spout-fluidized bed

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