Experimental analysis of particle velocity and acceleration in vertical dilute phase pneumatic conveying

Tripathi, Naveen Mani; Santo, Nir; Kalman, Haim; Levy, Avi

doi:10.1016/j.powtec.2018.02.017

Cited by 32 publications

(10 citation statements)

References 27 publications

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“…Results obtained from the report by Tripathi et al. 9 demonstrate that when a negligible number of collisions are in a flow system, even the distribution of particle velocity along the radial direction of a pipe does not get affected. Among all these researches, a significant number of studies are focused on dilute phase systems only in vertical transport lines.…”

Section: Introductionmentioning

confidence: 96%

“…Numerous literature reviews [3][4][5][6][7][8] reveal several significant types of investigations on hydrodynamics or flow behavior of gas-solid phase in either horizontal or vertical pneumatic transport system. Results obtained from the report by Tripathi et al [9] demonstrate that when a negligible number of collisions are in a flow system, even the distribution of particle velocity along the radial direction of a pipe does not get affected. Among all these researches, a significant number of studies are focused on dilute phase systems only in vertical transport lines.…”

Section: Introductionmentioning

confidence: 96%

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Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡

et al. 2022

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Experimental and theoretical investigations on hydrodynamics for gas‐solid particles flow were carried out in a vertical upward converging pneumatic conveying system. One‐dimensional mathematical modeling and simulation were done using the FORTRAN‐95 program. The influence of convergence geometry on the hydrodynamic parameters like particle velocity, gas‐particle slip velocity, pressure drop, and particle Reynolds number (Rep) along the riser were studied. Experiments were conducted using the dilute phase mode with three types of granular cereal seeds of different sizes. Some significant differences in all hydrodynamic parameter profiles along the riser were observed between converging and uniform risers. Enhancement of Rep in the converging riser implies a higher gas‐solid transfer coefficient.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡

et al. 2022

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“…Pneumatic dryers are a conventional drying method that offers the benefits of a simple structure and low cost, making them widely used in various industrial applications. , Previous studies have shown that gas and particle flow rates have a significant impact on the performance of pneumatic dryers, particularly when used as a predryer in a PVC suspension production line . Researchers have also developed dimensionless correlations to describe particle velocity and acceleration length in pneumatic conveying . The effects of inlet air velocity, particle size, solid mass flow rate, and inlet air temperature on the drying performance of oil shale particles have been investigated to develop a model, which describes the oil shale pneumatic drying process .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Jiao

Wang

Mei

et al. 2023

Ind. Eng. Chem. Res.

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As an essential resource, the drying, upgrading, and efficient utilization of lignite are of great significance to the development of the low-carbon economy. In this work, a novel drying system, combining a pneumatic and spouted bed, is designed to achieve lignite deeply dewatering. The system is investigated experimentally and numerical simulated to characterize the hydrodynamics of particles moving across the domain, such as pressure drop, fountain height, and pressure fluctuation. The results show that there is a critical gas velocity that changes the flow pattern of the bed when the static bed is higher than 50 mm. When the gas velocity increases to the critical value, the spouting state becomes unstable and the corresponding pressure drop will undergo a secondary mutation. This work provides a deeper understanding of the flow structure and particle motion in the novel drying system under various industrial operating conditions.

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“…Zheng et al used PIV to obtain the particle fluctuation velocities near minimum conveying velocity in a horizontal conveying pipe with soft fins, and further revealed multiscale characteristics of particle fluctuation velocities. Santo Nir et al comprehensively analyzed particle motion during acceleration and steady state in a horizontal and vertical pipes using high‐speed photography.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms

et al. 2019

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This work investigated the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms. Results showed that the pressure drop increased first and then decreased with the increasing inclination angle at the same mass flux and superficial gas velocity. The changing trend of minimum conveying velocity (u min) and the pressure drop near it can be divided into two types by taking 45 as the boundary, which was consistent with the difference in flow regimes near u min at different inclination angles based on results of high-speed photography and acoustic emission detection. Furthermore, the pressure drop was decomposed to investigate the underlying mechanism of the changing trend of u min. Results showed that the changing trend of u min was closely related to the particle velocity and the particle velocity obtained by high-speed photography was in good agreement with the theoretical analysis. K E Y W O R D S inclined pneumatic conveying, minimum conveying velocity (u min), particle motion characteristic, pressure drop

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Experimental analysis of particle velocity and acceleration in vertical dilute phase pneumatic conveying

Cited by 32 publications

References 27 publications

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Experimental study of the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms

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Experimental analysis of particle velocity and acceleration in vertical dilute phase pneumatic conveying

Cited by 32 publications

References 27 publications

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube‡

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube‡

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Experimental study of the effect of inclination angle on the minimum conveying velocity and the underlying mechanisms

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Product

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Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡

Hydrodynamic Studies during Gas‐Solid Conveying in a Vertically Upward Converging Riser Tube^‡