Multi-scale analysis on particle dynamic of vertical curved 90° bend in a horizontal-vertical pneumatic conveying system

Tu, PanPan; Shao, Yuyao; Chen, Qunyan; Yan, Fei; Liu, Ping

doi:10.1016/j.apt.2021.07.002

Cited by 11 publications

(2 citation statements)

References 18 publications

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“…A qualitative comparison between blind T and radius bending was made with specific material properties. Tu et al [19] analyzed the pressure drop and particle velocity and clarified the macroscopic motion characteristics of particles under different bending-diameter ratios. Zhou et al [20] studied the effects of wall wear, particle breakage, and pressure drop on the elbow using an orthogonal experimental design.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Elbow Pressure Drop and Conveying Stability of Pneumatic Conveying for Stiff Shotcrete Based on Response Surface Methodology

Sun

et al. 2023

Processes

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The pressure drop and conveying stability caused by the bend significantly affect the pneumatic conveying process of stiff shotcrete, which is the key to solving the problem of long-distance transportation. In this paper, the effects of different air velocities (32 m/s, 36 m/s, 40 m/s), water-cement ratios (0.1, 0.2, and 0.3), and bending-diameter ratios (4, 12, and 20) on the pressure drop of the elbow R1 and conveying stability R2 are studied using the response surface method. The conveying stability is characterized by the pressure variation coefficient (C.V). The response surface graph aids in the intuitive analysis of the effects of these variables. The results show that the impact of air velocity on R1 and R2 is exceptionally significant, and the interaction of each factor on the response value is analyzed. The response value and the quadratic polynomial regression equation between the various factors are obtained in addition to the flow characteristics of stiff shotcrete under different working conditions. The relationship established by the statistical processing of the experimental results can provide some reference for specifying the pressure loss model of stiff shotcrete.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Elbow Pressure Drop and Conveying Stability of Pneumatic Conveying for Stiff Shotcrete Based on Response Surface Methodology

Sun

et al. 2023

Processes

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“…The results showed that the soft fins were effective in pipes with larger R/D. Yan et al (2021) and Tu et al (2021) studied the flow characteristics of particles in different curvature radius bends by using different analysis methods to dissect the flow pattern. Yilmaz and Levy (2001) investigated the particle velocity distribution downstream of the bend and discovered that the rope structure fragmented into big discontinuous clusters.…”

mentioning

confidence: 99%

Particle Dynamic Characteristics of the Vertical Tubes in a Horizontal-Vertical Pneumatic Conveying System with Different Curvature Radius Bends

Yan

Yang

et al. 2022

JAFM

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To examine the flow characteristics of particles in the vertical tube corresponding to different curvature radius bends, the particle velocity is measured at the Minimum Pressure Drop (MPD) using a high-speed Particle Image Velocimeter (PIV). This experiment explores the effects of particle flow characteristics at different curvature radius bends and their corresponding vertical tubes with pressure drop, power consumption, the intensity of particle fluctuation velocity, power spectrum and time-frequency characteristics. It is observed that the pressure drop and power consumption can be reduced with the help of a large curvature radius bend. Besides, the reduction of particle velocity in the large curvature radius bend and its corresponding vertical tube is less, and the particle possesses a larger intensity of fluctuation velocity in its corresponding vertical tube. The particles in the vertical tube corresponding to the large curvature radius bend lead to large peaks of the power spectrum in the low-frequency region, which is closely linked to the pressure drop. Eventually, the dynamics of particles in a vertical tube are revealed from the perspective of time-frequency analysis by using a continuous wavelet transform.

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Recent progress on the discrete element method simulations for powder transport systems: A review

Shi

Sakai

2022

Advanced Powder Technology

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Multi-scale analysis on particle dynamic of vertical curved 90° bend in a horizontal-vertical pneumatic conveying system

Cited by 11 publications

References 18 publications

An Experimental Study on the Elbow Pressure Drop and Conveying Stability of Pneumatic Conveying for Stiff Shotcrete Based on Response Surface Methodology

An Experimental Study on the Elbow Pressure Drop and Conveying Stability of Pneumatic Conveying for Stiff Shotcrete Based on Response Surface Methodology

Particle Dynamic Characteristics of the Vertical Tubes in a Horizontal-Vertical Pneumatic Conveying System with Different Curvature Radius Bends

Recent progress on the discrete element method simulations for powder transport systems: A review

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