A Study on Pressure drop of Plug Flow of Coarse Particles in a Horizontal Pipe

Plug flow of coarse particles was investigated experimentally in a horizontal pipe, in which a sub-pipe for secondary air injection was installed. Measurements were made about the plug motion, pressure drop, and transportation properties, and the roles of the main and sub-pipe air flow were clarified. The main air flow increases the number of plugs, while the sub-pipe air flow increases the plug velocity. The higher the main pipe air flow rate, the more regular the motion. The height of a stationary layer of deposited particles, which is built on the bottom of the main pipe, decreases with increasing the sub-pipe air flow rate. The pressure drop in the moving plug is quantitatively much smaller than that in the stationary packed bed of same particles.

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Plug Velocity and Pressure Drop of Plug Flow Pneumatic Conveying for Coarse Particles in a Vertical Pipe

The Proceedings of Conference of Tohoku Branch ◽

10.1299/jsmeth.2003.38.20 ◽

2003 ◽

Vol 2003.38 (0) ◽

pp. 20-21

Author(s):

Shigemitu KAMATA ◽

Mitsuaki OCHI ◽

Masahiro TAKEI ◽

Kenji KOFU

Keyword(s):

Pressure Drop ◽

Plug Flow ◽

Coarse Particles ◽

Pneumatic Conveying ◽

Vertical Pipe

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G1005 A Basic Study on Pressure Drop of Plug Flow of Coarse Particles

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2005.330 ◽

2005 ◽

Vol 2005 (0) ◽

pp. 330

Author(s):

Makoto TADOKORO ◽

Mitsuaki OCHI ◽

Masahiro TAKEI ◽

Kenji KOFU

Keyword(s):

Pressure Drop ◽

Plug Flow ◽

Coarse Particles ◽

Basic Study

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Plug Velocity of Plug Flow of Coarse Particles in a Horizontal Pipe : 1st Report : Modification of Quadratic Theoretical Equation for Konrad

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2002.8.137 ◽

2002 ◽

Vol 2002.8 (0) ◽

pp. 137-138

Author(s):

Yasuyuki EBE ◽

Mitsuaki OCHI ◽

Kenji KOFU ◽

Masahiro TAKEI

Keyword(s):

Plug Flow ◽

Theoretical Equation ◽

Coarse Particles ◽

Horizontal Pipe

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Numerical Simulation of the Fluid-Solid Two-Phase in the Horizontal Pipe Based on DEM-CFD Coupling Method

Volume 5A: Pipelines, Risers, and Subsea Systems ◽

10.1115/omae2019-95455 ◽

2019 ◽

Author(s):

Jin-Shan Pu ◽

Yong-Ping Chen ◽

Peng Yao

Keyword(s):

Pressure Drop ◽

Coarse Particles ◽

Two Phase ◽

Mean Velocity ◽

Horizontal Pipe ◽

Wall Functions ◽

Fluid Media ◽

Wall Zone ◽

Cfd Method ◽

Solid Liquid

Abstract Compared to the conventional CFD method, the CFD–DEM coupling is proposed to simulate the solid–liquid two–phase flow in the horizontal pipe in this paper. The standard k–ε model was utilized for fluid turbulent flow, the standard wall functions for near-wall zone treatment, and the Hertz–Mindlin (no slip) model for particle–particle and particle–wall contact. The movements and distribution of particles in different inlet velocities and pressure drop in pipeline are investigated in this paper. The results show that the coarse particles appear starting, discontinuous movement as bedload, continuous movement as bedload, and suspension in order with mean velocity of fluid media increase; with the increasing inlet velocity, the distribution of partilces in the pipe becomes more even, however, the concentration of the particles on the botton is larger than that on the top. Moreover, the pressure drop predicted by this method is compared with the Churchill pressure drop model and results are not identical. Therefore, the regular of pressure drop is demonstrated in this paper.

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