Plug Velocity of Plug Flow of Coarse Particles in a Horizontal Pipe : 2nd Report : Cubic Equation

2002 ◽  
Vol 2002.8 (0) ◽  
pp. 139-140
Author(s):  
Kenji KOFU ◽  
Mitsuaki OCHI ◽  
Yasuyuki EBE ◽  
Masahiro TAKEI
Keyword(s):  
Plug Flow ◽  
Coarse Particles ◽  
Horizontal Pipe ◽  
Cubic Equation

Plug Flow of Coarse Particles in a Horizontal Pipe

1982 ◽  
Vol 104 (2) ◽  
pp. 198-206 ◽  
Author(s):  
Y. Tsuji ◽  
Y. Morikawa
Keyword(s):  
Pressure Drop ◽  
Flow Rate ◽  
Air Flow ◽  
Plug Flow ◽  
Packed Bed ◽  
Coarse Particles ◽  
Air Flow Rate ◽  
Horizontal Pipe ◽  
Main Pipe ◽  
Secondary Air

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.

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

2004 ◽  
Vol 2004.2 (0) ◽  
pp. 427-428
Author(s):  
Daisuke YAMAMOTO ◽  
Mitsuaki OCHI ◽  
Masahiro TAKEI ◽  
Yoshihiro TANIGUCHI
Keyword(s):  
Pressure Drop ◽  
Plug Flow ◽  
Coarse Particles ◽  
Horizontal Pipe

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

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

Holdup Measurements of Aqueous Foam Flows and Flow Regime Characterization through Image Processing

2021 ◽  
pp. 1-9
Author(s):  
I. M. Carraretto ◽  
D. Pari ◽  
D. Fasani ◽  
A. Lucchini ◽  
M. G. Guilizzoni ◽  
...  
Keyword(s):  
Flow Regime ◽  
Oil And Gas ◽  
Plug Flow ◽  
Flow Region ◽  
Oil And Gas Industry ◽  
Liquid Holdup ◽  
Liquid Loading ◽  
Horizontal Pipe ◽  
Drift Flux Model ◽  
Aqueous Foam

Summary One of the most critical issues in the oil and gas industry is the dewatering of the pipelines used for natural gas transportation, and foam injection seems to be a prominent solution. This work has two goals: The main one concerns the development of an optical tool to measure the liquid holdup in foamy flows and perform the flow regime characterization, whereas the secondary goal is to quantify the effectiveness of surfactant injection in reducing the liquid loading. In this paper, we present the results of an experimental campaign aimed at the characterization of gas-liquid-foam flows in a horizontal pipe. Initially, liquid loading measurements for gas and liquid superficial velocities, ranging from 0.41 to 2.30 m/s and from 0.03 to 0.06 m/s, respectively, were performed by means of a specifically developed optical method. For each liquid superficial velocity, the minimum liquid holdup was found to lie in the proximity of the boundary between plug and stratified flow regime, with a superficial gas velocity between 0.44 and 0.90 m/s. Hence, the plug flow region corresponds to the best operating condition to perform the pipeline dewatering procedure. Moreover, the drift-flux model usually adopted for ordinary two-phasegas-liquid flows seems to fit well with the measured values of void fraction.

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

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

Development of Prediction Technology of Two-Phase Flow Dynamics Under Earthquake Acceleration — (4) Measurement of Bubble Deformation Near Wall Under Flow Rate Fluctuation

2012 ◽  
Author(s):  
Satoshi Okachi ◽  
Masaki Seto ◽  
Hideaki Monji ◽  
Akiko Kaneko ◽  
Yutaka Abe ◽  
...  
Keyword(s):  
Flow Rate ◽  
Two Phase Flow ◽  
Pipe Wall ◽  
Flow Behavior ◽  
Plug Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Bubble Deformation ◽  
Rate Fluctuation

In order to clear the two-phase flow behavior under earthquake, a systematic study is done experimentally and numerically. The present study is one on the series of the study on two-phase flow under earthquake, and focuses on the flow rate fluctuation. The flow rate fluctuation was added to bubbly or plug flow in a horizontal pipe, and flow behavior was measured by PIV and image processing. The bubble deformation near the pipe wall was observed and the velocity field around the bubble was shown. The bubble coalescence was also observed under the flow rate fluctuation condition.

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