CFD simulation of the unsteady flow of a single coal log in a pipe

Li, Wenjuan; Lu, Shengyong; Liu, Yong; Wang, Rupei; Huang, Qunxing; Jin, Yan

doi:10.1002/cjce.22312

Cited by 11 publications

(9 citation statements)

References 28 publications

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“…Borregales et al [19] investigated the pigging process inside pipeline through two-dimensional transient CFD simulations, and found that sliding at constant velocity allows pig to move easily inside a straight pipe. Li et al performed unsteady turbulent flow CFD simulations of a single coal log by using a dynamic mesh method in [20]. In this paper, CFD modelling will be carried out for optimizing capsule shape (e.g.…”

Section: • Optimization Focuses On the Choice Of The Excitation Parammentioning

confidence: 99%

Optimization of the Vibro-Impact Capsule System

Liu

Islam

Pavlovskaia

et al. 2016

SV-JME

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Optimization of the vibro-impact capsule system for the best progression is considered in this paper focusing on the choice of the excitation parameters and the shape of the capsule. Firstly, the fastest and the most efficient progressions are obtained through experimental investigations on a novel test bed. Control parameters, the amplitude and the frequency of harmonic excitation, and one of the system parameter, namely the stiffness ratio, are optimized. The experimental results confirm that the control parameters for the fastest progression are not the same as those for the most efficient progression from the energy consumption point of view. Therefore, the capsule system can be controlled either in a speedy mode or in an energy-saving mode depending on the operational requirements. In the second part of the paper, optimization of the capsule shape is studied using computational fluid dynamics (CFD) simulations. Here the aim of achieving the best progression is addressed through minimizing the drag and the lift forces acting on a stationary capsule positioned in the pipe within a fluid flow. The CFD results indicate that both drag and lift forces are dependent on capsule and arc lengths, and finally, an optimized shape of the capsule is obtained.

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Section: • Optimization Focuses On the Choice Of The Excitation Parammentioning

confidence: 99%

Optimization of the Vibro-Impact Capsule System

Liu

Islam

Pavlovskaia

et al. 2016

SV-JME

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show abstract

“…The alteration of internal flow behaviour due to bluff body intrusion is scrutinised by Venugopal et al [24] and Kumar et al [25]. Further results on pressure drop due to a moving blockage was reported too by Li et al [26]. ABSTRACT -Piping serves as an important pillar in most of the engineering applications while the quantification on the pressure drop due to various factors is always the central issue of efficient piping maintenance and design.…”

Section: Introductionmentioning

confidence: 99%

Pressure Drop of Partially Blocked Hagen-Poiseuille Flow using CFD Simulation

Tantaro

Wah

Yuen

2020

IJAME

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Piping serves as an important pillar in most of the engineering applications while the quantification on the pressure drop due to various factors is always the central issue of efficient piping maintenance and design. In this study, the relationship between the pressure drop and the percentage of blockage in Hagen-Poiseuille flow is investigated. The analysis is executed using CFD commercial software of ANSYS Fluent. Our simulation discovered that the pressure drop will increase in an exponential manner with respect to constant increment of the blockage percentage. In other words, the power waste will increase exponentially too when the clot accumulates.

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“…In this technique, coal powder was first compacted into coal logs, followed by transporting the coal logs by pipe over great distances. 4,5 Liu et al and others experimentally investigated hydrodynamics, the design of transportation pipelines, coal log manufacturing, wear of coal logs, and the effect of polymer additives. [6][7][8][9] However, in coal log pipeline hydraulic transportation, coal powder needs to be molded or extruded into waterresistant and wear-resistant cylindrical coal log before being transported and coal log needs to be processed into coal powder after being transported, thus increasing the transportation cost.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the wheeled capsule motion inside hydraulic pipeline

Sun

Zhang

2019

Advances in Mechanical Engineering

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The wheeled capsule hydraulic transportation is a new technique for transporting materials. In this technique, the wheeled capsule, which is designed to contain materials, is one of the core components. In this study, a new type of wheeled capsule structure was first designed, and then experiments were conducted at seven water discharges, eight wheeled capsule dimensions, and eight mass of transporting materials in the pipe with an inner diameter of 100 mm. The pipe in study was divided into nine parts, and the speed of the wheeled capsule in each pipeline section was analyzed. The results showed that the speeds of the wheeled capsules in different sections of the pipeline did not change significantly and basically fluctuate near the overall average speed and the maximum relative fluctuation value was ł 8.6%. Therefore, the overall average speed of the wheeled capsule can be used to analyze the motion characteristics of the wheeled capsule. The average speed of the wheeled capsule increased with increasing water discharge, diminished with increasing mass of transporting materials, increased with increasing length of the wheeled capsule, and increased with increasing diameter of the wheeled capsule. The empirical formula of the average speed of the wheeled capsule with different water discharges, wheeled capsule dimensions and mass of transporting materials was obtained by the nonlinear regression method and can be expressed as v = 0:011 0:001dL=4L + d ð Þ 0:5686 (Q=0:9pDy) 0:4606 (0:001M) À0:1646 À 2:7740. The empirical formula was experimentally validated. The maximum relative error did not exceed 7.05%, proving that the empirical formula of the average speed of the wheeled capsule was rational. The results of this study can provide a theoretical basis for designing the structure of the wheeled capsule.

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CFD simulation of the unsteady flow of a single coal log in a pipe

Cited by 11 publications

References 28 publications

Optimization of the Vibro-Impact Capsule System

Optimization of the Vibro-Impact Capsule System

Pressure Drop of Partially Blocked Hagen-Poiseuille Flow using CFD Simulation

Experimental study of the wheeled capsule motion inside hydraulic pipeline

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