Effect of the Length and Diameter of a Cylindrical Capsule on the Pressure Drop in a Horizontal Pipeline

Asim, Taimoor; Mishra, Rakesh; Nearchou, Anastasios; Ubbi, Kuldip

doi:10.1088/1742-6596/364/1/012069

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…[3] Based on Fluent, Asim et al also obtained a numerical solution governing the turbulent flow around a concentric cylindrical capsule. [11] The geometries of the capsule models and pipes of these studies are listed in Table 1. These studies have offered valuable resources for studying coal log motion.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Khalil et al built a dynamic model of turbulent flow around a single long capsule situated in a concentric position using the commercial software FLUENT 6.3 by directly setting the capsule velocity . Based on Fluent, Asim et al also obtained a numerical solution governing the turbulent flow around a concentric cylindrical capsule . The geometries of the capsule models and pipes of these studies are listed in Table .…”

Section: Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

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

Liu

et al. 2015

Can J Chem Eng

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This study proposes a numerical simulation of the unsteady turbulent flow of a single coal log in a pipe using a dynamic mesh method. An eccentric two-dimensional dynamic model is developed in FLUENT 6.2. The model contains a straight section and a bent section. Comparisons of the coal log velocity and the pressure distributions of the pipe and the coal log surface are made between the calculated results and the experimental data. The shear force and the friction coefficient are also calculated to verify changes of the influence of water on the coal log. The results of this simulation display the dynamic motion of the coal log for startup and turning. Water drag force moves the coal log, making the coal log velocity greater than the water velocity. The lifting force lifts the coal log and moves its tail slightly upward. The pressure drop of the whole pipe is respectively larger in the presence of the coal log. The pressure along the coal log surface slowly declines. The appearance of a bend impedes the motion of the coal log and enhances abrasion. The coal log has difficulty being suspended due to decreased lifting force and increased friction. The pressure on the coal log surface rises.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

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

Liu

et al. 2015

Can J Chem Eng

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“…Using the results from the numerical simulations [4], a rigorous correlation has been developed for the pressure drop per unit length in cylindrical capsule carrying pipelines.…”

Section: Operational Costmentioning

confidence: 99%

Optimisation of a Horizontal Capsule Transporting Pipeline carrying Cylindrical Capsules

Asim

Mishra

Kollár

et al. 2012

J. Phys.: Conf. Ser.

Self Cite

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Pipelines carrying fluids and slurries are quite common. The third-generation pipelines carrying spherical or cylindrical capsules (hollow containers) filled with minerals or other materials including hazardous liquids are rather a new concept. These pipelines need to be designed optimally for commercial viability. An optimal design of such a pipeline results in minimum pressure drop in the pipeline. This corresponds to minimum head loss and hence minimum pumping power required to drive the capsules and the transporting fluid. This study uses a rigorous approach to predict pumping cost based on Computational Fluid Dynamics (CFD) and hence optimize the design of the capsule transporting pipelines. Pressure drop relationship developed has been incorporated to calculate the pumping requirements for the system. Based on the least-cost principle, a methodology has been developed for the determination of the optimal diameter of cylindrical capsule carrying hydraulic pipeline. This procedure can be applied to obtain the optimal size of the capsule pipeline for minimum pumping and capital costs.

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“…Latto and Chow [9] discussed the impact of different dimensions of annular gaps on the speed, front and rear pressure drop, and unit energy loss of the piped capsule. Asim et al [10][11][12] computed the pressure drop changes with different gap widths and lengths through CFD, as well as the distribution of flow fields in different types of pipe sections for different types of piped capsules.…”

Section: Introductionmentioning

confidence: 99%

The Dynamic Characteristics of a Piped Capsule Moving in a Straight Pipeline

Yang

et al. 2023

Water

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The hydraulic transportation of piped capsules is a new and energy-saving transportation mode, which is especially suitable for the long-distance and high-stability requirements of material transportation. In this paper, the COMSOL Multiphysics software was used to construct a mathematical model of the dynamic characteristics of a piped capsule moving in a straight pipeline, in which the boundary conditions were redeveloped, the inlet velocity distribution function was defined, and the physical experiment was carried out for verification. The dynamic characteristics were analyzed, and through the calculation of the energy consumption, the optimal piped capsule under the research conditions was obtained. The results show that the simulation results and experimental results for the piped capsule’s average moving velocity, axial velocity, and wall shear stress along the cylinder wall were basically consistent, with a maximum error of 14.22%, 2.62%, and 20.13%, respectively. With a decrease in the diameter-to-length ratio of the piped capsule, the axial velocity of the concentric annular gap flow decreased gradually. The area with a large shear stress was mainly concentrated at the front and rear ends of the cylinder wall, especially the rear area of the support feet of the piped capsule. With the increase in the diameter of the piped capsule, the wall shear stress of the capsule increased. Finally, the superior diameter-to-length ratio for the piped capsule under the research conditions was obtained and shown to be ε = 0.4. The research in this paper will provide a theoretical reference for the structural design and dynamic mechanism analysis of the piped capsule.

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Effect of the Length and Diameter of a Cylindrical Capsule on the Pressure Drop in a Horizontal Pipeline

Cited by 6 publications

References 4 publications

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

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

Optimisation of a Horizontal Capsule Transporting Pipeline carrying Cylindrical Capsules

The Dynamic Characteristics of a Piped Capsule Moving in a Straight Pipeline

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