Investigation on flow characteristics of ice slurry in horizontal 90° elbow pipe by a CFD-PBM coupled model

Cai, Lingling; Liu, Zhiqiang; Mi, Sha; Luo, Chun; Ma, Kebo; Xu, Aixiang; Yang, Sheng

doi:10.1016/j.apt.2019.07.010

Cited by 27 publications

(4 citation statements)

References 56 publications

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“…In addition, studies investigated ice slurry pressure drop characteristics under different operating conditions, which include variable ice particle diameter, ice slurry concentration, and velocity . Moreover, a CFD-PBM coupled model is employed to reveal the influence of ice particle kinetics on ice particle size distribution (PSD) in horizontal 90° elbow pipe . Similarly, studies on ice slurry pressure drop in different pipeline structures ,,, also provide methods for avoiding accumulation and stratification of ice slurries, which can guide the safety design and operation of ice pigging.…”

Section: Mechanism Of Ice Piggingmentioning

confidence: 99%

“…Moreover, a CFD-PBM coupled model is employed to reveal the influence of ice particle kinetics on ice particle size distribution (PSD) in horizontal 90° elbow pipe . Similarly, studies on ice slurry pressure drop in different pipeline structures ,,, also provide methods for avoiding accumulation and stratification of ice slurries, which can guide the safety design and operation of ice pigging.…”

Section: Mechanism Of Ice Piggingmentioning

confidence: 99%

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Review of Ice Slurry Pigging Techniques for the Water Supply Industry: Engineering Design and Application

Huang

Dong

et al. 2022

ACS EST Eng.

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It has been established that treated water can be easily impacted when delivered through drinking water distribution systems (DWDS), with issues such as discoloration, metal ion release, and bacterial regrowth. As part of good practice, water companies should take reasonable steps to prevent contamination from DWDS. Because traditional maintenance strategies have limitations, ice pigging can be employed as a powerful pipeline cleaning technique with the advantages of high cleaning efficiency, environmentally friendliness, not sticking, and cost effectiveness in some scenarios. This study aims to provide a review of the state-of-the-art techniques of ice pigging for the water supply industry. After providing the mechanism of ice pigging, the generation and storage of ice slurries and ice fraction measurement were investigated. The critical aspects during the ice pigging process concerning the flow pattern, pressure drop, and survival distance of ice slurries were also discussed. In addition, this critical review integrated scattered knowledge on engineering design to improve the performance of ice pigging. Three important factors in practical engineering include ice slurry flow velocity, ice fraction, and ice pig length. Finally, informed by in-depth analysis of suitable applications and underlying mechanisms, ice pigging is expected to further enhance fouling removal capacity and enable better water quality, reduced service interruptions, and have fewer customer complaints.

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Section: Mechanism Of Ice Piggingmentioning

confidence: 99%

Section: Mechanism Of Ice Piggingmentioning

confidence: 99%

Review of Ice Slurry Pigging Techniques for the Water Supply Industry: Engineering Design and Application

Huang

Dong

et al. 2022

ACS EST Eng.

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“…The purpose of CFD−PBM is to provide a more accurate and comprehensive understanding of fluid and particle behavior in various applications. Cai et al 17 developed a model to represent an ice slurry pipeline transport in an elbow pipe by a CFD−PBM approach based on E−E TFM. The CFD−PBM model included an evaluation of both particle aggregation and fragmentation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Sontti,

Zhang

2023

Ind. Eng. Chem. Res.

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Pipeline transportation is a vital method for conveying crushed oil sand ores and tailings in the oil sands industry. This study focuses on enhancing economic benefits by exploring the separation of valuable bitumen residues from coarse sand tailings within hydrotransport pipelines. Employing threedimensional transient Eulerian−Eulerian computational fluid dynamics (CFD) simulations coupled with a population balance model (PBM), we examine the aggregation and breakage of bitumen droplets under various flow conditions. The accuracy of the CFD−PBM model is validated against field measurements of velocity profiles and pressure drops. Our findings reveal that higher slurry velocities lead to intensified particle−bitumen interactions, resulting in reduced aggregated bitumen droplet sizes at the pipeline's core. Additionally, variations in bitumen fraction cause shifts in the distribution of coarse particles along the pipe's vertical axis with increased aggregation and larger droplets in the upper region. Notably, we demonstrate that smaller bubbles promote a more uniform distribution of bitumen compared with larger bubbles. These insights provide valuable knowledge for optimizing bitumen recovery processes and facilitate the integration of pipeline hydrotransport dynamics with downstream separation and extraction units.

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“…However, the collision near the wall was pronounced for particles with a large diameter [35]. Wang et al [32] also used the Eulerian-Eulerian model to evaluate the flow characteristics of ice slurry in various shapes of pipes, such as vertical, horizontal, and 90-degree elbow pipes [36,37].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Fluidic Characteristics of Two-Phase Ice Slurry Flows Based on Comparative Numerical Methods

2019

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Ice slurry is a potential secondary refrigerant for commercial refrigeration systems because of its remarkable thermal properties. It is necessary to optimize the heat transfer process of ice slurry to reduce the energy consumption of the refrigeration system. Thus, this study investigates the heat transfer performance of single-phase (aqueous solution) and two-phase (ice slurry) refrigerants in a straight horizontal tube. The numerical simulations for ice slurry were performed with ice mass fraction ranging from 5% to 20%. The effects of flow velocity and ice concentration on the heat transfer coefficient were examined. The results showed that heat transfer coefficient of ice slurry is considerably higher than those of single-phase flow, particularly at high flow velocity and ice content, where increase in heat transfer with a factor of two was observed. The present results confirmed that ice slurry heat transfer ability is considerably affected by flow velocity and ice concentration in laminar range. Moreover, the second part of this paper reports on the credibility three distinct two-phase Eulerian–Eulerian models (volume of fluid (VOF), mixture, and Eulerian) for the experimental conditions reported in the literature. All two-phase models accurately predict the thermal field at low ice mass fraction but underestimate that at high ice mass fractions. Regardless of the thermal discrepancies, the Eulerian–Eulerian models provide quite reasonable estimation of pressure drop with reference to experimental data. The numerical predictions from the VOF model are more accordant with the experimental results and the maximum percentage error is limited to ~20% and ~13% for thermal and pressure drop predictions, respectively.

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Investigation on flow characteristics of ice slurry in horizontal 90° elbow pipe by a CFD-PBM coupled model

Cited by 27 publications

References 56 publications

Review of Ice Slurry Pigging Techniques for the Water Supply Industry: Engineering Design and Application

Review of Ice Slurry Pigging Techniques for the Water Supply Industry: Engineering Design and Application

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Thermo-Fluidic Characteristics of Two-Phase Ice Slurry Flows Based on Comparative Numerical Methods

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