Numerical Investigation of Ice Slurry Flow in a Horizontal Pipe

Rawat, K. S.; Pratihar, A.K.

doi:10.1088/1757-899x/310/1/012095

Cited by 17 publications

(10 citation statements)

References 19 publications

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“…e Figures 7-9 depict that given a constant inlet velocity, the local velocity value increases with the increase in ice particle size towards the centre of the pipe. In addition, the velocity distribution becomes increasingly homogeneous as the inlet velocity increases when the volume fraction of ice is constant [43]. Furthermore, no difference is observed in the velocity distribution between the solid and liquid phases of all cases.…”

Section: Pressure Dropmentioning

confidence: 83%

“…For instance, at a constant velocity of 0.1796 m/s, the pressure drop increases by an average of 2%, 3%, and 4% for each additional 5% of ice concentration as the particle size increases from 0.1 mm to 1.2 mm; the increment at an ice concentration of 5% is 1% (Figures 5(a)-5(d)). e reason for this phenomenon is that the addition of more ice particles, i.e., increasing ice mass fraction, results in an increased viscosity of ice slurry, which alters the density of the mixture as well as the number of Reynolds (results in decrease of the number of Reynolds, which leads to the accumulation of ice particles in the walls, and raises the potential of ice blockage, which increases resistance to flow) [15,43]. is affects the safe transport of ice slurry in pipes at high ice concentrations.…”

Section: Pressure Dropmentioning

confidence: 99%

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Numerical Investigation of the Pressure Drop Characteristics of Isothermal Ice Slurry Flow under Variable Ice Particle Diameter

Akhtar

Cheema

Ali

et al. 2020

Journal of Chemistry

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Ice slurry is an advanced secondary refrigerant that has been attracting considerable attention for the past decade due to the growing concerns regarding energy shortage and environmental protection. To stimulate the potential applications of ice slurry, the corresponding pressure drop of this refrigerant must be comprehensively investigated. The flow of ice slurry is a complex phenomenon that is affected by various parameters, including flow velocity, ice particle size, and ice mass fraction. To predict the pressure drop of ice slurry flow in pipes, a mixture computational fluid dynamic model was adopted to simulate a two-phase flow without considering ice melting. The numerical calculations were performed on a wide range of six ice particle sizes (0.1, 0.3, 0.5, 0.75, 1, and 1.2 mm) and ice mass fraction ranging within 5%–20% in the laminar range of ice slurry flow. The numerical model was validated using experimental data. Results showed that the ice volumetric loading and flow velocity have a direct effect on pressure drop; it increases with the increase in volumetric concentration and flow velocity. The findings also confirmed that for constant ice mass fraction and flow velocity, the pressure drop is directly and inversely related to the particle and pipe diameters, respectively. Moreover, the rise in pressure drop is more significant for large ice particle diameter in comparison to smaller size ice particles at high values of ice concentration and flow velocity.

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Section: Pressure Dropmentioning

confidence: 83%

Section: Pressure Dropmentioning

confidence: 99%

Numerical Investigation of the Pressure Drop Characteristics of Isothermal Ice Slurry Flow under Variable Ice Particle Diameter

Akhtar

Cheema

Ali

et al. 2020

Journal of Chemistry

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“…Moreover, it is noted in Figure 6a,b, that in the low-velocity region, the experimental values of pressure drop increases faster than the numerical predictions. This can be well explained by the fact that that when ice slurry flows in a low-velocity region, the pressure drop increases due to the increase in ice particles buoyancy, which results an increased friction among the ice particles and the pipe wall [35,49]. Like thermal fields, the VOF models provide a slightly higher values of pressure drop, whereas the predictions of the mixture model are lowest.…”

Section: Isothermal Ice Slurry Flowmentioning

confidence: 99%

“…For homogeneous flow, the Eulerian-Eulerian model accurately predicted the flow field at high inlet velocities. 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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“…Rawat and Pathikar [88] also used Eulerian approach to model the isothermal ethanol-based ice slurry flow in a horizontal straight pipe. They reported that with an increase in particle diameter ice slurry flow becomes more heterogeneous.…”

Section: Single-phase Approachmentioning

confidence: 99%

Numerical and experimental investigations of thermo-hydrodynamic characteristics of ice slurry in helical heat exchangers

Kamyar¹

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Contributions by others to the thesis No contributions by others Statement of parts of the thesis submitted to qualify for the award of another degree No works submitted towards another degree have been included in this thesis Research Involving Human or Animal Subjects No animal or human subjects were involved in this research vi solidus solid phase condition sw solid-wall interaction u=0 static ice slurry w wall

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Numerical Investigation of Ice Slurry Flow in a Horizontal Pipe

Cited by 17 publications

References 19 publications

Numerical Investigation of the Pressure Drop Characteristics of Isothermal Ice Slurry Flow under Variable Ice Particle Diameter

Numerical Investigation of the Pressure Drop Characteristics of Isothermal Ice Slurry Flow under Variable Ice Particle Diameter

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

Numerical and experimental investigations of thermo-hydrodynamic characteristics of ice slurry in helical heat exchangers

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