New benchmark problems for validation and verification of incompressible multi-fluid flows based on the improved Volume-Of-Fluid (VOF) method

Garoosi, Faroogh; Mahdi, Tew‐Fik

doi:10.1016/j.colsurfa.2022.129313

Colloids and Surfaces A: Physicochemical and Engineering Aspect

2022

DOI: 10.1016/j.colsurfa.2022.129313

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New benchmark problems for validation and verification of incompressible multi-fluid flows based on the improved Volume-Of-Fluid (VOF) method

Faroogh Garoosi

Tew‐Fik Mahdi

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Cited by 7 publications

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“…Therefore, it is necessary to include CFD to determine local and global flow field characteristics. In the past 10 years, various CFD techniques, such as the volume of fluids (VOF), [31,32] the marker and cell (MAC), [33] and the moving grid, [34] have been proposed and developed. Among these techniques, the VOF method, which requires less storage information, can quickly and accurately identify the laminar flow interface, the wave interface, and even the interface of a broken liquid film.…”

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The velocity field characteristics of high‐viscosity fluids falling film flow down clamped channels

Wang

Chen

et al. 2023

Can J Chem Eng

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The complexity of falling film flow has been studied in many industrial applications. In this work, the velocity field of high-viscosity fluids falling film flow down clamped channels was investigated numerically and experimentally.The results show that the numerical simulation results are consistent with the experimental results, and the characteristics of the velocity field are related to the fluid properties, operating conditions, and structure of the clamped channels. When the fluid viscosity is greater than or equal to 10 Pa Á s, the type of velocity field changes into I shape, U shape, and V shape. While the fluid viscosity drops to 0.89 Pa Á s, the viscous force cannot resist the inertial force and gravity, resulting in a cardioid velocity field. By adjusting the structure of the clamped channels and operating conditions, the tension of the liquid film can be changed, and the velocity distribution of the liquid film can be manipulated.Significantly, under the fluctuating curtain flow, the liquid film coalesces and breaks frequently, which enlarges the surface area of the liquid film and strengthens the surface renewal frequency. Hence, this form of falling film flow can be applied to process intensification of high-viscosity materials.clamped channels, falling film flow, high-viscosity fluids, velocity field | INTRODUCTIONAs an energy-efficient process for intensifying heat and mass transfer, falling film flows have been widely used in chemical engineering, [1] refrigeration, [2] and seawater desalination. [3] Various flow patterns of falling film flows based on fluid properties, the geometric structure of the supporting wall, the working environment, and other factors have been described in the literature. Many reports found that the flow patterns of liquid film flow down vertical geometric structures could be categorized as drop-like flows, inertially driven flows, gravity-driven flows, solitary wave-like flows, and disturbance flows. [4][5][6][7] Liquid viscosities can vary from low (0.001$1 Pa Á s), [8,9] such as water, glycerin, and aqueous lithium bromide solution, to high (thousands of times higher than the viscosity of low-viscosity fluids), [10][11][12] such as silicone oil, syrup, and melt polymer. The hydrodynamic mechanism of the falling film is strongly dependent on fluid viscosity. The falling film flow of low-viscosity liquid quickly evolves into wave flow driven by inertial force and gravity, [13] while the primary flow pattern of highviscosity fluid is peristaltic laminar flow due to the sizeable viscous resistance. Additionally, specific operating conditions may cause irregular fluctuations in falling film Abbreviations: CFD, computational fluid dynamics; LDA, laser doppler analysis; VOF, volume of fluids.

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The velocity field characteristics of high‐viscosity fluids falling film flow down clamped channels

Wang

Chen

et al. 2023

Can J Chem Eng

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Sloshing damping assessment and structural dynamic analysis of perforated structures for heavy liquid metal under seismic excitation

Chen,

Ming,

et al. 2024

Annals of Nuclear Energy

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et al. 2023

Chemical Engineering Science

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New benchmark problems for validation and verification of incompressible multi-fluid flows based on the improved Volume-Of-Fluid (VOF) method

Cited by 7 publications

References 96 publications

The velocity field characteristics of high‐viscosity fluids falling film flow down clamped channels

The velocity field characteristics of high‐viscosity fluids falling film flow down clamped channels

Sloshing damping assessment and structural dynamic analysis of perforated structures for heavy liquid metal under seismic excitation

Bubble behavior, flow characteristics, and mass transfer enhancement in self-priming Venturi tubes

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