Flow patterns of vertically upward and downward air-water two-phase flow in a narrow rectangular channel

Chalgeri, Vikrant Siddharudh; Jeong, Ji Hwan

doi:10.1016/j.ijheatmasstransfer.2018.09.047

Cited by 38 publications

(5 citation statements)

References 26 publications

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“…e experimental flow conditions of this study were plotted on the upward gas-liquid flow pattern map in a vertical narrow rectangular channel proposed by Chalgeri [9]. In this study, the superficial liquid velocity ranges from 0.1 to 0.3 m/s and superficial gas velocity from 30 to 66 m/s; it can be observed that the entire experiment corresponds to the annular flow condition in a vertical narrow rectangular channel.…”

Section: Experimental Procedurementioning

confidence: 95%

Studying Disturbance Wave Velocity and Wall Shear Stress of Vertical Upward Annular Flow in Narrow Rectangular Channel

Liu

Yan

Zhu

et al. 2021

Science and Technology of Nuclear Installations

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As two important parameters, the velocity of disturbance wave and the wall shear stress in annular flow are very important to solve the closed equations of the mechanical model for annular flow. In this study, the disturbance wave velocity and wall shear stress of annular flow in a vertical narrow rectangular channel with a cross section of 70 mm × 2 mm were studied. According to the experimental results, it is found that the wave velocity and wall shear stress of disturbance wave increase with increasing gas phase velocity and liquid phase velocity. Also, existing correlations for predicting the velocity of disturbance wave were summarized and evaluated using the current experimental data. A new correlation for wall shear stress based on the disturbance wave velocity has been proposed. Compared with the existing correlation for predicting wall shear stress, this new correlation can well predict the current experimental data and MAPE is only 7.32%.

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Section: Experimental Procedurementioning

confidence: 95%

Studying Disturbance Wave Velocity and Wall Shear Stress of Vertical Upward Annular Flow in Narrow Rectangular Channel

Liu

Yan

Zhu

et al. 2021

Science and Technology of Nuclear Installations

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“…Chalgeri and Jeong [19] conducted two-phase flow experiments and plotted flow pattern maps for the vertical upward and downward flows from the measured data sets. They utilized a high-speed camera to visualize the flows, while a void fraction analysis was carried out by means of the electrical impedance technique and digital image analysis.…”

Section: Gas-liquid Upward and Downward Flowsmentioning

confidence: 99%

Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?

et al. 2021

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Understanding the behaviour of gas–liquid flows in upward and downward pipe configurations in chemical, petroleum, and nuclear industries is vital when optimal design, operation, production, and safety are of paramount concern. Unfortunately, the information concerning the behaviour of such flows in large pipe diameters is rare. This article aims to bridge that gap by reporting air–water upward and downward flows in 127 mm internal diameter pipes using advanced conductance ring probes located at two measurement locations. The liquid and gas flow rates are 0.021 to 0.33 m/s and 3.52 to 16.1 m/s, correspondingly, covering churn and annular flows. To achieve the desired objectives, several parameters, probability density function (PDF), power spectral density (PSD), Slippage Number (SN), drift velocity (Ugd), and distribution coefficient (C0) were employed. The flow regimes encountered in the two pipe configurations were distinguished employing a flow regime map available in the literature and statistical analysis. The obtained results were supported by visual inspection. The comparison between the present study against reported studies reveals the same tendency for the measured experimental data. The Root Mean Square Error (RMSE) method within 4% was utilized in recommending the best void fraction prediction correlation for the downward and upward flows.

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“…Eldesoky et al [20] carried out an analytical investigation of particle suspension in a tube with wavy walls. Chalgeri et al [21] conducted an experimental study of two-phase flows in a channel with rectangular walls. Chamka et al [22] analyzed the suspension flow of hydromagnetic particles along a channel analytically.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study in Effect of Thermal Slip on Two Fluid Flow in a Vertical Channel

Cheruku,

Reddy

2023

TESEA

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The present study investigates the effect of thermal slip on an immiscible flow of micropolar and viscous fluids in a vertical channel. The left boundary is subjected to thermal slip with appropriate boundary and interface conditions, resulting in a linked system of nonlinear partial differential equations. The ND Solve technique in Mathematica software is used to implement the Runge-Kutta method of the sixth order. The velocity, temperature, and concentration equations are then calculated. The mass, heat, and velocity transmission rates at the boundaries were recorded for all the variations in the governing parameters. In addition, the impact of relevant parameters on various physical properties of micropolar and viscous fluids is analyzed through graphical means. The results are then discussed in detail. Thermal slip, Grashof number, molecular number, magnetic parameter, and Reynolds number are crucial factors that significantly affect heat and mass transfer in fluid flow. The effect of the increased thermal slip is noted to result in a decrease in both the velocity profile and temperature. It was also observed that higher values of Grashof and molecular Grashof numbers led to increased velocity and angular velocity.

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Flow patterns of vertically upward and downward air-water two-phase flow in a narrow rectangular channel

Cited by 38 publications

References 26 publications

Studying Disturbance Wave Velocity and Wall Shear Stress of Vertical Upward Annular Flow in Narrow Rectangular Channel

Studying Disturbance Wave Velocity and Wall Shear Stress of Vertical Upward Annular Flow in Narrow Rectangular Channel

Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?

Numerical Study in Effect of Thermal Slip on Two Fluid Flow in a Vertical Channel

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