Heat Transfer Measurements, Flow Pattern Maps, and Flow Visualization for Non-Boiling Two-Phase Flow in Horizontal and Slightly Inclined Pipe

Ghajar, Afshin J.; Tang, Clement C.

doi:10.1080/01457630701193906

Cited by 66 publications

(28 citation statements)

References 6 publications

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“…The experimental technique was based on infrared thermography of an electrically heated wall of the tube. Measurements of the average heat transfer coefficients at various locations along the pipe were carried out by Ghajar and Tang [6] for a wide range of Reynolds numbers and different flow patterns in horizontal and slightly upward inclined pipes. The effect of Reynolds numbers and inclination on the heat transfer parameters was discussed.…”

Section: Introductionmentioning

confidence: 99%

Local instantaneous heat transfer around a rising single Taylor bubble

Babin

Shemer

Barnea

2015

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Local instantaneous heat transfer around a rising single Taylor bubble

Babin

Shemer

Barnea

2015

International Journal of Heat and Mass Transfer

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“…Due to the density difference between gas and liquid, the liquid phase is much more affected by the orientation of pipe (inclination). The detailed discussion of the inclination effect on the two-phase heat transfer is available in Ghajar and Tang (2007). In order to account for the effect of inclination, Ghajar and Kim (2005) proposed the inclination factor…”

Section: A General Two-phase Heat Transfer Correlation For Various Flmentioning

confidence: 99%

“…The summary of the experimental conditions and measured heat transfer coefficients are tabulated in Table 8. Detailed discussions on the complete experimental results are documented by Ghajar and Tang (2007). Figures 11 and 12 provide an overview of the pronounced influence of the flow pattern, superficial liquid Reynolds number (water flow rate) and superficial gas Reynolds number (air flow rate) on the two-phase heat transfer coefficient in horizontal flow.…”

Section: Systematic Investigation On Twophase Gas-liquid Heat Transfementioning

confidence: 99%

Recent Developments in Non-Boiling Two-Phase Flow Heat Transfer and Void Fraction in Various Pipe Inclinations

Ghajar¹,

Tang²,

Guo³

et al. 2010

AIP Conference Proceedings

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The validity and limitations of the numerous two-phase non-boiling heat transfer correlations that have been published in the literature over the past 50 years are discussed. The extensive results of the recent developments in the non-boiling two-phase heat transfer in air-water flow in horizontal and inclined pipes conducted at Oklahoma State University's two-phase flow heat transfer laboratory are presented. Practical heat transfer correlations for a variety of gas-liquid flow patterns and pipe inclination angles are recommended. The application of these correlations in engineering practice, and how they can influence the equipment design and consequently the process design are discussed.

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“…The mean heat-transfer coefficients (h TP) for the two-phase flow were calculated experimentally as reported by reference [14]:…”

Section: Experiments Limitationmentioning

confidence: 99%

Simulation and Experimental of Oil-Water Flow with Effect of Heat Transfer in Horizontal Pipe

Abed¹

2014

IJMEA

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Abstract:There is a strong tendency for two immiscible fluids to arrange themselves so that the low viscosity constituent is in the region of high share. Therefore, it may be possible to introduce a beneficial effect in any flow of a very viscous liquid by introducing amount of a fluid lubricated as liquid-liquid oil-water flow. Two main classes of flows are seen, annular and small bubble in all experimental results. The pressure drop and mean heat-transfer coefficients were observed to depend strongly on the flow patterns. A correlation of the two-phase mean heat-transfer coefficients, based on a simple model of liquid flow, with a Reynolds number based on the actual mean velocity of the liquid mixture two-phase flow, were developed. An experimental rig facility has been designed and constructed, to enable measurements of local parameters in oil-water flow in the developing region of the flow in a 32 mm ID 6 m long pipe. The large discrepancies between model predictions and experimental data are reported in the literature review that the physics of oil-water flow is complex and not yet fully understood. The flow patterns that appear are classified in flow pattern maps as functions of either mixture velocity and water cut or superficial velocities. From these experiments a smaller number of annular flows are selected for studies of velocity and turbulence. The theoretical study was executed using software Fluent program, a modified turbulent diffusion model is presented. Simulation results carried out with the model show more physical predictions with respect to the particle deposition process and concentration profile. The theoretical results represent the pressure gradient distribution, velocity and mean heat transfer coefficient, pressure contours, velocity vectors, streamlines, and also velocity profiles. It was found that the methods with more restrictions (in terms of the applicable range of void fraction, liquid superficial Reynolds number) give better predictions.

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Heat Transfer Measurements, Flow Pattern Maps, and Flow Visualization for Non-Boiling Two-Phase Flow in Horizontal and Slightly Inclined Pipe

Cited by 66 publications

References 6 publications

Local instantaneous heat transfer around a rising single Taylor bubble

Local instantaneous heat transfer around a rising single Taylor bubble

Recent Developments in Non-Boiling Two-Phase Flow Heat Transfer and Void Fraction in Various Pipe Inclinations

Simulation and Experimental of Oil-Water Flow with Effect of Heat Transfer in Horizontal Pipe

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