On the choice of correlations for calculating the heat transfer coefficient in binary gas mixtures

Dragunov, Yu. G.; Smetannikov, V. P.; Gabaraev, B. A.; Belyakov, M. S.; Kobzev, P. V.

doi:10.1134/s1810232813010050

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…Because previous studies were primarily based on straight pipes, the forward ex sion section of the entrance section of the Zig pipeline is compared with those of prev studies. Dragunov et al [36] conducted an experimental study on the Petukhov cor tion optimized by Sleicher and Rouse [37] and verified its reliability in predicting He- The local convective heat transfer coefficient at 0.2L of the experimental channel is lower than that at the mainstream for the undeveloped turbulent flow at the channel's entrance. The local convective heat transfer coefficient at the outlet of the channel is higher than that at the mainstream for the influence of the outlet.…”

Section: Geometry and Boundary Conditionsmentioning

confidence: 99%

“…Because previous studies were primarily based on straight pipes, the forward extension section of the entrance section of the Zig pipeline is compared with those of previous studies. Dragunov et al [36] conducted an experimental study on the Petukhov correlation optimized by Sleicher and Rouse [37] and verified its reliability in predicting He-Xe's flow heat transfer performance. The Petukhov correlation is shown as follows:…”

Section: Geometry and Boundary Conditionsmentioning

confidence: 99%

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Comprehensive Thermodynamic Analysis of He–Xe in Microchannels with Different Structures

et al. 2023

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He–Xe, with a 40 g/mol molar mass, is considered one of the most promising working media in a space-confined Brayton cycle. The thermodynamic performance of He–Xe in different configuration channels is investigated in this paper to provide a basis for the optimal design of printed circuit board plate heat exchanger (PCHE). In this paper, the factors affecting the temperature distribution of the He–Xe flow field are analyzed based on the flow heat transfer mechanism. It is found that the flow patterns in the logarithmic and outer zones determine the temperature distribution pattern of the flow field. A series of numerical simulations verify the above conclusions, and it is found that reasonable channel structure and operating conditions can significantly improve the thermodynamic performance of the He–Xe flow. Based on the above findings, the Zig channel is optimized, obtaining Sine and Serpentine channels with different structural characteristics. Comprehensive thermodynamic comparisons of the helium–xenon flow domains inside channels are performed, and the Serpentine channel with a shape factor of tan 52.5° is found with the best performance. This work aims to improve the understanding of the thermodynamic performance of He–Xe in microchannels and provide theoretical support for further optimization of PCHE employing He–Xe.

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Section: Geometry and Boundary Conditionsmentioning

confidence: 99%

Section: Geometry and Boundary Conditionsmentioning

confidence: 99%

Comprehensive Thermodynamic Analysis of He–Xe in Microchannels with Different Structures

et al. 2023

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“…However, the heat transfer correlations considering the physical property correction have not been given. Dragunov et al 24 performed an analytical and informative review on the literatures about convective heat transfer of binary gas mixtures, and several heat transfer correlations for circular and rod bundles were recommended. Nonetheless, the selection basis of the correlations is not clear.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on heat transfer characteristics of helium‐xenon gas mixture

et al. 2020

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Summary Helium‐Xenon (He‐Xe) gas mixture featured with low Prandtl number is increasingly used in various energy devices as heat‐carrying agent. To figure out the heat transfer characteristics of He‐Xe gas mixture in uniformly heated circular and tri‐lobe channels, numerical investigations are conducted and presented in the article. The adopted calculation models are validated by comparison between simulation results and experimental data. The local and total heat transfer characteristics are obtained, and new temperature correction factors for the circular and tri‐lobe channels are proposed and recommended. The simulation results obtained by using the SST k − ω turbulent model agree well with the experimental data, this kind of turbulent model matched with appropriate turbulent Prandtl number model could provide satisfactory temperature predictions for He‐Xe gas mixture in a wide range of temperature ratio Tw/Tb. The simplified Petukhov correlation with temperature correction can give conservative predictions with relative error less than 10%. For the tri‐lobe channel, due to the local restricted flow, the gas temperature at the corners is much higher than that at the concavities. The local wall temperature and local Nu number vary azimuthally, showing a large temperature gradient. The tri‐lobe channel has better heat transfer performance than that of the circular tube when the temperature ratio Tw/Tb is no more than 1.5, but it deteriorates significantly with the increasing temperature ratio. This article may contribute to the numerical simulation and thermal design of heat transfer components concerning He‐Xe gas mixture.

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“…[37][38][39] to evaluate their applicability to the studied helium-xenon mixtures (0.2 ≤ Pr ≤ 0.3).As shown in Figure15, the experimental data of binary gas mixtures including helium-xenon mixtures by Taylor et al are introduced for comparison. Results show that the Dittus-Boelter (DB) correlation and Colburn correlation, which were obtained by experimental data of medium and high Prandtl number fluids, obviously overpredict the Nusselt number of helium-xenon mixtures.…”

mentioning

confidence: 99%

Numerical Investigation on Turbulent Flow and Heat Transfer of Helium-Xenon Gas Mixture in a Circular Tube

Zhou

Han

Sun

et al. 2021

Science and Technology of Nuclear Installations

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Gas-cooled space nuclear reactor system usually utilizes the helium-xenon gas mixture as the working fluid. Since the typical helium-xenon mixture has the Prandtl number of about 0.2, which is lower than that of water and air, the turbulent flow and heat transfer features need to be further investigated among the helium-xenon mixture and other fluids. In the current paper, numerical investigations by ANSYS Fluent are performed on helium-xenon mixture flow (HeXe40, M = 40.0 g/mol, Pr = 0.21), airflow (Pr = 0.71), and water flow (Pr = 6.99) in the circular tube. Direct numerical simulation results of liquid metal flow (Pr = 0.01) are also adopted for comparison. Results show that the dimensionless velocity profile and shear stress in the boundary layer of HeXe40 are close to those of other fluids. The empirical correlations from other fluids can also predict well the friction factor of helium-xenon mixtures. Due to the discrepancy in turbulent heat diffusivity ratio, the dimensionless radial temperature profile and turbulent heat conduction of HeXe40 significantly differ from those of other fluids. The molecular conduction region of HeXe40 develops up to y+ ≈ 30 and extends to the logarithmic region of the flow boundary layer. Moreover, the available experimental Nusselt numbers of helium-xenon mixtures are compared with several convective heat transfer correlations, in which Kays correlation is better.

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On the choice of correlations for calculating the heat transfer coefficient in binary gas mixtures

Cited by 15 publications

References 13 publications

Comprehensive Thermodynamic Analysis of He–Xe in Microchannels with Different Structures

Comprehensive Thermodynamic Analysis of He–Xe in Microchannels with Different Structures

Numerical investigation on heat transfer characteristics of helium‐xenon gas mixture

Numerical Investigation on Turbulent Flow and Heat Transfer of Helium-Xenon Gas Mixture in a Circular Tube

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