Influence of inlet contraction ratios on the heat transfer and pressure drop characteristics of single-phase flow in smooth circular tubes in the transitional flow regime

Bashir, Abubakar Idris; Everts, Marilize

doi:10.1016/j.expthermflusci.2019.109892

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…Additionally, calibration of experimental apparatus, logging frequency of the data acquisition system, and measurement of the roughness of test section are some of the points that should be considered during the experiments. References [63], [64], and [65] can help the readers who want to get further information. All of the thermophysical and rheological properties of the nanofluids should be measured accurately since these properties are used to calculate the Reynolds number, the Nusselt number, and the friction factor.…”

Section: Accepted Manuscript / Clean Copymentioning

confidence: 99%

A review on laminar-to-turbulent transition of nanofluid flows

Subasi

Özdemir²,

Estellé³

2022

J Therm Anal Calorim

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Accepted Manuscript / Clean Copymentioning

confidence: 99%

A review on laminar-to-turbulent transition of nanofluid flows

Subasi

Özdemir²,

Estellé³

2022

J Therm Anal Calorim

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“…In mixed convection, the buoyancy effects of the liquid cause density changes in the radial direction. Therefore, the transition occurred well before the Reynolds number reached 4,000, and this was dependent on factors such as the heating rate and the geometry of the inlet [1,2]. They defined the transition zone to include sections of both the quasiturbulent and turbulent flow regions.…”

Section: Introductionmentioning

confidence: 99%

Forecast Study on the Overall Coefficient for Passage of Single-Phase and Passage of Single-Phase in an Annular to Plain Tubes Heat Stream

Alsulaiei,

Abid,

Shakir

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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To prevent buoyancy effects from increasing the overall heat transfer coefficient due to low heat flux, smooth vertical circular tubes require forced convection conjectures. Previous research has focused on mixed convection in turbulent regions and has limited studies on forced convective heat transfer. This study aims to investigate the predictable overall coefficients of heat transfer performance under specific conditions of forced convection, considering both vertical up flow and down flow through the smooth circular test section. The recommended Reynolds numbers for water are (7201.6–14577.4) and (3186.7–6396.75) for single-phase and single-phase annular passages, respectively, with a heat application range of (50–500 W). The overall coefficient of heat transfer is (333.91 - 432.95 W/m2.K) and (169.76 - 251.20 W/m2.K) for single-phase and single-phase annular passages, respectively. The flow was turbulent for all heat fluxes.

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“…Whereas at Re above 1000 the bend loss coefficient Kb almost remains constant and change in the range of ±10 %. The other finding shows that a reduction in diameter bend tube can increase the pressure drop [13] [14]. Papautsky [15] presents experimental findings in the domain of single-phase internal fluid flow at the microscale [16].…”

Section: Introductionmentioning

confidence: 99%

A review of single-phase pressure drop characteristics microchannels with bends

Junianto

Hendrarsakti

2021

J. Mechatron. Electr. Power Veh. Technol.

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Microfluidic use in various innovative research, many fields aimed at developing an application device related to handling fluid flows in miniature scale systems. On the other hand, on the use of micro-devices for fluid flow the existence of bends cannot be avoided. This research aims to make a comprehensive study of fluid flow characteristics through a microchannel with several possible bends. This study was conducted by comparing Reynolds number versus pressure drop in a serpentine microchannel to gain bends loss coefficient. The result showed that the fluid flow with Re 100 did not affect the pressure drop, but on the Reynolds number above that, the pressure drop was increased along with the appears of vortices in the outer and inner walls around the channel bends which causes an increase in an additional pressure drop. The other finding shows that the reduction in diameter bend tube can increase the pressure drop.

show abstract

Influence of inlet contraction ratios on the heat transfer and pressure drop characteristics of single-phase flow in smooth circular tubes in the transitional flow regime

Cited by 9 publications

References 35 publications

A review on laminar-to-turbulent transition of nanofluid flows

A review on laminar-to-turbulent transition of nanofluid flows

Forecast Study on the Overall Coefficient for Passage of Single-Phase and Passage of Single-Phase in an Annular to Plain Tubes Heat Stream

A review of single-phase pressure drop characteristics microchannels with bends

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