Bubble dynamics of water-ethanol mixture during subcooled flow boiling in a conventional channel

Suhas, B. G.; Sathyabhama, A.

doi:10.1016/j.applthermaleng.2016.11.126

Cited by 18 publications

(3 citation statements)

References 35 publications

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“…This is because sufficient amount of energy is acquired by liquid flow on the heating wall at higher values of heat fluxes, allowing the liquid fluid to overcome the intermolecular force of the molecules, causing faster local liquid phase change, i.e. higher evaporation rate, that leads to a reduction in bubbles growth time [17,43].…”

Section: Effect Of Wall Heat Fluxmentioning

confidence: 99%

An experimental investigation on bubbles departure characteristics during sub-cooled flow boiling in a vertical U-shaped channel utilizing high-speed photography

Holagh

Abdous

Roy

et al. 2021

Thermal Science and Engineering Progress

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Section: Effect Of Wall Heat Fluxmentioning

confidence: 99%

An experimental investigation on bubbles departure characteristics during sub-cooled flow boiling in a vertical U-shaped channel utilizing high-speed photography

Holagh

Abdous

Roy

et al. 2021

Thermal Science and Engineering Progress

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“…It finds significant applications in both the industrial and domestic sectors due to its exceptional cooling efficiency. Flow boiling effectively addresses the challenge of dissipating large heat flow in both small-scale (mini-channels and microchannels) [1][2][3][4][5] and large-scale (conventional/macro-channels) cooling applications [6][7][8][9]. Its industrial applications cover electronic and microelectronic devices, data centers, boiler tubes, and evaporators, as well as domestic applications, such as air cooling, refrigeration, and household appliances.…”

Section: Introductionmentioning

confidence: 99%

Flow Boiling Heat Transfer; Experimental Study of Hydrocarbon Based Nanorefrigerant in a Vertical Tube

Hernaiz,

Elexpe,

Aranzabe

et al. 2023

Nanomaterials

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Flow boiling is a complex process but very efficient for thermal management in different sectors; enhancing flow boiling heat transfer properties is a research field of great interest. This study proposes the use of various nanomaterials, carbon-based materials, and metal oxides; in n-pentane as a hydrocarbon-based refrigerant to enhance the flow boiling heat transfer coefficient. This thermal property has been experimentally evaluated using a vertical evaporation device of glass with an internal diameter of 20 mm. The results have shown that proposed nanomaterials dispersion in n-pentane has a limited effect on the thermophysical properties and is conditioned by their dispersibility but promotes a significant increment of pentane heat transfer coefficient (h), increasing the overall heat transfer coefficient (U) of the evaporator. The enhanced heat transfer performance is attributed to the behavior of nanoparticles under working conditions and their interaction with the working surface, promoting a higher generation of nucleation sites. The observed behavior suggests a heat transfer mechanism transition from forced convection to nucleate heat transfer, supported by visual observations.

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“…Detailed investigation on subcooled flow boiling of waterethanol mixture is limited in literature which is essential to design the cooling devices. In view of this, the understanding of the bubble behavior and its effect on heat transfer significantly contributes to a better understanding of physical phenomena in subcooled flow boiling [15,16]. Hence flow visualization is essential to study the bubble dynamics of water-ethanol mixture during subcooled flow boiling.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Forced Convective and Subcooled Flow Boiling Heat Transfer Coefficients of Water-Ethanol Mixture: Numerical Study

Gopalakrishna¹,

Lakkanna²,

Alangar³

2021

IJHT

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The subcooled flow boiling is related to the operation of electronic devices, Hybrid electric vehicle (HEV) Battery module and small catalytic reactors. It is well known that the operational temperature must be maintained to avoid any malfunction of these heat dissipative devices. In this paper the forced convective and subcooled flow boiling heat transfer coefficients of water-ethanol mixture is determined numerically by Volume of fluid analysis (VOF). The interaction between liquid and local vapour is analysed by solving the bubble volume of fraction in the numerical study. Crank Nicolson implicit scheme is used for discretizing the scalar convection equation for bubble void fraction and transforming into algebraic equation. Thomas Algorithm is used to solve the algebraic equations of bubble void fraction. The corrector predictor equation method is used to solve for bubble void fraction when the value obtained is less than 0 or exceeds 1. The thermodynamic and Thermophysical properties are substituted in the x-momentum and energy equation to determine the values of pressure drop, velocity and temperature of the fluid. From the temperature values, the subcooled flow boiling heat transfer coefficient is obtained. It is found that the addition of ethanol to water decreases the forced convective and subcooled flow boiling heat transfer coefficient of the water-ethanol mixture. The numerically determined heat transfer coefficient of water ethanol mixture is compared with that of the experimental results. The average deviation between the experimentally determined and numerically determined subcooled flow boiling heat transfer coefficient of water ethanol-mixture is found to be 24.13%.

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Bubble dynamics of water-ethanol mixture during subcooled flow boiling in a conventional channel

Cited by 18 publications

References 35 publications

An experimental investigation on bubbles departure characteristics during sub-cooled flow boiling in a vertical U-shaped channel utilizing high-speed photography

An experimental investigation on bubbles departure characteristics during sub-cooled flow boiling in a vertical U-shaped channel utilizing high-speed photography

Flow Boiling Heat Transfer; Experimental Study of Hydrocarbon Based Nanorefrigerant in a Vertical Tube

Investigation of Forced Convective and Subcooled Flow Boiling Heat Transfer Coefficients of Water-Ethanol Mixture: Numerical Study

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