Numerical simulation and structure improvement of gravity-assisted phase transition cooling system used in heavy duty extrusion pelleting line

Zhu, Qiurui; Xia, Liangzhi; Dong, Dandan; Wang, Haonan; Mei, Wenqing

doi:10.1016/j.icheatmasstransfer.2020.104604

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Dimensionless phase-field variables are employed to ascertain the volume fractions of individual fluid components, expressed as (1 − ϕ )/2 and (1 + ϕ )/2, respectively. The phase-field variables are determined by the Cahn-Hilliard equation, which is a fourth-order partial differential equation, as follows [34]:…”

Section: Model Descriptionmentioning

confidence: 99%

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O

Tian,

Wang,

et al. 2024

J. Phys. D: Appl. Phys.

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Phase change cooling technology offers high cooling efficiency, safety, and reliability, representing a novel approach to achieving efficient heat dissipation for high-power and large-capacity electrical equipment. The formulation of the cooling medium is pivotal to phase change cooling technology. However, current media exhibit compatibility, stability, economy, and environmental friendliness deficiencies. Consideration could be given to implementing the C6F12O medium due to its superior overall performance and ability to meet the latent heat requirements in phase change cooling equipment. This paper employs a numerical simulation approach that combines the phase field method based on the Cahn-Hilliard equation with the theory of electrohydrodynamics. It investigates the impact of temperature, electric field intensity, and electric field direction on the evolution of bubble motion and the boiling state of the C6F12O medium, considering the interaction of electric-fluid-heat-phase fields. Numerical results indicate that the system undergoes initial nucleate boiling, nucleate boiling, and film boiling stages at T=330~335 K, T=335~350 K, and T≥355 K, respectively. The introduction of an appropriate electric field can enhance the motion evolution of C6F12O bubbles. However, attention must be paid to the formation of bubble channels under high field strength to prevent potential decreases in insulation performance. An inhomogeneous electric field in the vertical direction proves more effective in improving the bubble release rate compared to a uniform electric field. To some extent, an inhomogeneous electric field in the horizontal direction can prevent the mass accumulation of bubbles in regions of high field intensity. This research has the potential to offer theoretical guidance for the engineering application of the C6F12O phase change cooling medium.

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Section: Model Descriptionmentioning

confidence: 99%

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O

Tian,

Wang,

et al. 2024

J. Phys. D: Appl. Phys.

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Investigation of boiling heat transfer process in the barrel of a gravity heat pipe type extruder

Yu,

Qin,

Wang

et al. 2024

International Journal of Heat and Mass Transfer

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Numerical simulation and structure improvement of gravity-assisted phase transition cooling system used in heavy duty extrusion pelleting line

Cited by 2 publications

References 27 publications

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O

Investigation of boiling heat transfer process in the barrel of a gravity heat pipe type extruder

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Numerical simulation and structure improvement of gravity-assisted phase transition cooling system used in heavy duty extrusion pelleting line

Cited by 2 publications

References 27 publications

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C6F12O

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C6F12O

Investigation of boiling heat transfer process in the barrel of a gravity heat pipe type extruder

Contact Info

Product

Resources

About

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O

Numerical simulation of electric field-induced phase transition evolution and boiling characteristics in the evaporative cooling medium C₆F₁₂O