Pool boiling heat transfer and bubble dynamics of modified copper micro-structured surfaces

Sen, Pulak; Kalita, Sanjib; Sen, Dipak; Saha, Bidyut Baran

doi:10.1016/j.icheatmasstransfer.2022.106039

Cited by 20 publications

(2 citation statements)

References 58 publications

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“…In the above equation, C sf is set to 0.0165. 36 In our study, the selection of a specific C sf value is guided by previous research and empirical data. The chosen value of C sf reflects a balance between available experimental evidence and the characteristics of our specific surface roughness conditions.…”

Section: Validation Of Experimental Set Upmentioning

confidence: 99%

Experimental comparison of pool boiling characteristics between CNT, GO, and CNT + GO‐coated copper substrate

Kumar,

Kumari,

Rahul

et al. 2024

Heat Trans

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The present investigation aims to study the comparative analysis of CNT, GO, and CNT + GO nanoparticle coatings on copper surfaces under a pool boiling situation. Coating on copper surfaces is performed using the dip coating method. Pool boiling experiments are conducted for all the coated surfaces at atmospheric pressure. Water is used as a working fluid. A comparison was made based on the coated surface characteristics and pool boiling behavior of the samples. The results show that CNT + GO coating on copper surfaces is better in terms of critical heat flux (CHF) and boiling heat transfer coefficient (BHTC). It is also observed that CHF and BHTC of the CNT + GO‐coated surface are 129.19% and 194.75% higher, respectively, compared to the bare copper surface. Bubble dynamics studies were also performed for all the samples.

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Section: Validation Of Experimental Set Upmentioning

confidence: 99%

Experimental comparison of pool boiling characteristics between CNT, GO, and CNT + GO‐coated copper substrate

Kumar,

Kumari,

Rahul

et al. 2024

Heat Trans

Self Cite

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show abstract

“…The Fourth Industrial Revolution (Industry 4.0) has driven advancements in digital technologies, such as artificial intelligence, the Internet of Things, and big data. − These developments in digital technologies have ushered in tremendous growth in the amount of data. To process these data, processing units with high densities of transistors are needed, and these units generate large amounts of heat. − To dissipate this heat, advanced cooling technologies are needed for effective thermal management during the postprocessing of large amounts of data. In this context, boiling heat transfer, owing to its high thermal efficiency, has emerged as a vital next-generation cooling method from the perspective of catering to the rising demand for cooling technology. − This is because the phase change (from fluid to vapor) that occurs during boiling is accompanied by the absorption of large amounts of latent heat, which enhances the cooling performance.…”

Section: Introductionmentioning

confidence: 99%

Two-Phase Particle Image Velocimetry Visualization of Rewetting Flow on the Micropillar Interfacial Surface

Nam,

Cho,

Lee

et al. 2024

ACS Appl. Mater. Interfaces

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Boiling heat transfer has a high thermal efficiency by latent heat absorption, which makes it an attractive process for cooling electronic device chips. Critical heat flux (CHF), the maximum heat flux, is a crucial factor determining the operating range of the boiling applications. The CHF can be enhanced by improving the fluid supply to the boiling surface. Herein, micropillar interfacial surfaces have been proposed to increase the CHF by increasing the rewetting flow, which determines the fluidsupply capacity near the bubble contact line. A state-of-art twophase particle image velocimetry (two-phase PIV) technique is introduced for rewetting flow measurement on micropillar structures (MPSs) to analyze the CHF-enhancement mechanism. The two-phase PIV visualization setup offers high spatial (∼120 μm) and temporal (∼2000 Hz) resolutions for measuring rewetting flow during bubble growth. The MPS samples exhibit enhanced CHF and rewetting flows compared to those on a plain surface. The roughest case, D04G10 sample, had a CHF of 164 W/cm 2 , 1.84 times higher than that of the plain surface. The D04G10 sample also recorded the highest rewetting velocity of 0.311 m/s, 4.7 times higher than that of the plain surface. The comparison between the rewetting flow and wicking performance shows that wicking-induced flow accounted for a substantial part (∼17%) of the rewetting flow and contributed significantly to the CHF enhancement owing to large rewetting flow by delaying vapor-film formation. Based on these findings, a new CHF model suggested by introducing the rewetting parameter shows a high CHF prediction accuracy of 94%.

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Enhanced pool boiling heat transfer characteristics on microstructured copper surfaces coated with hybrid nanofluid

Rahul,

Kalita,

Sen

et al. 2024

J Therm Anal Calorim

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Pool boiling heat transfer and bubble dynamics of modified copper micro-structured surfaces

Cited by 20 publications

References 58 publications

Experimental comparison of pool boiling characteristics between CNT, GO, and CNT + GO‐coated copper substrate

Experimental comparison of pool boiling characteristics between CNT, GO, and CNT + GO‐coated copper substrate

Two-Phase Particle Image Velocimetry Visualization of Rewetting Flow on the Micropillar Interfacial Surface

Enhanced pool boiling heat transfer characteristics on microstructured copper surfaces coated with hybrid nanofluid

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