The Characteristics of Fluid Flow and Heat Transfer in Wavy, Dimple and Wavy-Dimple Microchannels

Gong, Liang; Wei, Bo

doi:10.4028/www.scientific.net/amm.394.173

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…It was found that the protrusion package with a depth h to diameter D ratio of h/D = 0.26 provides the maximum thermo-hydraulic performance. Gong and Wei (2013) numerically studied the flow and heat transfer characteristics in wave, protrusion and wave-protrusion micro channels. The results show that, in micro channels heat sink, the protrusion structure could reduce the flow resistances and the wavy wall could enhance heat transfer.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that, in micro channels heat sink, the protrusion structure could reduce the flow resistances and the wavy wall could enhance heat transfer. Gong and Wei (2013) designed two kinds of micro channel radiators with protrusions and corrugated walls and studied their flow and heat transfer characteristics. The results showed that the wave-protrusion micro channel radiator has the characteristics of low pressure drop and enhancing heat transfer.…”

Section: Introductionmentioning

confidence: 99%

“…studied the vortex structure and enhanced heat transfer mechanism of turbulent flow over staggered protrusions in a narrow channel by experiment and simulation. It was found that the protrusion package with a depth h to diameter D ratio of h/D = 0.26 provides the maximum thermo-hydraulic performance Gong and Wei (2013). numerically studied the flow and heat transfer characteristics in wave, protrusion and wave-protrusion micro channels.…”

mentioning

confidence: 99%

“…numerically studied the flow and heat transfer characteristics in wave, protrusion and wave-protrusion micro channels. The results show that, in micro channels heat sink, the protrusion structure could reduce the flow resistances and the wavy wall could enhance heat transfer Gong and Wei (2013). designed two kinds of micro channel radiators with protrusions and corrugated walls and studied their flow and heat transfer characteristics.…”

mentioning

confidence: 99%

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Investigations of water-cooled tubes with protrusions for flow and heat transfer characteristics

Wang

Zhang

2020

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Purpose This study aims to present a numerical study on the flow and heat transfer performance of a water-cooled tube with protrusions in different geometrical parameters. Design/methodology/approach A new type of enhanced heat exchanger tube is designed. Protrusions are formed on the inner surface of the tube by mechanical expansion, compression and other processing methods. A three-dimensional numerical symmetry model is established by ANSYS for studying the influence of protrusion distance, protrusion radius and protrusion arrangement on flow and heat transfer characteristics in turbulent flow. Findings The results show that the protrusions increase the heat transfer area and improve the heat transfer effect but also increase the flow resistance. Performance evaluation criteria (PEC) is applied to evaluate the flow and heat transfer characteristics of convex tubes. When adopting the aligned protrusions arrangement, the radius of 2 mm and distance of twice the protrusion radius is most heat transfer effect. The PEC of protrusion tubes with a staggered arrangement are higher than those in aligned arrangement, and the maximum value is 2.36 when Reynolds number is 12,000. Originality/value At present, most of the protrusion technology applications are based on the cold plate heat dissipation of electronic devices, and the flow path is rectangular. Convex tube heat exchanger is a high-efficiency heat exchanger, which uses convex tubes instead of smooth tubes in tubular heat exchangers to enhance heat transfer and widely used in petroleum, chemical, textile, oil refining and other industries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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