Natural Convection Enhancement on Micro-Grooved Surfaces

Wang, Ting; Mislevy, Scott P.; Huang, John

doi:10.1615/jenhheattransf.v1.i3.60

Cited by 9 publications

(9 citation statements)

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“…The ribbed base width, ribbed tip width, ribbed base gap, ribbed tip gap, ribbed height, ribbed pitch and ribbed spiral angle however decreased after 12 multi-pass drawings of the ISRCT. [4] The results of the experimental and 3D FEM simulation were coincident with data from the tube sinking method.…”

Section: Discussionsupporting

confidence: 62%

“…Since the inner surface of the tube is not supported, wall thickness and the internal surface may become uneven [3]. Micro-groove fin-inside tubes have excellent heat transfer enhancement and capillary geometry; they are used in microheat pipes and generally enhance natural convection by 20 % and overall heat transfer by 8 % [4]. An investigation into the characteristics of copper-finned micro-grooved surfaces for effective evaporation heat transfer with applications to the cooling of high flux electronics found that the microgrooves increase the internal surface area of the tubes and this greatly improves the heat transfer capability compared to flat/smooth tubes.…”

Section: Introductionmentioning

confidence: 99%

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3D FEM validation of ultra-small inner spiral ribbed copper tube using the tube sinking method

Tangsri

Norasethasopon

2015

Int J Adv Manuf Technol

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This research related to the development of ultrasmall inner spiral ribbed copper tubes (ISRCTs) which have high quality and efficiency in transferring heat. The deformation behaviour of the ISRCT was studied. Three-dimensional finite element models were constructed for the various process parameters: the change of the cross-section profiles of the ribbed contours and the spiral angle of the ribbed area of the ISRCT, for twelve multi-pass drawings through the die using the tube sinking method. The effect of the ribbed spiral angle and the ribbed cross-sectional profile was also studied. Modelling and simulation techniques were performed using commercial Abaqus software to learn whether the surface profiles of the ISRCT increased or reduced with tube sinking using the finite element method (FEM). Results of the multi-pass drawing analysis were summarised and compared to the experimental findings. The FEM simulation approach was used to analyse the changes of ten parameters: von Mises stress, wall thickness, ribbed base width, ribbed tip width, ribbed base gap, ribbed tip gap, ribbed height, ribbed pitch, axial displacement and ribbed spiral angle. This procedure can be used to improve product quality and to study the effect of the various parameters. The results will be very valuable for researchers and well engineers for future design of ultra-small ISRCT to improve the quality and efficiency of heat transfer.

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Section: Discussionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

3D FEM validation of ultra-small inner spiral ribbed copper tube using the tube sinking method

Tangsri

Norasethasopon

2015

Int J Adv Manuf Technol

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“…Wang et al (1994) confirmed that natural convection enhanced 20% and overall heat transfer enhanced 8% when 150 m micro-grooves were used. Al-Hajri et al (2005) investigated the characterization of copper-finned micro-grooved surfaces for effective evaporation heat transfer, which can be applied to cooling of high flux electronics.…”

Section: Introductionsupporting

confidence: 59%

A novel finned micro-groove array structure and forming process

Tang

Chi

Wan

et al. 2008

Journal of Materials Processing Technology

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“…A lot of studies have been focused on geometry design of the spiral teeth from perspective of thermal performance, such as effects of teeth height and helix angle on thermal efficiency and pressure drop (Wang et al, 1994;Miyara and Otsubo, 2002) or sectional geometry of teeth on heat transfer characteristics (Kim and Shin, 2005). However, for ERW (electronic resistance welding) tubes, the grooves/teeth designed and embossed on the copper strips undergo plastic deformation during the tube expansion process.…”

Section: Introductionmentioning

confidence: 99%