Thermal visualization on surface with transverse perforated ribs

Nuntadusit, Chayut; Wae-hayee, Makatar; Bunyajitradulya, Asi; Eiamsa-ard, Smith

doi:10.1016/j.icheatmasstransfer.2012.03.001

Cited by 49 publications

(11 citation statements)

References 16 publications

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“…Nuntadusit et al [108] investigated the local heat transfer and flow characteristics using Liquid Crystal Thermography in a channel with six types of transverse perforated baffles. It was found that the local Nu value immediately behind the rib was increased by decreasing the height of the perforation hole.…”

Section: Baffles Used As Roughness Turbulence Promoters In Solar Air mentioning

confidence: 99%

Convective heat transfer enhancement in solar air channels

Kumar

Kim

2015

Applied Thermal Engineering

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Section: Baffles Used As Roughness Turbulence Promoters In Solar Air mentioning

confidence: 99%

Convective heat transfer enhancement in solar air channels

Kumar

Kim

2015

Applied Thermal Engineering

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“…Nuntadusit et al [29] presented the heat transfer and flow characteristics in a channel with different types of transverse perforated ribs (Fig. 23).…”

Section: Rough Surfaces (Corrugated Tube Rib)mentioning

confidence: 99%

“…Photographs of solid and perforated ribs: (a) solid rib, (b) straight perforated rib (h ¼0.2 H), (c) straight perforated rib (h ¼0.5 H), (d) straight perforated rib (h ¼0.8 H), (e) inclined perforated rib (θ¼151), and (f) inclined perforated rib (θ¼ 301)[29].…”

mentioning

confidence: 99%

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Sheikholeslami

Gorji-Bandpy

Ganji

2015

Renewable and Sustainable Energy Reviews

438

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“…These investigations showed that a roughened surface could enhance the local N u by up to 50% when compared to a smooth target surface, because of the turbulence induced by the surface roughness element. This enhancement due to surface roughness was investigated by many researchers employing different arrangements of jet impingement parameters [12][13][14][15][16][17][18]. More recent investigations [19,20] studied the effect of using novel jet impingement parameters such as solid volume fraction, Richardson number, and roughness element orientation on either local or average N u number heat transfer rate between the roughened surface and impingement jet.…”

Section: Introductionmentioning

confidence: 99%

Flow Structure and Heat Transfer of Jet Impingement on a Rib-Roughened Flat Plate

et al. 2018

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The jet impingement technique is an effective method to achieve a high heat transfer rate and is widely used in industry. Enhancing the heat transfer rate even minimally will improve the performance of many engineering systems and applications. In this numerical study, the convective heat transfer process between orthogonal air jet impingement on a smooth, horizontal surface and a roughened uniformly heated flat plate is studied. The roughness element takes the form of a circular rib of square cross-section positioned at different radii around the stagnation point. At each location, the effect of the roughness element on heat transfer rate was simulated for six different heights and the optimum rib location and rib dimension determined. The average Nusselt number has been evaluated within and beyond the stagnation region to better quantify the heat transfer advantages of ribbed surfaces over smooth surfaces. The results showed both flow and heat transfer features vary significantly with rib dimension and location on the heated surface. This variation in the streamwise direction included both augmentation and decrease in heat transfer rate when compared to the baseline no-rib case. The enhancement in normalized averaged Nusselt number obtained by placing the rib at the most optimum radial location R/D = 2 was 15.6% compared to the baseline case. It was also found that the maximum average Nusselt number for each location was achieved when the rib height was close to the corresponding boundary layer thickness of the smooth surface at the same rib position.

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Thermal visualization on surface with transverse perforated ribs

Cited by 49 publications

References 16 publications

Convective heat transfer enhancement in solar air channels

Convective heat transfer enhancement in solar air channels

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Flow Structure and Heat Transfer of Jet Impingement on a Rib-Roughened Flat Plate

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