Experimental and numerical investigations of heat transfer and flow characteristics of cross-cut heat sinks

Chingulpitak, Sakkarin; Chimres, Nares; Nilpueng, Kitti

doi:10.1016/j.ijheatmasstransfer.2016.05.098

Cited by 43 publications

(13 citation statements)

References 18 publications

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“…The comparison results showed that the turbulent model was more predictive than the laminar model. That is consistent with the studies of Sahiti et al, Chingulpitak et al, and Chimres et al in the case of the turbulent flow occurring at a low Reynolds number. Thus, the SST model was applied in this study.…”

Section: Methodssupporting

confidence: 93%

Experimental and numerical study on heat transfer and flow characteristics in an alternating cross‐section flattened tube

Rukruang

Chimres

Kaew-On

2018

Heat Trans. Asian Res.

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An experimental and numerical study on convection heat transfer of water flowing through an alternating cross-section flattened (ACF) tube are investigated in this paper. The thermal-fluid characteristics were evaluated by numerical simulation. The test run conditions covered a mass flux of 200 to 800 kg m −2 s −1 , a heat flux of 10 kW/m 2 , and an inlettemperature of 40°C. The results showed that the Nusselt number increased with the increase in mass flux. Moreover, the heat transfer was also affected by the flow characteristics. Vortices were formed at the curved wall, and their intensities were increased along the flow direction. It was also found that the heat transfer and pressure drop were larger than that of the circular tube. However, the thermal performance was greater than the pressure loss penalty.The comparison results showed that the ACF tube had better performance than the circular tube. Further, the details of heat transfer, flow resistance, and fluid behavior were investigated and discussed in this study. K E Y W O R D S alternating flattened (AF) tube, computational fluid dynamics (CFD), flow characteristics, heat transfer enhancement, vortex generation Heat Transfer-Asian Res. 2019;48:817-834.wileyonlinelibrary.com/journal/htj

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Section: Methodssupporting

confidence: 93%

Experimental and numerical study on heat transfer and flow characteristics in an alternating cross‐section flattened tube

Rukruang

Chimres

Kaew-On

2018

Heat Trans. Asian Res.

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“…Moreover, this observation is consistent with Kim and Kim's [22] study, which indicated that the thermal performance of a heat sink with a cross-cut is significantly greater than a heat sink with multiple cross-cuts. Likely, Chingulpitak and colleges [23] also stated that the cross-cut heat sink gave larger thermal performance than the convectional plate fin heat sink.…”

Section: Figs 7 (A) and (B) Show Comparison Between The Experimentalmentioning

confidence: 99%

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

Duangthongsuk

Wongwises

2017

Experimental Thermal and Fluid Science

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“…It was found that the heat sink with a rib height ratio of 0.28 gave the best hydrothermal performance. Chingulpitak et al (2016) estimated the optimum conditions of crosscut heat sinks. The study was performed at Re ranging between 800 and 1500.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape

Nilpueng

2021

JTST

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Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape Abstract The concept of heat transfer enhancement in a plate fin heat sink (PFHS) using twisted tape is presented. The airflow behavior in the flow channel and heat sink performance are investigated at the Reynolds numbers between 2000 and 5000. The twisted tape and perforated twisted tape with twist ratio between 2.5 and 3.5 are equipped between the fins of the PFHS. For perforated twisted tape, the holes are drilled along the twisted tape length with the ratio of perforation diameter to twisted taped width (d/W) between 0.2 and 0.6. The heat transfer coefficient and pressure drop are enhanced by decreasing the twist ratio and increasing the Reynolds number and the d/W ratio between 0.2 and 0.4. However, they are dropped when the d/W ratio higher than 0.4. The highest thermal performance factors of the plate fin heat sink equipped with twisted tape (PFHSTT) and the plate fin heat sink equipped with perforated twisted tape (PFHSPTT) are 1.28 and 1.33, respectively. The correlations of the Nusselt number and friction factor related to twist ratio and d/W ratio are generated and proposed for designing and selecting in the future.

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Experimental and numerical investigations of heat transfer and flow characteristics of cross-cut heat sinks

Cited by 43 publications

References 18 publications

Experimental and numerical study on heat transfer and flow characteristics in an alternating cross‐section flattened tube

Experimental and numerical study on heat transfer and flow characteristics in an alternating cross‐section flattened tube

An experimental investigation on the heat transfer and pressure drop characteristics of nanofluid flowing in microchannel heat sink with multiple zigzag flow channel structures

Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape

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