Experimental study of forced convective heat transfer in a different arranged corrugated channel

Pehlivan, Hüseyin; Taymaz, İmdat; İslamoğlu, Yaşar

doi:10.1016/j.icheatmasstransfer.2013.05.016

Cited by 60 publications

(18 citation statements)

References 25 publications

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“…From that, the decreasing in Nusselt number may be interpreted by the significant augmentation of fluid conductivity in these conditions. This tendency is clearly shown by Pehlivan et al [20] results. Other study of Habib et al [21] shows that the mean Nusselt number starts decreasing from value of Reynolds number equal to 10,000 under turbulent regime.…”

Section: The Mean Nusselt Numbersupporting

confidence: 52%

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Experimental study of an upward sub-cooled forced convection in a rectangular channel

et al. 2015

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Section: The Mean Nusselt Numbersupporting

confidence: 52%

“…For a Reynolds number lower than 1500, the mean Nusselt number compared with that of Pehlivan et al [20] is represented in Fig. 10.…”

Section: The Mean Nusselt Numbermentioning

confidence: 99%

Experimental study of an upward sub-cooled forced convection in a rectangular channel

et al. 2015

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“…Different orientations and arrangements have been seen in the studies including the triangle ribs. The staggered arrangement (Kilicaslan and Sarac [21]) and the symmetrical arrangement (Pehlivan et al [22], Aslan et al [23]) for the triangular cross-sectional ribs have been seen. Moreover, the specific geometrical shapes for the ribs have also been encountered such as convex-concave (Wongcharee et al [8], Yemenici and Umur, [24]), semi-circular cross-sectional (Kilicaslan and Sarac [21], Nine et al [25]), sinusoidal (Aslan et al [23]), diamond-shaped (Sripattanapipat and Promvonge [26]), trapezoidal (Ahmed et al [27]) in the previous studies.…”

Section: Introductionmentioning

confidence: 93%

Visualization of flow characteristics between the ribbed plates via particle image velocimetry

2021

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Heat transfer is considerably influenced by flow stagnation, separation and reattachment regions due to the ribbed plates. Placing the ribs such as fins, turbulators that trigger the flow separation, enhances the heat transfer inside the channel by increasing the turbulence intensity. The flow separation is caused by disturbing the thermal and hydrodynamic development lengths. Moreover, these ribs also make an impact that increases the heat transfer by enlarging the heat transfer area. However, the ribs lead to the increment of the required pumping power in the meantime due to the increasing pressure loss in such systems. This aforementioned method is used for the heat exchangers, the solar collectors, the cooling of electronic devices. The investigation of the flow characteristics is very crucial to understand the heat transfer mechanism in the ducts for this reason. In the present paper, the flow characteristics between the plates have been experimentally researched. Particle Image Velocimetry system in the open water channel of Selcuk University Advanced Technology Research and Application Center has been used. The smooth plates have been taken as the reference model and used for the comparison with the plates having the rectangular cross-sectional ribs. The ribs with various heights of 0.1 ≤ h' = h/H ≤ 0.3 have been symmetrically placed on the internal surfaces of the plates via several spacing values of 0.5 ≤ S' = S/H ≤ 1 for varying Reynolds numbers as 10000 ≤ Re ≤ 20000. As a result, the flow characteristics have been given in terms of the contour graphics for velocity vector field, velocity components and vorticity.

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“…Increasing the baffle height enhances heat transfer effectively but leads to dramatic penalty in pressure drop. Pehlivan et al [14] experimentally investigated the rate of heat exchange for sharp corrugation peak fins of corrugated channel for three different types and sinusoidal converging-diverging channels. It is reported that the rate of heat transfer increases with the corrugated angle.…”

Section: Introductionmentioning

confidence: 99%

Thermal-Hydrodynamic Characteristics of Turbulent Flow in Corrugated Channels

Dhaidana¹,

Abbas²

2020

Boundary Layer Flows - Theory, Applications and Numerical Methods

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The heat transfer-flow characteristics of turbulent flow inside corrugated channels heated by constant heat flux are numerically investigated. The rate of heat transfer, pressure drop, and performance evaluation criterion is determined for smooth channel and various designs of corrugated channels at the Reynolds number ranged from 5000 to 60,000. The effect of rib arrangement distributions of inward, outward, and inward-outward ribs are examined. The various rib configurations of corrugated channels are also tested. In addition, the influences of rib roughness parameters (height, pitch, and width) and rib shapes (semicircular, trapezoidal, and rectangular) are researched. The Reynolds-averaged Navier-Stokes equations (RANS) are used to model the governing flow equations. The computational model is validated through a reasonable agreement between the present numerical results and the outcomes of related works. For different geometrical and operating conditions, the results revealed that the rate of heat exchange in corrugated channels exceeds higher than that of smooth ones but with additional pressure loss. Moreover, the rib arrangements, rib configuration, and rib roughness parameters exhibit a relatively significant effect on the performance of the corrugated channels. On the other hand, the influence of the rib shapes seems to be small.

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Experimental study of forced convective heat transfer in a different arranged corrugated channel

Cited by 60 publications

References 25 publications

Experimental study of an upward sub-cooled forced convection in a rectangular channel

Experimental study of an upward sub-cooled forced convection in a rectangular channel

Visualization of flow characteristics between the ribbed plates via particle image velocimetry

Thermal-Hydrodynamic Characteristics of Turbulent Flow in Corrugated Channels

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