Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

Sivasubramanian, M.; Kanna, P. Rajesh; Uthayakumar, M.; Ganesan, P.

doi:10.1007/s13369-015-1570-8

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Furthermore, the rate of electronic component failure has been reported to almost doubles with every 10 °C increase above the prescribed operating temperature [10][11][12][13]. Thus, heat transfer becomes an important aspect to realise value and life from electronics [6,14]. Consequently, different approaches are used for thermal management in telecommunication cabinets to uphold the reliability of the system.…”

Section: Introductionmentioning

confidence: 99%

Alternative Internal Configurations for Enhancing Heat Transfer in Telecommunication Cabinets

2023

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Telecommunication systems have become a critical part of society which enables connectivity to many essential and trivial services. Consequently, telecommunication equipment is housed in cabinets to protect the electronics from a variety of hazards; one of which is temperature-related failure. Current practices use a notable amount of power for the thermal management of telecommunication cabinets which can be reduced by considering alternative methods of cooling. In this paper, experiments were carried out to investigate the effectiveness of different internal mounting configurations of electronic components on the thermal performance of a telecommunication cabinet. The investigation tested inclinations (0–90°), different staggered offsets (0–50 mm), changing stream-wise spacing (29–108 mm), and fan speed (with a Reynolds number in the range of 1604 to 5539). The experimental study revealed that heat transfer was enhanced by 9.99% by altering component inclination to 90°, 25.90% by increasing stream-wise spacing from 29 mm to 108 mm, and 36.02% by increasing the Reynolds number from 1604 to 5539. However, the staggered arrangement of internal components decreased Nu by 3.26% for the natural convection condition but increased by 5.69% for the forced convection condition over the tested range and increasing the centre offset of the staggered components with respect to the cabinet did not influence Nu in any significant manner. Natural convection and forced convection also had notable influence on the heat transfer rate. Hence it was seen that alternative internal configurations positively influence heat transfer in telecommunication cabinets for the cases studied.

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Section: Introductionmentioning

confidence: 99%

Alternative Internal Configurations for Enhancing Heat Transfer in Telecommunication Cabinets

2023

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“…Experimental works, in general, contain very few examples of laminar BFS heat transfer. However, similar geometries that can be used by resemblance exist [31]. Li et al [32] investigated perturbated turbulent flow over BFS.…”

Section: Introductionmentioning

confidence: 99%

Numerical Forced Convection Heat Transfer of Nanofluids over Back Facing Step and Through Heated Circular Grooves

Abdulkarim¹,

Eleiwi²,

Tahseen³

et al. 2021

MMEP

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Backward facing step arrangement is a classical case for fluid dynamics and heat transfer research. It is well characterized and therefore, used for benchmarking. However, ongoing studies reveal that the geometry also provide advantages in industry, especially in combustion and burners. This work utilizes computational fluid dynamics to investigate a specific laminar back facing step flow heat transfer case. Aluminium oxide nano particles are considered as an additive to water base fluid, forming nanofluid with different volumetric concentrations. Laminar flow passes a back facing step and encounters three circular grooves at bottom surface. All surfaces are adiabatic except the grooves. Constant surface temperature applies to the grooves. According to the simulation results, a separation bubble after back facing step and a reattachment point occur. Grooves alter expected wake due to physical and thermal interference. Investigation parameters are nano-particle concentration and Reynolds number. Reynolds number changes between 10 and 250. Nano particle volume fraction percentage changes between 2 and 6 percent. Sectional heating downstream of the step poses interesting heat flux in the presence of Aluminium oxide nano-particle concentrations. There is a pseudo-linear relationship between parameters and heat transfer. Combined effects of enhanced thermal conductivity and secondary flow structures are seen. As expected, thermal convection increases as flow velocity and nano-particle concentrations increase. Heat flux and accordingly Nusselt number are highly affected from Reynolds number since flow structure changes dramatically. Also, direct proportion is seen between nano-particle concentration and enhanced convection.

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“…Numerous active and passive techniques are available in the literature which aids in enhancing the heat transfer characteristics of conventional fluids [1][2][3][4][5][6][7]. But the heat transfer augmentation through these techniques has reached a bottleneck.…”

Section: Introductionmentioning

confidence: 99%

Forced Convective Heat Transfer of MWCNT/Water Nanofluid Under Constant Heat Flux: An Experimental Investigation

et al. 2015

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This research article investigates the effect of multi-walled carbon nanotubes (MWCNT)/water nanofluid on convective heat transfer in a uniformly heated copper tube under laminar flow regime. The MWCNT were synthesized using chemical vapor deposition method and characterized using transmission electron microscope. These nanoparticles were dispersed (with 0.05, 0.1, 0.3 and 0.5 % weight concentrations) in distilled water to form stable suspensions of nanofluids. The heat transfer coefficients (HTC) of nanofluids and distilled water (base fluid) were evaluated and compared using constant velocity basis. The thermophysical properties of nanofluids change with the addition of nanoparticles; thus, we have considered the constant velocity criteria which provide the true comparison in contrast to constant Reynolds number used by earlier researchers. The effect of flow velocity (0.166-0.232 m/s) and nanoparticles weight concentration on the HTC considering constant heat flux boundary conditions was studied. It is observed that with the increase in the weight concentration of nanoparticles or flow velocity, the HTC increases. Nanofluids show higher HTC with respect to distilled water at all the concentrations of nanoparticles. At 0.5 wt.% weight concentration and flow velocity of 0.232 m/s, the maximum HTC obtained is 77.60 % in comparison with distilled water. B Munish Gupta

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Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

Cited by 5 publications

References 31 publications

Alternative Internal Configurations for Enhancing Heat Transfer in Telecommunication Cabinets

Alternative Internal Configurations for Enhancing Heat Transfer in Telecommunication Cabinets

Numerical Forced Convection Heat Transfer of Nanofluids over Back Facing Step and Through Heated Circular Grooves

Forced Convective Heat Transfer of MWCNT/Water Nanofluid Under Constant Heat Flux: An Experimental Investigation

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