Convective heat transfer and pressure loss in rectangular ducts with drop-shaped pin fins

Chen, Z.; Li, Q.; Meier, D.; Warnecke, Hans‐Joachim

doi:10.1007/s002310050181

Cited by 61 publications

(29 citation statements)

References 6 publications

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“…In order to analyse the mechanism behind effective heat transfer but also the relatively high pressure drop associated with pin fins, different authors such as Theoclitus [5], Sparrow and Ramsey [6] and Sara et al [7] carried out basic research work focused on such aspects. There have also been noted some contributions concerning different shapes of pin fin cross-section such as Chen et al [8] and Li et al [9]. An extensive numerical investigation of influence of different pin cross section, in thermal and fluid dynamic characteristics of in-inline and staggered pin fin arrays is provided by Sahiti at al [10].…”

Section: Introductionmentioning

confidence: 95%

Interrelation between pin length and heat exchanger performance

Sahiti

2015

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 95%

Interrelation between pin length and heat exchanger performance

Sahiti

2015

Applied Thermal Engineering

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“…Experiments on drop-shaped pin-fins was conducted [11]. They reported a slight enhancement of heat transfer coefficient with a remarkable 42-51 % reduction of pressure drop.…”

Section: Introductionmentioning

confidence: 98%

Studying the performance of solid/perforated pin-fin heat sinks using entropy generation minimization

Elsayed

Mesalhy

2014

Heat Mass Transfer

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Heat transfer and pressure drop characteristics of a set of pin-fins with uniform heat flux were investigated experimentally and numerically. Test set-up was designed to assess the effects of mass flow rate, fin height, and fin density on convection heat transfer and pressure drop. In the numerical investigation, the flow field of various design parameters of the heat sink was simulated. It was found that heat sinks having fin heights of 20 and 30 mm operated at a lower Reynolds number reached minimum value for thermal resistance when the fin density 10 9 10. Which means it is the optimum number of fins for this case. Also, friction factor increased with a decrease in the bypass flow area or inter-fin distance spacing and using perforated fins reduced the pressure losses and thermal resistance for all studied cases. List of symbolsD hd Duct hydraulic diameter (m) E Total energy per unit mass (J/kg) H Fin height (m) L Heat sink foot print length (m) N Number of fins P 1 Channel inlet pressure (N/m 2 ) P L Non-dimensional pitch = (a ? b)/a Q Heat input (W) R th Total thermal resistance (K/W) Re D Reynolds number using D h V d Duct velocity (m/s) S g Entropy generation minimization h Heat transfer coefficient (W/m 2 K) b Fin spacing (m) a Fin side thickness (m) y ?Dimensionless wall distanceGreek symbols e Turbulent dissipation rate (m 2 /s 5 ) lAbsolute viscosity (Pa s) bOpen area ratio (%) qDensity (kg/m 5 ) DP Pressure drop across heat sink (N/m 2 )

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“…While the studies regarding circular pin-fin arrays are abundant, the research on pin fins with other cross-section is relatively sparse [7][8][9][10]. Sara [7] presented the heat-transfer and friction characteristics and performance analyses of convective heat transfers through a rectancular channel with square cross-section pin-fins attached to a flat surface.…”

Section: Introductionmentioning

confidence: 98%

“…By employing the heat/mass transfer analogy and the naphthalene sublimation technique, the mean heat-transfer coefficients for pin fins and the endwall (base plate) of the channel were presented. Chen et al [10] determined the convective heat-transfer and pressure-loss characteristics in rectangular channels with staggered arrays of drop-shaped pin-fins in a crossflow of air. They showed that heat transfer of a channel with drop-shaped pin-fins is higher than that with circular pin fins while the resistance of the former is much lower than that of the latter in the Reynolds number range from 900 to 9000.…”

Section: Introductionmentioning

confidence: 99%