Effects of Perforations on the Thermal and Fluid Dynamic Performance of a Heat Exchanger

Ismail, Farhad

doi:10.1109/tcpmt.2013.2240766

Cited by 18 publications

(12 citation statements)

References 29 publications

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“…(1) (2) The air flow is considered as steady state, incompressible and turbulent, see e.g. [11][12][13], and the conjugate heat transfer model analyses the heat flux which is transferred through the heat sink into the moving air through the coupled boundary condition shown in Fig. 3(a).…”

Section: Problem Descriptionmentioning

confidence: 99%

“…They found that perforations reduce the pressure loss by reducing the size of the wakes behind the fins and the length of the recirculation zone around the lateral surface of the fins, whereas air jets through the perforations generally enhance the heat transfer rate. Ismail et al [13] also found that the shape of the perforations can be influential and that the pressure drop with circular perforations is substantially smaller than with square ones.…”

Section: Introductionmentioning

confidence: 98%

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A numerical investigation of thermal airflows over strip fin heat sinks

Al-Sallami

Al‐damook

Thompson

2016

International Communications in Heat and Mass Transfer

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The benefits of using strip fin heat sinks (SFHSs) where the cross-sectional aspect ratio of the fins lie between those for plate fins (high aspect ratio) and pins fins (aspect ratio ) are explored computationally, using a conjugate heat transfer model. Results show that strip fins provide another effective means of enhancing heat transfer, especially when staggered arrangements of strip fins are used. A detailed parameter investigation demonstrates that perforating the strip fins provide additional improvements in terms of enhanced heat transfer, together with reduced pressure loss and heat sink mass. Results are also given which show that, for practical applications in micro-electronics cooling, perforated SFHSs offer important benefits as a means of achieving smaller processor temperatures for reduced mechanical power consumption.

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Section: Problem Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

A numerical investigation of thermal airflows over strip fin heat sinks

Al-Sallami

Al‐damook

Thompson

2016

International Communications in Heat and Mass Transfer

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“…Most studies have examined the benefits of perforating plate fins. Shaeri & Yaghoubi [15,16] and Shaeri & Jen [17,18], for example, studied the effect of the number of perforations and their size, while Farhad Ismail et al [19,20] considered the influence of perforation shape, on heat transfer and frictional drag on the air for both laminar and turbulent flow cases. Shaeri & Jen [17,18], for example, found that a single perforation in a plate fin could increase the heat transfer rate by up to 80%.…”

Section: Introductionmentioning

confidence: 99%

An experimental and computational investigation of thermal air flows through perforated pin heat sinks

Al‐damook

Kapur

Summers

et al. 2015

Applied Thermal Engineering

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“…For simultaneous assessment of the enhancement in heat transfer and frictional losses, a parameter called Heat Transfer Performance Enhancement ( η ) suggested by Ismail can be described as:

η = (\frac{Q_{pf}}{{normalQ}_{sf}}) / {((), \frac{f_{pf}}{f_{sf}})}^{1 / 3} .

…”

Section: Numerical Investigationmentioning

confidence: 99%

Heat Transfer and Friction Characteristics of Perforated Fin with a Longitudinal Slot under Forced Convection

Rawat

Patil

2014

Heat Trans. Asian Res.

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Extended surfaces are used in a variety of heat transfer applications owing to their ability in reducing the convection resistance by exposing a large surface area to the surrounding fluid. Surface modification in the form of perforations is a passive method of increasing the heat transfer rates with the additional benefit of weight reduction. This work deals with numerical investigation of heat transfer and friction from a perforated fin (with and without slot) subjected to forced convection. The perforated fin with slot has been found to have a maximum enhancement in heat transfer with the simultaneous increase in frictional losses versus that of a solid fin. Further, the perforated fin without slot has been able to transfer heat at a relatively higher rate with a considerable reduction in energy loss due to friction in comparison to a solid fin. C⃝

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Effects of Perforations on the Thermal and Fluid Dynamic Performance of a Heat Exchanger

Cited by 18 publications

References 29 publications

A numerical investigation of thermal airflows over strip fin heat sinks

A numerical investigation of thermal airflows over strip fin heat sinks

An experimental and computational investigation of thermal air flows through perforated pin heat sinks

Heat Transfer and Friction Characteristics of Perforated Fin with a Longitudinal Slot under Forced Convection

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