Additive manufacturing of pyramidal pin fins: Height and fin density effects under forced convection

Cormier, Yannick; Dupuis, Philippe; Farjam, Aslan; Corbeil, Antoine; Jodoin, B.

doi:10.1016/j.ijheatmasstransfer.2014.03.053

Cited by 64 publications

(17 citation statements)

References 28 publications

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“…The results showed that the radius of bubble detachment increases with increasing heat flux. Cormier et al 10 used an additive manufacturing technique to make pyramidal pin fins and observed the effects of fin height and density under forced convection. The results revealed that the increment in fin height was followed by a corresponding increase in fin density.…”

Section: Experimental Studiesmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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Fins or extended surfaces are generally used in heat exchangers to enhance heat transfer between the main surface and ambient fluid. Various types of simple-shaped fins, namely, rectangular, square, annular, cylindrical, and tapered, have been used with different geometrical combinations. To satisfy industrial demand, different trials have also been carried out for designing optimized fins. The optimization of fins can be performed either by enhancing heat dissipation at an exact fin weight or by diminishing the weight of the fin by precise heat dissipation. Recently a notable amount of work on some typical fins, like, porous fins and perforated fins, has also been carried out. This paper presents a brief review on heat transfer enhancement using fins of different types considering variable thermophysical and geometric parameters, which will also be useful for future use of geometrical modifications of extended surfaces, based on the cost and availability of space.analytical approach, computational approach, experimental approach, perforated fin, porous fin | INTRODUCTIONAdvanced technologies need high-performance heat transfer equipment. Techniques for enhancing the heat transfer rate are classified into two categories: active and passive methods. In the design point of view, active methods are complex as they require some extraneous power input for necessary flow adjustments and to improve the heat transfer rate and thus applications are limited. On the other hand, passive methods require geometrical or surface adjustments to the flow passage by incorporating additional devices. Additionally, by interrupting or varying the existing flow behavior (except for extended surfaces); higher heat transfer coefficients are promoted through this method, which is also followed by an increase in the corresponding pressure drop. The amount of conduction, convection, and radiation of an object shows the amount of heat it transfers. The heat transfer rate is enhanced by increasing the temperature difference between the object and the environment or by enhancing the coefficient of convective heat transfer or by maximizing the surface area of the body. In some cases, it is not appropriate or cost effective to alter the first two options. Introducing a fin to a body, however, expands the surface area and sometimes this is a cost-effective solution for heat transfer problems. Extended surfaces or fins are illustrations of passive methods that are generally used in different industrial applications for the enhancement of heat transfer between the primary surface (heat sink) and the surrounding fluid. Currently reducing the cost and size of fins is the key target of the fin industry. This demand is generally met by the high-thermal-conductivity and costly metals used to fabricate finned surfaces. Many efforts have been made to construct optimized fins. (a) By changing the size and shape of the solid fin: Instead of a longitudinal rectangular solid fin, if the geometry of fin design is changed, the performance parameters and heat tr...

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Section: Experimental Studiesmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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“…A significant amount of work has been performed on WMHE as well as the production of pyramidal pin fins produced by additive manufacturing cold spray process [7][8][9], [23], [25], [60][61][62]. The thermal performance enhancement of heat exchanger surfaces by additive manufacturing of fins using the cold spray technique (as illustrated in Figure 2.17) is an innovative idea for which limited investigation work has been done.…”

Section: Figure 217 Wire Mesh Heat Exchanger With Fins Produced By Cmentioning

confidence: 99%

“…This can be achieved by the addition of fins to the outer walls where the heat of the CHE's core will be conducted to the outer layers. These fins can be manufactured with the aid of cold spray [7][8][9]. For the various applications of CHEs, different types of feedstock powder materials can be deposited.…”

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confidence: 99%

Influence of Alumina Addition to Aluminum Fins for Compact Heat Exchangers Produced by Cold Spray Additive Manufacturing

et al. 2015

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Aluminum and aluminum-alumina powder mixtures were used to produce pyramidal fin arrays on aluminum substrates using cold spray as an additive manufacturing process. Using aluminum-alumina mixtures instead of pure aluminum powder could be seen as a costeffective measure, preventing nozzle clogging. The fin geometries that were produced were observed using a 3D digital microscope to determine the flow passages width and fins geometric details. Heat transfer and pressure tests were carried out using different ranges of appropriate Reynolds numbers for the sought commercial application to compare each fin array and determine the effect of alumina content. It was found that the presence of alumina reduces the fins' performance when compared to pure aluminum but that they still outperform traditional fins. Numerical simulations were performed and were used to explain

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“…Masked Cold Gas Dynamic Spray (MCGDS) has been recently developed as a new additive manufacturing technique to build periodically repetitive structures such as pin fin arrays and has been proven to be a viable alternative in compact heat exchanger applications ( Ref 19,23,24). The performance of pin fin arrays produced using this process has been characterized and found superior to those of conventional plain fin arrays of similar dimensions (Ref 19,23).…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and Failure Mode Characterization of Pyramidal Fin Arrays Produced by Masked Cold Gas Dynamic Spray

et al. 2015

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This work evaluates the shear strength of pyramidal fin arrays made from various feedstock materials (cylindrical aluminum, spherical nickel, and cylindrical stainless steel 304 powders) deposited on an Al6061-T6 substrate. Higher shear strength was measured for the nickel fin array followed by the stainless steel 304 and the aluminum arrays. Different failure modes were observed by inspecting the fracture surfaces under Scanning Electron Microscope. Deposition between the cold sprayed nickel and stainless fins was detected whereas dimples were noticed on the substrate between the fins when aluminum is used as the feedstock material. A numerical simulation of normal and angled impacts using the high strain rate Preston-Tonks-Wallace model was carried out in order to have a better understanding of the experimental results. The equivalent plastic strain (PEEQ) obtained from the finite element analysis at normal impact correlates with the different shear strengths measured experimentally. Furthermore, even if a higher PEEQ was observed for angled impacts compared to its normal collision counterpart, it is suggested that the particles may not bond because of the rotational restitution momentum caused by the tangential friction generated during angled impacts. This rotational restitution momentum was not detected for particle impacts normal to the substrate surface.

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Additive manufacturing of pyramidal pin fins: Height and fin density effects under forced convection

Cited by 64 publications

References 28 publications

Improvement of heat transfer through fins: A brief review of recent developments

Improvement of heat transfer through fins: A brief review of recent developments

Influence of Alumina Addition to Aluminum Fins for Compact Heat Exchangers Produced by Cold Spray Additive Manufacturing

Finite Element Analysis and Failure Mode Characterization of Pyramidal Fin Arrays Produced by Masked Cold Gas Dynamic Spray

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