Constructal design of T–Y assembly of fins for an optimized heat removal

Lorenzini, Giulio; Rocha, Luíz Alberto Oliveira

doi:10.1016/j.ijheatmasstransfer.2008.09.007

Cited by 103 publications

(53 citation statements)

References 11 publications

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“…Hazarika et al revealed analytical solution to predict optimum design parameter of Constructal T-shaped fin for heat and mass transfer (condensation of moisture) [13]. The current literature also documents various T-and Y-shaped fin geometries corresponding to the minimum resistance to the heat flow relative to the different boundary conditions and constraints [14][15][16]. Furthermore, the effect of the inverted fins (cavities filled with high-conductivity inserts) on the maximum temperature and heat transfer rate were documented in the literature [17,18].…”

Section: Introductionmentioning

confidence: 99%

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

Çetin¹,

Çetkin²

2017

IJHT

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In this study, authors show that maximum excess temperature on a heat generating cylindrical solid domain can be minimized with numerically optimized rectangular cavities and T-shaped fins. The effect of the cavities and the fins on overall thermal resistances were compared while their volume fraction in a unit volume element is fixed. Furthermore, the designs correspond to the minimum thermal resistance were uncovered for two types of flows; parallel and cross-flow. The governing equations of the heat transfer and the fluid flow were solved simultaneously in order to show the effects of design on the flow characteristics and the thermal performance. Two-dimensional solution domain was used to uncover the thermal performance in cross-flow case because the flow direction is perpendicular to the heat transfer surface area of the heat generating domain. However, three-dimensional domain was used in parallel flow case because the fluid flows along the outer surface of the heat generating domain. For the cross-flow case, the results show that T-shaped assembly of fins with longer stem and shorter tributaries correspond to the lower peak temperature. In addition, the results also show that there is an optimal cavity shape that minimizes the peak temperature. This optimal shape becomes thinner when the number of the cavities increase. In parallel flow case, fins with thicker and shorter stem and longer tributaries correspond to the minimum excess temperature. In addition, the longer and thinner cavities increase the thermal performance in parallel flow case.

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Section: Introductionmentioning

confidence: 99%

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

Çetin¹,

Çetkin²

2017

IJHT

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“…With such a diverse range of engineering applications, there is an increasing demand for optimal performance according to a particular function (see ref. [5][6][7][8][9][10][11][12][13][14][15] for example). A correctly-operated system, while important, provides no assurance that energy savings will be attained if the system is not properly designed [4].…”

Section: Introductionmentioning

confidence: 99%

An analytical approach for optimal design of heat sinks under forced convection

Miguel

2013

Open Engineering

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Saving energy is just as important as generating energy. In this paper, we seek an optimized structure that achieves a certain level of heat transfer rate under a minimum pumping power to drive the fluid stream. Constraints are specified by the flow regime (laminar and turbulent), admissible boundary conditions on the walls (prescribed temperature and constant heat flux), and design standards. The study will help designers with more effective basic tools for the conceptual design of system and in establishing proper operating procedures.

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“…Lorenzini and Rocha (15) conducted a numerical study to compare the performance of Y-shaped assembly of fins with the one presented by the T-shaped assembly of fins and revealed the superiority of utilizing the Y-shaped structure that T-shaped one. Recently, Lorenzini and Rocha (16) have carried out a numerical work to seek for the best geometry of a T-Y assembly of fins, i.e., an assembly where there is a cavity between the two branches of the assembly of fins. Hot spot temperature of the fin was minimized by geometric optimization subject to the fixed total volume, fixed volume of fin-material, and the fixed volume of the cavity.…”

Section: Introductionmentioning

confidence: 99%

“…These observations obviously have motivated us to study the combined effect of radiation and convection on the design of a most recently proposed assembly of fins, namely, T-Y shaped assembly of fins. The evolution of fin shapes from rectangular shape (4) toward T-Y shape (16) is important in constructal design, because the newer shapes allow the structure to "fill better'' its allotted volume (1)- (3) . Filling volumes in an optimal way (with objective, or purpose, relative to the use of volume-to-point flows) is the essence of the constructal method (1)- (3) .…”

Section: Introductionmentioning

confidence: 99%

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Radiation Effect on Constructal Design Analysis of a T-Y-Shaped Assembly of Fins

Hajmohammadi

Poozesh

Hosseini

2012

JTST

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In the actual design circumstances, the radiation effect on the cooling performance of the extended surfaces must be taken into consideration. The central goal of this paper is to design the constructal architecture of a T-Y shaped assembly of fins by incorporating the thermal radiation with convection heat transfer. Our motivation in selecting a T-Y shaped assembly of fins is that the so-called assembly is of more cooling performance among the other shapes according to the literature. The temperature field and the peak temperature (hot spot) are calculated from a numerical approach based on finite element method. The peak temperature is minimized by manipulating the geometry of the assembly regarding the constraints of space and materials. A comparative study is executed among the present work and the published work. The comparison revealed that although the optimized geometry is approximately independent of the heat transfer mechanism, the hot spot temperature can be affected when the finned surfaces are exposed to thermal radiation in addition to convection. This issue is more pronounced when the emissivity of the finned surfaces is higher in comparison with the convection heat transfer coefficient.

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Constructal design of T–Y assembly of fins for an optimized heat removal

Cited by 103 publications

References 11 publications

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

The effect of cavities and T-shaped assembly of fins on overall thermal resistances

An analytical approach for optimal design of heat sinks under forced convection

Radiation Effect on Constructal Design Analysis of a T-Y-Shaped Assembly of Fins

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