THE BEHAVIOR OF HEAT SINK-IMPINGEMENT COOLING WITH FLAT PLATE AND ARCED FINS MODELS

In this paper, a statistical analysis was applied to the numerical predictions of temperature distribution for the heat sinks. There are two types of heat sink with an array of impingement. The first type is a flat plate heat sink, and the second type is arcs-fins heat sinks. The second type category considers five models (A, B, C, D, and E). The shapes of fins were changed, but the thickness, distance between fins, and radius were held fixed for comparing and analyzing them depending upon the improvement of the fin geometry of heat sink. The heat sinks of the two types are subjected to multi impinging flow at different Reynolds numbers (7000-11000). Thermodynamic and hydraulic results were collected. The best model was calculated through a statistical analysis. The efficiency of an arcs-fin heat sink was superior to that of the flat plate heat sink. The findings of Model D were more appropriate than those of the other models. The concave arc near the heat sink's exit (model D) created better effect than the convex arc (model E), despite the fact that the (model D) shape fins being identical to (model E) shape fins (only rotated 180° at the same location). However, Descriptive Statistics manifested that in all situations, the mean temperature for (model D) is better than (model E). The results of comparison between the flat plate heat sink and models (D and E) evinced that the average heat sink temperature in the suggested design reduced via 12%, 8%, while the (model E) decreased by 12%, 7% for Re (7000, 9000), respectively. In addition, the two models maintained the same percentage of (8% and 7%) improvement at Re (11000). The correlation coefficient between the flat plate and the arcs-fins heat sink for model B has the highest value (0.809), while model A has the lowest value of correlation (0.673).

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Thermal Performance Evaluation of Friction Stir Welded Flat Plate Heat Sink Using CFD Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.505 ◽

2015 ◽

Vol 787 ◽

pp. 505-509

Author(s):

A.K. Lakshminarayanan ◽

M. Suresh

Keyword(s):

Flat Plate ◽

Heat Sink ◽

High Efficiency ◽

Base Plate ◽

Software Tool ◽

Cover Plate ◽

Air Cooling ◽

Cooling Systems ◽

Plate Heat ◽

Friction Stir

In an era of compact cooling requirements, where air cooling systems seem to be ineffective and consistently, being replaced by liquid cooled systems, with greater watt density heat energy dissipation. Such cooling systems must work with good quality enabling high efficiency. Hence, an attempt is made to fabricate an aluminum alloy based flat plate heat sink with cover and base plate using friction stir welding. The base plate is machined to obtain channels for fluid flow and the cover plate is fitted in the base plate and welded. Two such configurations of these heat sinks were fabricated with varying channel lengths and number of channels. The flow characteristics of the model for these configurations were analyzed numerically using computational fluid dynamics (CFD) software tool, ANSYS fluent 14.

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Optimization of flat plate heat sink using genetic algorithm

2011 1st International Conference on Electrical Energy Systems ◽

10.1109/icees.2011.5725306 ◽

2011 ◽

Cited By ~ 5

Author(s):

S. Manivannan ◽

S. Prasanna Devi ◽

R. Arumugam

Keyword(s):

Genetic Algorithm ◽

Flat Plate ◽

Heat Sink ◽

Plate Heat

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Design, And Manufacturing A Small-scale Wind Tunnel for Heat Transfer Analysis of Flat Plate And Finned Plate Heat Sinks

The Journal of The University of Duhok ◽

10.26682/csjuod.2020.23.2.54 ◽

2020 ◽

Vol 23 (2) ◽

pp. 693-706

Author(s):

Arkan Saeed ◽

◽

Oday Abbo ◽

Keyword(s):

Heat Transfer ◽

Wind Tunnel ◽

Flat Plate ◽

Heat Sinks ◽

Heat Transfer Analysis ◽

Small Scale ◽

Plate Heat ◽

Design And Manufacturing

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Thermally Optimum Natural Convection Cooled Longitudinal-Plate Heat Sinks With Horizontal Base Plates

10.1115/imece2001/htd-24375 ◽

2001 ◽

Author(s):

K. K. Sikka ◽

C. George

Keyword(s):

Natural Convection ◽

Heat Sink ◽

Base Plate ◽

Heat Sinks ◽

Geometrical Parameters ◽

Plate Heat ◽

Horizontal Orientation ◽

Fin Spacing ◽

Base Plates ◽

Weakly Dependent

Abstract Longitudinal-plate fin heat sinks are optimized under natural convection conditions for the horizontal orientation of the heat sink base plate. The thermal performance of the heat sinks is numerically modeled. The fin height, thickness and spacing and heat sink width are systematically varied. The numerical results are validated by experimentation. Results show that the thermal resistance of a heat sink minimizes for a certain number of fins on the base plate. The fin spacing-to-length ratio at which the minimum occurs is weakly dependent on the fin height and thickness and heat sink width. The flow fields reveal that the minimum occurs for the heat sink geometry in which the number of fins are maximized such that the flow velocity as the air exits the fins is fully developed. A correlation of the heat transfer with the heat sink geometrical parameters is also developed.

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The Cooling of Electronic Components with Flat Plate Heat Sinks

Cooling of Electronic Systems ◽

10.1007/978-94-011-1090-7_19 ◽

1994 ◽

pp. 391-414 ◽

Cited By ~ 1

Author(s):

Robert J. Krane ◽

Iqballudin Ahmed ◽

J. Roger Parsons

Keyword(s):

Flat Plate ◽

Heat Sinks ◽

Electronic Components ◽

Plate Heat

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Integration of a Pulsating Heat Pipe in a Flat Plate Heat Sink

ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels ◽

10.1115/icnmm2014-21233 ◽

2014 ◽

Author(s):

Mitchell P. Hoesing ◽

Gregory J. Michna

Keyword(s):

Thermal Resistance ◽

Flat Plate ◽

Heat Pipe ◽

Heat Sink ◽

New Technologies ◽

Operating Conditions ◽

Working Fluid ◽

High Heat Flux ◽

Pulsating Heat Pipe ◽

Plate Heat

The ongoing development of faster and smaller electronic components has led to a need for new technologies to effectively dissipate waste thermal energy. The pulsating heat pipe (PHP) shows potential to meet this need, due to its high heat flux capacity, simplicity, and low cost. A 20-turn flat plate PHP was integrated into an aluminum flat plate heat sink with a simulated electronic load. The PHP heat sink used water as the working fluid and had 20 parallel channels with dimensions 2 mm × 2 mm × 119 mm. Experiments were run under various operating conditions, and thermal resistance of the PHP was calculated. The performance enhancement provided by the PHP was assessed by comparing the thermal resistance of the heat sink with no working fluid to that of it charged with water. Uncharged, the PHP was found to have a resistance of 1.97 K/W. Charged to a fill ratio of approximately 75% and oriented vertically, the PHP achieved a resistance of .49 K/W and .53 K/W when the condenser temperature was set to 20°C and 30°C, respectively. When the PHP was tilted to 45° above horizontal the PHP had a resistance of .76 K/W and .59 K/W when the condenser was set 20°C and 30°C, respectively. The PHP greatly improves the heat transfer properties of the heat sink compared to the aluminum plate alone. Additional considerations regarding flat plate PHP design are also presented.

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An Experimental Study of the Enhancement of Air-Cooling Limits for Telecom/Datacom Heat Sink Applications Using an Impinging Air Jet

Journal of Electronic Packaging ◽

10.1115/1.2164848 ◽

2005 ◽

Vol 128 (2) ◽

pp. 166-171 ◽

Cited By ~ 11

Author(s):

Eric Sansoucy ◽

Patrick H. Oosthuizen ◽

Gamal Refai-Ahmed

Keyword(s):

Experimental Study ◽

Flat Plate ◽

Heat Sink ◽

Target Surface ◽

Junction Temperature ◽

Air Cooling ◽

Nusselt Numbers ◽

Air Jet ◽

Numerical Predictions ◽

Nozzle Plate

An experimental study was conducted to investigate the heat transfer from a parallel flat plate heat sink under a turbulent impinging air jet. A horizontal nozzle plate confined the target surface. The jet was discharged from a sharp-edged nozzle in the nozzle plate. Average Nusselt numbers are reported for Pr=0.7, 5000⩽Re⩽30,000, L∕d=2.5, and 0.833 at H∕d=3 where L, H, and d define the length of the square heat source, nozzle-to-target spacing, and nozzle diameter, respectively. Tests were also conducted for an impinging flow over a flat plate, flush with the top surface of the target plate. The average Nusselt numbers from the heat sink were compared to those for a flat plate to determine the overall performance of the heat sink in a confined impingement arrangement. The experimental results were compared with the numerical predictions obtained in an earlier study. Although the average Nusselt numbers obtained from numerical simulations differed from the experimental measurements by 18%, the disagreement is much less significant when related to the junction temperature. Under typical conditions, it was shown that such discrepancy in the Nusselt number lead to an error of 6% in the prediction of the junction temperature of the device.

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