An estimation of the optimum shape and perforation diameters for pin fin arrays

Cheng-Hung Huang, Min Hong Chen

Research output: Contribution to journalArticle

Abstract

A pin fin array design problem is studied in the present work using the Levenberg-Marquardt method (LMM) and a commercial package CFD-ACE+ to estimate the optimal shape and perforation diameters of a perforated pin fin array module based on the desired temperature difference between the average temperature of the base plate and ambient temperature (ΔT). In addition to the perforation diameters, in this study, the height and diameter of the pin fin are also considered design variables under a fixed fin volume constraint, and it is determined that a significant improvement in the heat dissipation performance can be achieved. The results of the numerical design cases show that the height of the estimated pin fin becomes shorter, and the diameter of pin fin and perforation become larger than the original design for various cases considered in this work. At an inlet velocity equal to 5.2 m/s, the Nusselt numbers increase from 25.9% to 28.0%, and the average base plate temperatures decrease from 20.2% to 21.5% when compared with the original design of the perforated fin array. Finally, experimental verifications are performed on the fabricated pin fin modules. The measurement results illustrate that the experimental data are in good agreement with the numerical temperature distributions on those pin fin arrays.

LanguageEnglish
Pages72-84
Number of pages13
JournalInternational Journal of Heat and Mass Transfer
Volume131
DOIs
Publication statusPublished - 2019 Mar 1

Fingerprint

perforation
fins
Temperature
Nusselt number
Heat losses
modules
Computational fluid dynamics
Temperature distribution
charge flow devices
ambient temperature
temperature gradients
temperature distribution
cooling
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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title = "An estimation of the optimum shape and perforation diameters for pin fin arrays",
abstract = "A pin fin array design problem is studied in the present work using the Levenberg-Marquardt method (LMM) and a commercial package CFD-ACE+ to estimate the optimal shape and perforation diameters of a perforated pin fin array module based on the desired temperature difference between the average temperature of the base plate and ambient temperature (ΔT). In addition to the perforation diameters, in this study, the height and diameter of the pin fin are also considered design variables under a fixed fin volume constraint, and it is determined that a significant improvement in the heat dissipation performance can be achieved. The results of the numerical design cases show that the height of the estimated pin fin becomes shorter, and the diameter of pin fin and perforation become larger than the original design for various cases considered in this work. At an inlet velocity equal to 5.2 m/s, the Nusselt numbers increase from 25.9{\%} to 28.0{\%}, and the average base plate temperatures decrease from 20.2{\%} to 21.5{\%} when compared with the original design of the perforated fin array. Finally, experimental verifications are performed on the fabricated pin fin modules. The measurement results illustrate that the experimental data are in good agreement with the numerical temperature distributions on those pin fin arrays.",
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An estimation of the optimum shape and perforation diameters for pin fin arrays. / Huang, Cheng-Hung; Chen, Min Hong.

In: International Journal of Heat and Mass Transfer, Vol. 131, 01.03.2019, p. 72-84.

Research output: Contribution to journalArticle

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