Analysis and optimization of electrokinetic microchannel heat sink

Afzal Husain, Kwang Yong Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A mixed (electroosmotic and pressure-driven) flow microchannel heat sink has been studied and optimized with the help of three-dimensional numerical analysis, surrogate methods, and the multi-objective evolutionary algorithm. Two design variables; the ratio of the microchannel width-to-depth and the ratio of fin width-to-depth of the microchannel are selected as the design variables while design points are selected through a four-level full factorial design. The single-objective optimization is performed taking overall thermal resistance as the objective function and Radial Basis Neural Network as the surrogate model while for multi-objective optimization pumping power is considered as the objective function along with the thermal resistance. It is observed that the optimum design shifted towards the lower values of the ratio of the channel width-to-depth and the higher values of the ratio of fin width-to-depth of channel with increase of the driving source. The trade-off between the two conflicting objectives has been found and discussed in detail in light of the distribution of Pareto-optimal solutions in the design space. The ratio of channel width-to-depth is found to be higher Pareto-sensitive (sensitivity along the Pareto-optimal front) than the ratio of fin width-to-depth of the channel.

Original languageEnglish
Pages (from-to)5271-5275
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume52
Issue number21-22
DOIs
Publication statusPublished - Oct 2009

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Keywords

  • Electroosmosis
  • Microchannel heat sink
  • Numerical simulation
  • Optimization
  • Pareto-optimal front
  • Thermal resistance

ASJC Scopus subject areas

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

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