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Developing a metamodel based upon the DOE approach for investigating the overall performance of microchannel heat sinks utilizing a variety of internal fins

Hosseinpour, V ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijheatmasstransfer.2019.119219
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. In this study, the effects of geometry and operating conditions upon the thermal and hydraulic performance of Finned Microchannel Heat Sink (FMCHS) were investigated. Water and aluminum were considered as fluid and solid for the computational domain (30 mm × 0.8 mm × 0.8 mm). The Microchannel (MC) was supposed to have 0.65 mm height with an aspect ratio of 0.5. CFD analysis was applied for the assessments of four-types of micro-fins (i.e., conical, pyramidal, cylindrical and cubical). In order to evaluate the effects of height, diameter, the spacing of fins and Reynolds number on the overall performance of FMCHS, central composite design at five levels was used to generate design points. Metamodels for pressure-drop, Nusselt number and overall thermal-resistance for all types of FMCHS were generated and statistically tested. The results showed that Re was the most effective parameter for the conical- and pyramidal-FMCHS. For cylindrical-FMCHS, the fins diameter and Re demonstrated the most significant effects. For cubical-FMCHS, fins diameter obtained the first rank. The overall performance of FMCHS types was evaluated by thermal-resistance vs. pumping power. In comparison to the conical-, cylindrical-, and cubical-FMCHS, the MC with pyramid-fins had 5, 10, and 17% less thermal-resistance, respectively. Ultimately, the pyramidal-fins owned the best overall performance. © 2019
  6. Keywords:
  7. Experimental Design ; Finned Microchannel Heat Sink (FMCHS) ; Heat Transfer Enhancement ; Aspect ratio ; Computational fluid dynamics ; Design of experiments ; Heat transfer ; Microchannels ; Reynolds number ; Central composite designs ; Computational domains ; Effective parameters ; Heat Transfer enhancement ; Metamodeling ; Micro channel heat sinks ; Overall thermal resistance ; Thermal and hydraulic performance ; Fins (heat exchange)
  8. Source: International Journal of Heat and Mass Transfer ; Volume 149 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0017931019331126