Constructal design of heat sources with different heat generation rates for the hot spot mitigation

BİRİNCİ S., SAĞLAM M., Sarper B., AYDIN O.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, cilt.163, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 163
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.ijheatmasstransfer.2020.120472
  • Dergi Adı: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Anahtar Kelimeler: Constructal law, Heat generation ratio, Dimensionless global conductance, Hot spot temperature, Average nusselt number, Mixed convection, OPTIMUM SPACING PROBLEM, MIXED-CONVECTION, FORCED-CONVECTION, HORIZONTAL CHANNEL, SURFACE RADIATION, SOURCE ARRAY, PLACEMENT, BLOCKS, PLATE, ENHANCEMENT
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

This work aims to determine the optimum heat generation ratio among discrete heat sources generating different amounts of heat in order to mitigate the hot spot. Six different heat generation ratios are considered by following the constructal design method. For comparison, the average and total heat sources' heat generation rates are kept equal for every examined cases. Meanwhile, Reynolds number ranges from 792 to 3962. All the three heat transfer mechanisms are taken into account with an integrated approach to calculate precisely the dimensionless global conductance of the IC pack. Three dimensional simulations are done with ANSYS Fluent while measuring surface temperatures in experiments. The output parameters of the study are the surface and hot spot temperatures, Nusselt number and dimensionless global conductance change with Reynolds number and heat generation ratio. It is disclosed that relative decreasing heat generation rates are convenient for hot spot mitigation. (C) 2020 Elsevier Ltd. All rights reserved.