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  1. طراحی و بهینه‌سازی عملکرد یک ورودی‌ هوای مافوق صوت بدون فاصله‌انداز
تاثیر فین تیغه ای بر افت فشار و انتقال حرارت در میکروکانال ها
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تاثیر فین تیغه ای بر افت فشار و انتقال حرارت در میکروکانال ها

بهشتی، علیرضا Beheshti, Alireza

Effect of Blade fin on Pressure Drop and Heat Transfer in Microchannels

Beheshti, Alireza | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56032 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Nouri Borujerdi, Ali; Kazemzadeh Hannani, Siamak
  7. Abstract:
  8. Nowadays, the cooling of electronic equipment has become a challenge for designers and scientists due to their progress. One of the most effective solutions for cooling these devices is using microchannel heat sinks. Researchers conducted so many studies experimentally, numerically, or a combination of them to increase the efficiency of microchannel heat sinks. Several methods have been proposed in previous studies to improve the cooling performance, such as using fins, nanoparticles, porous material, etc. Although increasing the heat exchange surface by using fins is caused to increase heat transfer, it also causes an increase in pressure drop. For this reason, researchers are looking for the highest heat dissipation with the lowest pressure drop. Nowadays, many studies have been conducted on using fins with different shapes, such as square, rectangular, cylindrical, triangular, etc. In this study, we will simulate the use of blade fins, a type of rectangular fins, to find the best way of using blade fins to achieve maximum heat transfer with minimum pressure drop. Single-phase liquid water with a temperature of 15 Celsius flows through the copper microchannel, and uniform heat flux in the range of 30 W/cm2 is supplied to heat the microchannel. Nineteen different types of blade fins, such as longitude blade fins, separated blade fins with the aligned and staggered arrangement investigated. The results show that heat transfer increase by increasing the height of the fin up to 80% of the height of the microchannel, while after that, it does not increase much. Using staggered separated blade fins increases the Nusselt number by 144% compared to the unfinned microchannel. The highest thermal performance factor, in this case, is equal to 1.33, which is the highest number obtained in this research. Also, if the distance between the column of fins is three times the thickness of the fin and the distance between the row of fins is equal to the length of the fin, the highest thermal performance coefficient is obtained
  9. Keywords:
  10. Heat Transfer ; Operability Index ; Pressure Drop ; Micro Channels Heat Sink ; Thermal Performance ; Blade Fin

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