Bilgisayarların Sıvı Soğutma Sistemlerinde Kanatçıklar Arası Mesafenin (KAM) Ortalama Mikro Kanatçık Sıcaklığına (OMKS) Etkisinin Sonlu Hacimler Analizi ile Optimizasyonu

Öz

Teknolojinin ilerlemesiyle birlikte hemen her alanda kullanılan bilgisayarların yüksek performansta uzun süre çalışması oldukça önem arz etmektedir. Bilgisayar sistemlerinde performansı en çok etkileyen birimlerden biri olan merkezi işlem biriminin çalışma sıcaklığı performansına doğrudan etki etmektedir. Artan soğutma ihtiyaçlarına geleneksel hava soğutma sistemlerinin cevap verememesinden dolayı sıvı soğutma tabanlı sistemler endüstride yaygınlaşmaktadır. Gelişen simülasyon yazılımları, tasarlanan ürünün prototipini üretmeden sanal ortamda testlerini zamandan ve prototip maliyetlerinden tasarruf ederek gerçekleştirme olanağı sunmaktadır. Bu çalışma kapsamında merkezi işlem birimlerinin soğutulması için kullanılan sıvı soğutma sistemlerinin bir bileşeni olan mikrofinin sanal ortamda hesaplamalı akışkanlar dinamiği (HAD) yöntemi kullanılarak akış simülasyonları gerçekleştirilmiştir. Bu simülasyonlar gerçekleştirilirken mikrofinin ısıtma performansını doğrudan etkileyen finler arası mesafe (FAM: 0.1, 0.2, 0.3 mm) parametresi referans alınmıştır. Gerçekleştirilen sonlu hacimler analizi sonucunda ortalama mikrofin sıcaklığı (OMS) incelenmiştir. Akış simülasyonları sonucunda FAM’ın artmasıyla birlikte OMS’nin de arttığı gözlemlenmiştir.

Anahtar Kelimeler

• Sıvı soğutma
• Simülasyon
• Bilgisayar
• Mikro kanatçık
• Sonlu hacimler analizi

Optimization of the Effect of Distance Between Fins (DBF) on Average Heatsink Temperature (AHT) in Liquid Cooling Systems of Computers by Finite Volume Analysis

Öz

With the advancement of technology, it is very important for computers used in almost every field to work at high performance for a long time. The operating temperature of the central processing unit (CPU), which is one of the units that most affect performance in computer systems, directly affects its performance. Liquid cooling-based systems are becoming widespread in the industry due to the inability of traditional air-cooling systems do not respond to increasing cooling needs. Developing simulation software offers the opportunity to perform tests in a virtual environment without producing a prototype of the designed product, saving time and prototype costs. In the scope of this study, flow simulations were carried out using finite volume analysis method in virtual environment of heatsink which is a component of liquid cooling systems used for cooling processors. While performing these simulations, the distance between the fins (DBF: 0.1mm, 0.2mm, 0.3mm) parameter, which directly affects the cooling performance of the heatsink, was taken as reference. As a result of the finite volume analysis performed, the average heatsink temperature (AHT) was investigated. As a result of flow simulations, it was seen that AHT increased with the increase of DBF. It was observed that when the DBF was 0.1mm, 0.2mm and 0.3mm, the AHT were 28.93°C, 29.39°C, 30.24°C, respectively.

Anahtar Kelimeler

• Computer
• Liquid cooling
• Heatsink
• Finite volume analysis
• Simulation

Kaynakça

1. 1. S. H., Wang, G. Y. Lee, W. Z. Wang, Z. Y. Wang, C. S. Tsai, An innovative active liquid heat sink technology for CPU cooling system, 8th International Conference on Electronic Packaging Technology, IEEE, 2007.
2. 2. J. Choi, M. Jeong, J. Yoo, M. Seo, A new CPU cooler design based on an active cooling heatsink combined with heat pipes, Applied Thermal Engineering, 44: 50-56, 2012.
3. 3. J.Khan, S.A. Momin, M. Mariatti, A review on advanced carbon-based thermal interface materials for electronic devices, Carbon, 168: 65-112, 2020.
4. 4. S. Lee, Optimum design and selection of heat sinks, IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part A, 18: 812-817, 1995.
5. 5. A. Bar-Cohen, M. Iyengar, A.D. Kraus, Design of optimum plate-fin natural convective heat sinks, Journal of Electronic Packaging, 125 (2): 208-216, 2003.
6. 6. R. Mohan, P. Govindarajan, Experimental and CFD analysis of heat sinks with base plate for CPU cooling, Journal of Mechanical Science And Technology, 25(8): 2003-2012, 2011.
7. 7. R. Mohan, P. Govindarajan, Thermal analysis of CPU with variable heat sink base plate thickness using CFD, International Journal of the Computer, The Internet and Management, 18: 27-36, 2010.
8. 8. B. Freegah, A.A. Hussain, A.H Falih, H. Towsyfyan, CFD analysis of heat transfer enhancement in plate-fin heat sinks with fillet profile: Investigation of new designs, Thermal Science and Engineering Progress, 17: 100458, 2020.

9. 9. E.Ozturk, I. Tari, Forced air cooling of CPUs with heat sinks: A numerical study, IEEE Transactions on Components and Packaging Technologies, 31(3): 650-660, 2008.
10. 10. H.H. Hu, Computational fluid Dynamics, Fluid Mechanics. Academic Press, 421-472, 2012.
11. 11. A. Thom, The flow past circular cylinders at low speeds, Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 141(845): 651-669, 1933.
12. 12. M. Kawaguti, Numerical solution of the Navier-Stokes equations for the flow around a circular cylinder at Reynolds number 40, Journal of the Physical Society of Japan, 8(6): 747-757, 1953.
13. 13. D. Kuzmin, Introduction to computational fluid Dynamics, University of Dortmund, Dortmund, 2004.
14. 14. F. Moukalled, L. Mangani, M. Darwish, The finite volume method, The Finite Volume Method in Computational Fluid Dynamics, 103-135, 2016.
15. 15. Y.A. Çengel, J.M. Cımbala, Akışkanlar Mekaniği Temelleri ve Uygulamaları, Palme Yayıncılık, 122-123, 2004.
16. 16. W.M. Silver, On the equivalence of Lagrangian and Newton-Euler dynamics for manipulators, The International Journal of Robotics Research, 1(2): 60-70, 1982.
17. 17. G. Qiu, S. Henke, J. Grabe, Application of a Coupled Eulerian–Lagrangian approach on geomechanical problems involving large deformations, Computers and Geotechnics, 38(1): 30-39, 2011.
18. 18. E. Gücüyen, R.T. Erdem, Kompozit deniz yapısının dalga kuvvetleri altında incelenmesi, Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, 10(3): 1125-113, 2019.