Effect of Flow Disturbance Geometry on Thermal Hydraulic Performance of Forced Air-Cooled Heat Sinks for CPU Cooling
DOI:
https://doi.org/10.21070/r.e.m.v11i1.1840Keywords:
Cpu Cooling, Heat sink, TemperatureAbstract
The increasing thermal load in modern electronic devices necessitates efficient and reliable cooling strategies, particularly for air-cooled heat sinks in CPU applications. This study numerically investigates the effect of flow-disturbance geometry on the thermal–hydraulic performance of a forced air-cooled channel under constant heat flux. Three configurations—circular, square, and octagonal—were evaluated against a baseline using a validated CFD approach based on the RANS equations with the k–ω SST model, with a 7.65% deviation. The results show that geometric disturbances significantly influence temperature distribution and pressure drop. The octagonal model achieves the lowest excess temperature across airflow velocities of 1–2 m/s but produces the highest pressure drop, while the square model provides notable temperature reduction with moderate pressure loss by improving airflow uniformity and disrupting the thermal boundary layer. Overall, the square configuration offers the most optimal balance between heat transfer and energy efficiency.
References
[1] T.-Y. Kuo, S.-C. Wong, C.-C. Hsu, and C.-Y. Lu, “Numerical and experimental study on UTVC/plate-fin heatsink modules with an axial impingement fan,” Int. Commun. Heat Mass Transf., vol. 171, p. 110173, 2026.
[2] J. Jiao, Y. Li, L. Gong, and F. Duan, “Enhanced thermal performance of a hybrid air and liquid cooling system for high power data center servers,” Appl. Therm. Eng., vol. 283, p. 128878, 2026, doi: https://doi.org/10.1016/j.applthermaleng.2025.128878.
[3] A. G. Mohammed, H. Hasini, K. E. Elfeky, Q. Wang, M. A. Hajara, and N. I. Om, “Cooling effectiveness enhancement of parallel air-cooled battery system through integration with multi-phase change materials,” Int. J. Therm. Sci., vol. 201, p. 109030, 2024, doi: https://doi.org/10.1016/j.ijthermalsci.2024.109030.
[4] W. Liang et al., “Optimization design of proton exchange membrane fuel cell cooling plate based on dual-objective function topology theory,” Int. Commun. Heat Mass Transf., vol. 153, p. 107404, 2024.
[5] N. S. Mane et al., “Hybrid phase change material techniques for battery thermal management in electric vehicles: A comprehensive review and bibliometric analysis,” Energy Reports, vol. 14, pp. 4415–4436, 2025, doi: https://doi.org/10.1016/j.egyr.2025.11.024.
[6] E. Ermadani et al., “NUMERICAL STUDY ON THERMAL PERFORMANCE OF MINI-CHANNEL COOLING ON CYLINDRICAL LITHIUM-ION BATTERY COOLING SYSTEM,” Log. J. Ranc. Bangun dan Teknol., vol. 26, no. 1, pp. 86–94, 2026.
[7] C.-C. Wang, “A quick overview of compact air-cooled heat sinks applicable for electronic cooling—recent progress,” Inventions, vol. 2, no. 1, p. 5, 2017.
[8] K. Mankani, H. N. Chaudhry, and J. K. Calautit, “Optimization of an air-cooled heat sink for cooling of a solar photovoltaic panel: A computational study,” Energy Build., vol. 270, p. 112274, 2022.
[9] S. Caliskan, F. Guler, and S. S. Seyitoglu, “Investigating the cooling performance of CPU heat sinks using Al2O3/Water and SiC/water nanofluids,” Int. J. Therm. Sci., vol. 226, p. 110849, 2026.
[10] J. Mustafa, M. M. Abdullah, M. Z. Ahmad, S. Husain, and M. Sharifpur, “Numerical study of two-phase turbulence nanofluid flow in a circular heatsink for cooling LEDs by changing their location and dimensions,” Eng. Anal. Bound. Elem., vol. 149, pp. 248–260, 2023.
[11] E. Cuce, P. M. Cuce, and T. Guclu, “A novel passive cooling configuration for photovoltaic panels based on bio-inspired heatsinks and nanoparticle-enhanced PCM,” Appl. Therm. Eng., p. 130312, 2026.
[12] Y. Li, H. Fan, and Y. Jiu, “Investigation of a hybrid two-layered channel-jet heat sink for air cooling,” Int. J. Therm. Sci., vol. 203, p. 109121, 2024.
[13] P. J. Roache, “Perspective: a method for uniform reporting of grid refinement studies,” 1994.
[14] S. M. A. Aftab, A. S. Mohd Rafie, N. A. Razak, and K. A. Ahmad, “Turbulence model selection for low Reynolds number flows,” PLoS One, vol. 11, no. 4, p. e0153755, 2016.
[15] L. Rong, X.-S. Bai, J.-C. Li, R.-Z. Zhang, and W.-W. Yang, “Design and optimization of a hybrid cooling configuration combining PCM and liquid cooling for Li-ion battery using data-based response surface approximation model,” Appl. Therm. Eng., vol. 245, p. 122844, 2024.
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Copyright (c) 2026 Annisa Fitriola Suryawati, Damora Rhakasywi, Nicky Yongkimandalan, Bima Rakha Adhitama
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