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Home > Archives > Volume 20, No 11 (2022) > Article

DOI: 10.14704/nq.2022.20.11.NQ66122

Computational Analysis of Performance of a Hollow Structured Radial Fin CPU Heat Sinkwith Dual Flow Impact

A.D.S. SAKETH, Dr C.L.V.R.S.V. PRASAD

Abstract

The efficiency of the cooling system for the CPU of a computer is essential in the case of high-speed computing systems. The presentinvestigation deals with the model designing&computational evaluation of the performance of a hollow structured radial fin heat sink with dual side heat transfer (HT)when placed on the CPU, enhancing the HTrate. In addition, the thermofluidic behaviour of the Heat Sink (HS) and its impact on the CPU's performance were studied. The commercially available CFD tool (ANSYS FLUENT 2020 R2) wasutilized for numerical analysis of the HT of a hollow radial fin heat sink. The external geometry of the HS under consideration is similar to a conventional CPU HS, mostly seen and made of aluminium. However, the fins have hollow space internally and are connected to a common chamber at the bottom. Apart from the convective heat transfer with the cooling fan fixed on the heat sink, the cold air from the vortex tube at 25℃ enters the hollow heat sink through the two tubes at the bottom, which then passes across the fins. A tapered radial fin heat sink is studied & simulated at different mass flow rates varying from 1-5 g/s under forced convection. The tapered radial heat sink at 5 g/s had shown better thermal performance and kept its CPU temperature at the lower temperature of about 41.45 ℃, which is usually at 65-70 ℃. The thermal Performance of Conventional radial fin heat sink & Hollow structured radial fin heat sink is also compared. air can travel into interior parts of the fins. As the surface area increased, the heat transfer rate also increased and hence we can maintain the temperature of CPU under adequate levels

Keywords

CPU, Heat Sink, Air Cooling,Aluminium, CFD, Hollow, Internal Flow, Radial Fins

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