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Investigations on a variable channel width double-layered minichannel heat sink using advanced coolants

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Abstract

The present research investigates the performance of a proposed variable channel width double-layered minichannel heat sink (VWC DL-MCHS) with advanced coolants. Nanofluids such as Al2O3–water and CuO–water with nanoparticle concentration (Øp) of 1%, 5% and 9% and n-octadecane–water NEPCM slurries with particle concentration (Cm) of 5%, 10% and 20% are used as advanced coolants. Along with that, the effect of the dimensionless stepped fin length (λ) on the thermal performance of a VWC DL-MCHS is investigated by considering various values of λ (0.2, 0.4, 0.6, 0.8 and 1). The results show that VWC DL-MCHS performs better as compared to conventional DL-MCHS. A VWC DL-MCHS with zero overlap and λ = 0.8 using CuO–water (Øp = 1%) nanofluid as coolant turns out the best configuration. Therefore, a VWC DL-MCHS with λ = 0.8 and zero overlap with advanced coolants would serve as an efficient thermal management solution for microelectronics devices.

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Acknowledgements

This work is financially supported by the Science and Engineering Research Board (SERB), Department of Science and Technology, Government of India under the Core Research Grant Sanction No. SERB/EMR/2017/000429.

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  1. Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, 395007, India

    Nirav Patel & Hemantkumar B. Mehta

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  1. Nirav Patel
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Correspondence to Hemantkumar B. Mehta.

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Appendix

Appendix

Thermophysical properties of CuO–water nanofluid

The equations reported by Minsta et al. [20] are shown below.

  • For Øp = 9.3% → \(k_{\text{eff}}\) = 0.003 \(T_{\text{f}}\) (°C) + 0.61

  • For Øp = 6.1% → \(k_{\text{eff}}\) = 0.0032 \(T_{\text{f}}\) (°C) + 0.59

  • For Øp = 3.3% → \(k_{\text{eff}}\) = 0.0044 \(T_{\text{f}}\) (°C) + 0.53.

From these equations, Nguyen and Rimbault et al. [20] have interpolated and determined the following correlations.

  • For Øp = 4.5% → \(k_{\text{eff}}\) = (1.041E − 17)\(T_{\text{f}}^{2}\)(°C) + 0.00388571428571341000 \(T_{\text{f}}\) + 0.555714285714301

  • For Øp = 1.03% → \(k_{\text{eff}}\) = 0.00223214447146814000 \(T_{\text{f}}\)(°C) + 0.63975654568569

  • For Øp = 0.24% → \(k_{\text{eff}}\) = 0.00147769254744161000 \(T_{\text{f}}\)(°C) + 0.57579978104837900000.

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Patel, N., Mehta, H.B. Investigations on a variable channel width double-layered minichannel heat sink using advanced coolants. J Therm Anal Calorim 145, 3359–3379 (2021). https://doi.org/10.1007/s10973-020-09904-4

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