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A COMSOL-Based Numerical Simulation of Heat Transfer in a Hybrid Nanofluid Flow at the Stagnant Point across a Stretching/Shrinking Sheet: Implementation for Understanding and Improving Solar Systems

Author

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  • Ahmad Ayyad Alharbi

    (Department of Mathematics, College of Science, Northern Border University, Arar 73222, Saudi Arabia)

  • Ali Rashash R. Alzahrani

    (Mathematics Department, Faculty of Sciences, Umm Al-Qura University, Makkah 24382, Saudi Arabia)

Abstract

The present study investigates hybrid nanofluid (HNF) behavior at the stagnation point near a stretching/shrinking sheet using the Tiwari and Das model. The governing equations were transformed into a boundary layer flow model and simulated using COMSOL Multiphysics 6.0. This research examines flow characteristics, temperature profiles, and distributions by varying parameters: stretching/shrinking ( λ , −2 to 2), slip flow ( δ , 0 to 1 m), suction ( γ , 0 to 1), and similarity variables ( η , 0 to 5). The HNF comprised equal ratios of copper and alumina with total concentrations ranging from 0.01 to 0.1. The results showed that velocity profiles increased with distance from the stagnation point, escalated in shrinking cases, and decayed in stretching cases. Increased suction consistently reduced velocity profiles. Temperature distribution was slightly slower in shrinking compared to stretching cases, with expansion along the sheet directly proportional to η estimates but controllable through suction adjustments. The findings were applied to enhance photovoltaic thermal (PV/T) system performance. Stretching sheets proved crucial for improving electricity production efficiency. Non-slip wall conditions and increased copper volume fractions in the presence of suction effects led to notable improvements in electrical efficiency. The maximum average efficiency was achieved when γ = 0.4, λ = 2, δ = 0.7, and ϕ 2 = 0.01, which was of about 10%. The present numerical work also aligned well with the experimental results when evaluating the thermal efficiency of conventional fluids. These insights contribute to optimizing PV/T system parameters and advancing solar energy conversion technology, with potential implications for broader applications in the field.

Suggested Citation

  • Ahmad Ayyad Alharbi & Ali Rashash R. Alzahrani, 2024. "A COMSOL-Based Numerical Simulation of Heat Transfer in a Hybrid Nanofluid Flow at the Stagnant Point across a Stretching/Shrinking Sheet: Implementation for Understanding and Improving Solar Systems," Mathematics, MDPI, vol. 12(16), pages 1-38, August.
    • Handle: RePEc:gam:jmathe:v:12:y:2024:i:16:p:2493-:d:1454997
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    References listed on IDEAS

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    1. Trisaksri, Visinee & Wongwises, Somchai, 2007. "Critical review of heat transfer characteristics of nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(3), pages 512-523, April.
    2. Daungthongsuk, Weerapun & Wongwises, Somchai, 2007. "A critical review of convective heat transfer of nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(5), pages 797-817, June.
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