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Slip effects on unsteady mixed convection of hybrid nanofluid flow near the stagnation point

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Abstract

The unsteady mixed convection of the Al2O3-Cu/H2O hybrid nanofluid flow near the stagnation point past a vertical plate is analyzed. The bvp4c technique is used to solve the resulting ordinary differential equations. The combined effects of the velocity and thermal slip are addressed. The effects of different relevant physical parameters are studied numerically. The results show that the heat transfer rate is reduced when the volume fraction of the nanoparticles increases, while the unsteadiness parameter has an opposite effect in the opposing flow. The presence of the slip parameter is proven to increase the skin friction coefficient while reduce the local Nusselt number in the buoyancy opposing flow. A contradictory result is observed in the buoyancy assisting flow. Meanwhile, the heat transfer rate is reduced in the buoyancy of the assisting and opposing flows when the thermal slip effect is considered.

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Acknowledgements

The current study is funded by the Research University Grant (GUP-2019-034) from the Universiti Kebangsaan Malaysia.

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Authors and Affiliations

  1. Department of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, 43600, Malaysia

    N. A. Zainal & R. Nazar

  2. Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, 76100, Malaysia

    N. A. Zainal

  3. Institute of Mathematical Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia

    K. Naganthran

  4. Center for Data Analytics, Consultancy and Services, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia

    K. Naganthran

  5. Department of Mathematics, Babeş-Bolyai University, R-400084, Cluj-Napoca, Romania

    I. Pop

Authors
  1. N. A. Zainal
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  2. R. Nazar
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  3. K. Naganthran
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  4. I. Pop
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Corresponding author

Correspondence to R. Nazar.

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Citation: ZAINAL, N. A., NAZAR, R., NAGANTHRAN, K., and POP, I. Slip effects on unsteady mixed convection of hybrid nanofluid flow near the stagnation point. Applied Mathematics and Mechanics (English Edition), 43(4), 547–556 (2022) https://doi.org/10.1007/s10483-022-2823-6

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Zainal, N.A., Nazar, R., Naganthran, K. et al. Slip effects on unsteady mixed convection of hybrid nanofluid flow near the stagnation point. Appl. Math. Mech.-Engl. Ed. 43, 547–556 (2022). https://doi.org/10.1007/s10483-022-2823-6

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  • DOI: https://doi.org/10.1007/s10483-022-2823-6

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