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Coupled buoyancy and Marangoni convection in a hybrid nanofluid-filled cylindrical porous annulus with a circular thin baffle

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Abstract

The purpose of the current article is to evaluate the impact of coupled buoyancy and thermocapillary driven convection in a cylindrical porous annulus saturated with Ag/MgO–water hybrid nanofluid along with viscous dissipation effects. The left side wall of the annulus is kept heated, while the right side wall of the annulus is kept cold. The top and bottom limits are supposed to be adiabatic. A thin circular baffle is anchored to the inner cylinder. The primary goal of this research is to look into the effect of baffle size and location on Marangoni convection, thermal behaviour, and flow fields. Here, the effects of viscous dissipation are taken into account. The governing equations are subjected to the finite difference approach, which employs the ADI, SOR, and central differencing schemes. In this work, contour plots and average Nusselt number profiles are used to demonstrate the flow type, temperature behaviour, and thermal variations along the enclosure. The research demonstrates that the size and location of the fin plays a prominent role in influencing fluid flow within the annulus. An improvement in thermal transfer rate is reported for \(\phi \) and for the higher value of Ma considering the viscous dissipation, length and location of the baffle.

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Acknowledgements

This work was supported by the Department of Science and Technology, India. The authors would like to thank DST, India, for its financial support through this research project (SR/WOS-A/PM-105/2017).

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Authors and Affiliations

  1. Department of Mathematics, Bharathiar University, Coimbatore, Tamil Nadu, 641 046, India

    B. Kanimozhi & M. Muthtamilselvan

  2. Department of Mathematical Sciences, United Arab Emirates University, P. O. Box 15551, Al Ain, Abu Dhabi, United Arab Emirates

    Qasem M. Al-Mdallal

  3. Department of Mathematics and General Sciences, Prince Sultan University, P. O. Box 66833, Riyadh, 11586, Saudi Arabia

    Bahaaeldin Abdalla

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  1. B. Kanimozhi
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  2. M. Muthtamilselvan
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  3. Qasem M. Al-Mdallal
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  4. Bahaaeldin Abdalla
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Correspondence to M. Muthtamilselvan or Qasem M. Al-Mdallal.

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Kanimozhi, B., Muthtamilselvan, M., Al-Mdallal, Q.M. et al. Coupled buoyancy and Marangoni convection in a hybrid nanofluid-filled cylindrical porous annulus with a circular thin baffle. Eur. Phys. J. Spec. Top. 231, 2645–2660 (2022). https://doi.org/10.1140/epjs/s11734-022-00594-7

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