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Enhancement of heat and mass transfer rates through various porous cavities for triple convective-diffusive free convection

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  • Khan, Zafar Hayat
  • Khan, Waqar Ahmed
  • Sheremet, Mikhail Alexandrovich

Abstract

Convective energy and mass transfer in various porous chambers are a wide-spread physical phenomenon in natural and technical systems. The triple diffusive free convection is examined in square, trapezoidal and triangular porous chambers under an impact of internal volumetric heat generation. The top and bottom surfaces of the chambers are assumed to be adiabatic and impermeable. In this study, different concentrations of NaCl and Sucrose are utilized as solutal components with water. Governing equations written employing the linear Darcy model and non-primitive dimensionless variables were worked out by the finite element technique with the Galerkin method of weighted residuals. The influence of the internal heat generation rate, Rayleigh and Lewis numbers, buoyancy ratios on the dimensionless temperature, the concentration of both salts, Nusselt, Lewis and Sherwood numbers are scrutinized. The study reveals that the growth of the inner volumetric heat flux raises the temperature within the cavity and reduces the Nusselt number, while the Sherwood and Nusselt numbers are raised with the buoyancy ratio parameter. Also, the triangular cavity shows the highest heat and mass transfer rate.

Suggested Citation

  • Khan, Zafar Hayat & Khan, Waqar Ahmed & Sheremet, Mikhail Alexandrovich, 2020. "Enhancement of heat and mass transfer rates through various porous cavities for triple convective-diffusive free convection," Energy, Elsevier, vol. 201(C).
    • Handle: RePEc:eee:energy:v:201:y:2020:i:c:s0360544220308094
    DOI: 10.1016/j.energy.2020.117702
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    Cited by:

    1. Biswas, Nirmalendu & Mandal, Dipak Kumar & Manna, Nirmal K. & Benim, Ali Cemal, 2023. "Enhanced energy and mass transport dynamics in a thermo-magneto-bioconvective porous system containing oxytactic bacteria and nanoparticles: cleaner energy application," Energy, Elsevier, vol. 263(PB).
    2. Vellaboyina Nagendramma & Putta Durgaprasad & Narsu Sivakumar & Battina Madhusudhana Rao & Chakravarthula Siva Krishnam Raju & Nehad Ali Shah & Se-Jin Yook, 2022. "Dynamics of Triple Diffusive Free Convective MHD Fluid Flow: Lie Group Transformation," Mathematics, MDPI, vol. 10(14), pages 1-31, July.
    3. Pervinder Singh & Vinod K. Gupta & Isaac Lare Animasaun & Taseer Muhammad & Qasem M. Al-Mdallal, 2023. "Dynamics of Newtonian Liquids with Distinct Concentrations Due to Time-Varying Gravitational Acceleration and Triple Diffusive Convection: Weakly Non-Linear Stability of Heat and Mass Transfer," Mathematics, MDPI, vol. 11(13), pages 1-20, June.

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