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      https://www.ias.ac.in/article/fulltext/pram/094/0108

    • Keywords

       

      Soret and Dufour effects; magnetohydrodynamics boundary layer; Carreau fluid; mixed convection; moving vertical plate.

    • Abstract

       

      In this analysis, the mixed convection boundary layer MHD flow of non-Newtonian Carreau fluid subjected to Soret and Dufour effects over a moving vertical plate is studied. The governing flow equations are converted into a set of non-linear ordinary differential equations using suitable transformations. For numerical computations, bvp4c in MATLAB package is used to solve the resulting equations. Impacts of various involved parameters, such as Weissenberg number, power-law index, magnetic parameter, thermal buoyancy parameter, solutal buoyancy parameter, thermal radiation, Dufour number, Soret number and reaction rate parameter, on velocity, temperature and concentration are shown through figures. Also, the local skin-friction coefficient, local Nusselt number and local Sherwood number are calculated and shown graphically and in tabular form for different parameters. Some important facts are revealed during the investigation. The temperature and concentration show decreasing trends with increasing values of power-law index, whereas velocity shows reverse trend and these trends are more prominent for larger values of Weissenberg number. For stronger magnetic field, velocity decreases, while the temperature and concentration increase. It was also found that for shear thinning fluid the drag coefficient exhibits an increasing character when Weissenberg number increases, but for shear thickening fluid the drag coefficient shows the contrary nature. For small values of Dufour number, heat transfer rate enhances with increasing Soret number, but for higher values of Dufour number it slightly dies down with Soret number and the mass transfer rate reacts oppositely. In addition, due to increasing chemical reaction rate, the concentration and velocity decrease.

    • Author Affiliations

       

      ANIL KUMAR GAUTAM1 AJEET KUMAR VERMA1 KRISHNENDU BHATTACHARYYA1 ASTICK BANERJEE2

      1. Department of Mathematics, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
      2. Department of Mathematics, Sidho-Kanho-Birsha University, Purulia 723 104, India
    • Dates

       
  • Pramana – Journal of Physics | News

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