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Author: search.filters.author.Ganteda, CharankumarSubject: search.filters.subject.Thermophoresis

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    Numerical simulation of unsteady MHD bio-convective flow with Cattaneo-Christov heat flux over a stretching surface
    (2025-04-01)
    Shalini, Chinnam A.A.E.
    ;
    Ganteda, Charankumar
    ;
    Reddy, G. V.Ramana
    ;
    Maheswari, B. Uma
    ;
    Kokila, G.
    The study explores the properties of mass and heat transfer in a time-dependent, unsteady magnetohydrodynamic (MHD) flow over a permeable, radiative, and expanded surface, incorporating bio-convection, nanoparticle suspension, and gyrotactic bacteria dynamics. The model considers the effects of emission, speed slip, and bio-thermal convection in the fluid system. The Cattaneo-Christov heat flux model is employed to account for the finite speed of thermal diffusion, and the fourth-order Runge-Kutta method with the shooting technique is utilized for numerical solutions. Additionally, the study investigates the influence of mass suction, heat source, and aligned magnetic field on the boundary layer. The local concentration of mobile microorganisms decreases as the stretching parameter and bio-convection Schmidt both improve. The concentration φ(η) gets stronger, and when Sc values increase, it decreases. The concentration of microorganism h(η) is strengthened by increasing angle β, but it is diminished by increasing Pe,Sb and Sc, respectively.Even if the rate of temperature transmission (Nu) is maximal for positive values of A relative to negative values, the friction drags (C<inf>f</inf>) are more powerful for negative values of A than for positive values of A.
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    Numerical study on thermal radiation and chemical reaction impacts on Prandtl nanofluid flow over a bilinear stretching sheet with heat generation and absorption: Response surface methodology
    (2025-02-01)
    Padmavathi, L.
    ;
    Kumar, S. Geethan
    ;
    Ganteda, Charankumar
    ;
    Varma, S. V.K.
    ;
    Gouthami, E.
    The study focuses on the three-dimensional flow of a non-Newtonian Prandtl nanofluid with electrical conductivity, flowing over a bilinear expanding surface within a porous medium. These flows in porous medium are applied in water purification processes, petroleum industries and also chemical factories. The exploration examines various heat and mass transport phenomena, including the consequences of thermal radiation, thermophoresis, Brownian motion, substance response and heat source/sink. The governing partial differential equations are reformulated into a system of nonlinear ordinary differential equations through the application of appropriate similarity transformations. These equations are subsequently solved by using numerical methods bvp4c as well as shooting method. Furthermore, the arithmetical values for the friction factor and the temperature and accumulation constants are provided in tables. It is experiential that the Prandtl fluid constraint enhances the axial and transverse velocities, while the temperature sharing shows an inverse relationship. The temperature and concentration distributions have an opposite attitude with the influence of Brownian motion parameter.