Pimpunchat, Busayamas

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Pimpunchat, Busayamas
Alternative Name
Pimpunchat, B.
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Email
busayamas.pi@kmitl.ac.th

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    Combined viscous dissipation and joule heating effects on chemically radiative MHD micropolar flow with heat source and convective boundary conditions
    (2025-02-01)
    Konda, Jayaramireddy
    ;
    Reddy, M. Narendranadh
    ;
    Ganteda, Charankumar
    ;
    Kottapalli, Rajyalakshmi
    ;
    Adinarayana, Y.
    The proposed study presents a comprehensive investigation of the combined effects of viscous dissipation and Joule heating on chemically reactive magnetohydrodynamic (MHD) micropolar fluid flow over a nonlinear stretching sheet, incorporating the influences of radiative heat transfer, heat source, and convective boundary conditions. The current study investigates the flow of a type of fluid called micropolar fluid in a stretched 2D space. This fluid is viscous, and the flow is influenced by convective boundary conditions. Mathematical equations are derived considering factors such as heat, friction, electrical effects, chemical reactions, and radiation heat transfer. The fluid can conduct electricity when exposed to an external magnetic field. The complex partial differential equations governing the boundary layer flow are simplified into ordinary differential equations using a technique known as similarity transformation. The problem is solved using the Runge-Kutta-Fehlberg method with a shooting technique. Graphs are generated to analyze how physical factors influence temperature and concentration profiles. The skin friction coefficient, local Nusselt number, and local Sherwood number are calculated and studied. In this study, we compare our results with those of other research and find good agreement.
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    On Cattaneo-Chrystov heat flux model for nanofluid flow on Darcy–Forchheimer porous medium past unsteady stretching cylinder
    (2025-03-01)
    Sobhanapuram, Sreedhar
    ;
    Devi, S. V.V.Rama
    ;
    Ganteda, Charankumar
    ;
    Kottapalli, Rajyalakshmi
    ;
    Govindan, Vediyappan
    In a Darcy-Forchheimer porous medium with variable thermal conductivity, this work describes the convective transport mechanisms of Williamson nanofluid and nanofluid flow via an unstable stretched cylindrical sheet. The governing boundary evaluates issue of the flow regime is formulated utilizing the conservation laws of mass, momentum, energy. A couple of nonlinear partial differential constitutions are used to express the flow. A suitable similarity transformation along with certain approaches are applied to convert the pair of partial differential constitutions into an initial value problem system. In this analysis, the Cattaneo-Chrystov model is introduced. After that, the shooting strategy and the Runge-Kutta fourth order are used to numerically solve the system of initial value problems. Analysis is done on the effects of several factors on the nanofluid's temperature, velocity, and concentration contours. such as the thermal conductivity parameter, the concentration and temperature Biot numbers, the unsteady parameter, and others. Conversely, larger values of the unstable parameter result in significant wall friction that hinders the nanofluid'smobility. Furthermore, under widely accepted assumptions, the numerical approach found here shows great agreement with several previous efforts. An uplifting in the unsteady factor causes the nanofluid's temperature and concentration boundary layers to enlarge. When the corresponding Biot numbers (thermal and concentration) grow, the two boundary layers of the nanofluid expand, initiating the convective mass and heat transfers from the wall to the system. The rates of mass and heat transfers increase and decrease in tandem with increases in the thermal conductivity parameter and thermal Biot number, respectively; however, the transfers exhibit the opposite behavior for higher concentration Biot number values.Compared with the existing research, the outcomes demonstrate excellent congruence.