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    Wyświetlanie 1-4 z 4
    Tytuł:
    A Study on the Effects of Inclined Magnetic Field, Flow Medium Porosity and Thermal Radiation on Free Convection of Casson Nanofluid over a Vertical Plate
    Autorzy:
    Sobamowo, M. G.
    Yinusa, A. A.
    Makinde, O. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046549.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Casson nanofluid
    Flow medium porosity
    Free convection
    Inclined magnetic field
    Thermal radiation
    Variational homotopy perturbation method
    Opis:
    In this paper, variational homotopy perturbation method with Padé approximant technique is applied to investigate the impacts of inclined magnetic field, flow medium porosity and thermal radiation on free convection flow and heat transfer of Casson nanofluids over a vertical plate. The accuracies of the developed analytical methods are verified by comparing the results of the analytical solutions with the results of past works as presented in literature. Thereafter, the analytical solutions are used to investigate the effects of thermal radiation; Prandtl number, nanoparticles volume-fraction, shape and type on the flow and heat transfer behaviour of various nanofluids over the flat plate. It is observed that both the velocity and temperature of the nanofluid as well viscous and thermal boundary layers increase with increase in the radiation parameter. The velocity and temperature of the nanofluid decreases and increases, respectively as the Prandtl number and volume-fraction of the nanoparticles in the basefluid increase. The maximum decrease in velocity and maximum increase in temperature are caused lamina shaped nanoparticle and followed by platelets, cylinder, bricks and sphere-shaped nanoparticles, respectively. It is hoped that the present study will enhance the understanding of free convection boundary-layer problems under the influence of thermal radiation as applied in various engineering processes.
    Źródło:
    World Scientific News; 2019, 138, 1; 1-64
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Newtonian heating effect on heat absorbing unsteady MHD radiating and chemically reacting free convection flow past an oscillating vertical porous plate
    Autorzy:
    Prabhakar Reddy, B.
    Makinde, O. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174166.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    promieniowanie
    reakcja chemiczna
    Newtonian heating
    radiation parameter
    chemical reaction rate
    oscillating plate
    heat absorption parameter
    Opis:
    In this article, we have discussed in detail the effect of Newtonian heating on MHD unsteady free convection boundary layer flow past an oscillating vertical porous plate embedded in a porous medium with thermal radiation, chemical reaction and heat absorption. The governing PDEs of the model together with related initial and boundary conditions have been solved numerically by the finite element method. The dimensionless velocity, temperature and concentration profiles are analyzed graphically due to the effects of key parameters in the concerned model problem. Computed results for the skin friction coefficient, Nusselt number and Sherwood number are put in tabular form. It is observed that the thermal and mass buoyancy effects support the velocity whilst a reverse effect is noticed when the strength of the magnetic field is increased. The velocity and temperature enhances with an increase in the Newtonian heating and thermal radiation whilst a reverse effect is observed with an increase in the Prandtl number and heat absorption parameter. Increasing Schmidt number and chemical reaction parameter tends to depreciate both velocity and concentration. The Newtonian heating, thermal radiation and magnetic field tends to decrease in the skin friction. The Nusselt number increases with increasing Newtonian heating and heat absorption parameters. An increase in the Schmidt number and chemical reaction rate tends to improve the Sherwood number.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 168--187
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-perturbative solution for hydromagnetic flow over a linearly stretching sheet
    Autorzy:
    Makinde, O. D.
    Mahabaleswar, U. S.
    Maheshkumar, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/264356.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    rozciąganie arkusza
    przepływ hydromagnetyczny
    rozwiązanie numeryczne
    stretching sheet
    hydromagnetic flow
    ADM-Padé
    numerical solution
    Opis:
    In this paper, the Adomian decomposition method with Padé approximants are integrated to study the boundary layer flow of a conducting fluid past a linearly stretching sheet under the action of a transversely imposed magnetic field. A closed form power series solution based on Adomian polynomials is obtained for the similarity nonlinear ordinary differential equation modelling the problem. In order to satisfy the farfield condition, the Adomian power series is converted to diagonal Padé approximants and evaluated. The results obtained using ADM-Padé are remarkably accurate compared with the numerical results. The proposed technique can be easily employed to solve a wide range of nonlinear boundary value problems.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 935-943
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear Thermally Induced Dynamic Analysis of Non-Homogenous Rectangular Plate with Varying Thickness Using Three-Dimensional Differential Transform Method
    Autorzy:
    Sobamowo, M. G.
    Salawu, S. A.
    Yinusa, A. A.
    Makinde, O. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046541.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Non-Homogenous
    Three-dimensional differential transform
    thermal induced dynamic vibration
    varying thickness
    Opis:
    The practical importance of thermally induced varying thickness plates has recently become an area of increase interest for engineers due to its wide applications. The temperature effect alters the modulus of elasticity of the plate causing an irrational behavior of the plate. This present study presents the application of three-dimensional differential transform method (3D-DTM) to nonlinear thermally induced dynamic analysis of non-homogenous rectangular plate with varying thickness under external excitation. Three-dimensional differential transform is used to obtain the analytical solution to the governing differential equation and the solution is used for the parametric studies. It is shown that, taper constant increases with increase in maximum deflection, thermal constant increases with decreases in maximum deflection, increases in aspect ratio leads to decreases in maximum deflection, increase in natural frequency results to increases in maximum deflection and non-homogeneity constant increases with increase in maximum deflection. Findings of the research is expected to add value to existing knowledge of classical plate theory.
    Źródło:
    World Scientific News; 2019, 138, 2; 141-166
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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