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    Tytuł:
    Entropy generation on MHD slip flow over a stretching cylinder with heat generation/absorption
    Autorzy:
    Jain, S.
    Bohra, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/264521.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    wytwarzanie ciepła
    poślizg
    entropia
    magnetohydrodynamic
    heat generation
    slip
    entropy
    Opis:
    In the present study, we have investigated entropy generation on a magnetohydrodynamic fluid flow and heat transfer over a stretching cylinder with a porous medium in slip flow regime. A uniform heat source and radiation is also considered. Similarity transformation has been applied for making an ordinary differential equation from nonlinear governing partial differential equations. The numerical solution for the set of nonlinear ordinary differential equations has been obtained by using the fourth-order Runge-Kutta scheme together with the shooting method. The effects of pertinent parameters such as the magnetic field parameter, permeability parameter, slip parameter, Prandtl number and radiation parameter on the fluid velocity distribution, temperature distribution, entropy generation and Bejan number are discussed graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 413-428
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient free convective radiative flow between vertical parallel plates heated/cooled asymmetrically with heat generation and slip condition
    Autorzy:
    Gaur, P. K.
    Sharma, R. P.
    Jha, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/264930.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    wytwarzanie ciepła
    promieniowanie cieplne
    MHD
    slip flow
    heat generation
    thermal radiation
    Opis:
    Investigation of an MHD convective flow of viscous, incompressible and electrically conducting fluid through a porous medium bounded by two infinite vertical parallel porous plates is carried out. Forchheimer-Brinkman extended Darcy model is assumed to simulate momentum transfer within the porous medium. A magnetic field of uniform strength is applied normal to the plates. The analytical results are evaluated numerically and the presented graphically to discuss in detail the effects of different parameter entering into the problem.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 365-384
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Similarity solutions on mixed convection heat transfer from a horizontal surface saturated in a porous medium with internal heat generation
    Autorzy:
    Ferdows, M.
    Liu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/265076.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    mixed convection
    horizontal porous surface
    internal heat generation
    konwekcja mieszana
    powierzchnia porowata
    wytwarzanie ciepła
    Opis:
    The aim of this work is to study the mixed convection boundary layer flow from a horizontal surface embedded in a porous medium with exponential decaying internal heat generation (IHG). Boundary layer equations are reduced to two ordinary differential equations for the dimensionless stream function and temperature with two parameters: ε, the mixed convection parameter, and λ, the exponent of x. This problem is numerically solved with a system of parameters using built-in codes in Maple. The influences of these parameters on velocity and temperature profiles, and the Nusselt number, are thoroughly compared and discussed.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 1; 253-258
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady MHD mixed convection flow of a micropolar fluid over a vertical wedge
    Autorzy:
    Roy, N. C.
    Gorla, R. S. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/264759.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    micropolar fluid
    unsteady flow
    radiation
    heat generation
    płyn mikropolarny
    przepływ nieustalony
    promieniowanie
    wytwarzanie ciepła
    Opis:
    An analysis is presented to investigate the unsteady magnetohydrodynamic (MHD) mixed convection boundary-layer flow of a micropolar fluid over a vertical wedge in the presence of thermal radiation and heat generation or absorption. The free-stream velocity and surface temperature are assumed to be oscillating in magnitude but not in the direction of the oncoming flow velocity. The governing equations have been solved by two distinct methods, namely, the finite difference method for the entire frequency range, and the series solution for low frequency range and the asymptotic series expansion method for the high frequency range. Numerical solutions provide a good agreement with the series solutions. The amplitudes of skin friction and couple stress coefficients are found to be strongly dependent on the Richardson number and the vortex viscosity parameter. The Prandtl number, the conduction-radiation parameter, the surface temperature parameter and the pressure gradient parameter significantly affect the amplitudes of skin friction, couple stress and surface heat transfer rates. However, the amplitudes of skin friction coefficient are considerably affected by the magnetic field parameter, whereas the amplitudes of heat transfer rate are appreciably changed with the heat generation or absorption parameter. In addition, results are presented for the transient skin friction, couple stress and heat transfer rate with the variations of the Richardson number, the vortex viscosity parameter, the pressure gradient parameter and the magnetic field parameter.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 2; 363-391
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of non-uniform heat generation /absorption and radiation on hydromagnetic dissipative flow over a porous nonlinear stretching surface with heat and mass fluxes
    Autorzy:
    Anjali Devi, S. P.
    Agneeshwari, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/264962.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    strumień ciepła
    strumień masy
    absorpcja ciepła
    MHD
    heat flux
    mass flux
    non-uniform heat generation/absorption
    Opis:
    Forced convective heat and mass transfer flow of hydromagnetic, radiating and dissipative fluid over a porous nonlinear stretching sheet in the presence of non-uniform heat generation/absorption is investigated numerically. The system of nonlinear partial differential equations governing the physical problem is reduced to nonlinear ordinary differential equations by means of suitable similarity transformations and are solved numerically using Nachtsheim Swigert shooting iteration scheme together with fourth order Runge Kutta method. The effects of various physical parameters on velocity, temperature and concentration distributions are depicted graphically. The important findings of this study exhibited that the effect of non-uniform heat generation/absorption parameter and radiation parameter have significant role in controlling thermal boundary layer thickness and temperature. Numerical values of the skin friction coefficient, temperature and concentration at the wall are shown in a tabula form. A comparison is made with previously published data which results in good agreement.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 36-52
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanofluid motion past a shrinking sheet in porous media under the impact of radiation and heat source/sink
    Autorzy:
    Sharma, R. P.
    Jha, A. K.
    Gaur, P. K.
    Mishra, S. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/264665.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    promieniowanie cieplne
    wytwarzanie ciepła
    MHD
    nanofluid
    shrinking surface
    thermal radiation
    heat generation
    porous medium
    Opis:
    An investigation has been carried out for the MHD 3-dimensional flow of nanofluid over a shrinking sweet saturating a porous media in the presence of thermal radiation and heat generation. Convective boundary conditions for the flow phenomena are used in the present analysis. The governing equations are reduced to ODEs employing suitable similarity transformations. The solutions of formulated differential equations have been attained mathematically by fourth order R-K technique along with the shooting method. The impact of the governing constraints on momentum, heat, and local Nusselt number, are explored. It is noticed that the momentum and heat decrease with raise in the porosity variable, temperature reduces with an enhance in the thermal radiation variable, and temperature enhances with an enhance in the heat source/sink parameter.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 183-199
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermosensitive response of a functionally graded cylinder with fractional order derivative
    Autorzy:
    Lamba, Navneet Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/2174162.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    termoczułość
    naprężenia termiczne
    wytwarzanie ciepła
    time fractional
    thermal stresses
    thick hollow cylinder
    internal heat generation
    FGMs
    thermosenstive
    Opis:
    The present paper deals with thermal behaviour analysis of an axisymmetric functionally graded thermosensitive hollow cylinder. The system of coordinates are expressed in cylindrical-polar form. The heat conduction equation is of time-fractional order02<α≤, subjected to the effect of internal heat generation. Convective boundary conditions are applied to inner and outer curved surfaces whereas heat dissipates following Newton’s law of cooling. The lower surface is subjected to heat flux, whereas the upper surface is thermally insulated. Kirchhoff’s transformation is used to remove the nonlinearity of the heat equation and further it is solved to find temperature and associated stresses by applying integral transformation method. For numerical analysis a ceramic-metal-based functionally graded material is considered and the obtained results of temperature distribution and associated stresses are presented graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 107--124
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of heat generation/absorption on mixed convection flow behaviour in the presence of Lorentz forces in a vertical micro circular duct having time periodic boundary conditions: steady periodic regime
    Autorzy:
    Aina, B.
    Isa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839783.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konwekcja mieszana
    mikrokanał
    wytwarzanie ciepła
    poślizg
    mixed convection
    micro circular duct
    Lorentz force
    heat generation
    heat absorption
    slip and jump
    time
    Opis:
    The problem of mixed convection flow of a heat generating/absorbing fluid in the presence existence of Lorentz forces in a vertical micro circular subjected to a periodic sinusoidal temperature change at the surface has been studied taking the first-order slip and jump effects into consideration. The research analysis is carried out by considering a fully developed parallel flow and steady periodic regime. The governing equations, together with the constraint equations which arise from the definition of mean velocity and temperature, are written in a dimensionless form and mapped into equations in the complex domain. One obtains two independent boundary value problems, which provide the mean value and the oscillating term of the velocity and temperature distributions. These boundary value problems are solved analytically. A parametric study of some of the physical parameters involved in the problem is conducted. The results of this research revealed that the magnetic field has a damping impact on the flow and results in decreases in fluid velocity for both air and water. Furthermore, the presence of the heat generation parameter is seen to enhance the temperature distribution and this is reflected as an increase in the magnitude of the oscillation dimensionless velocity, whereas in the presence of heat absorption a reversed trend occurs.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 1-21
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal radiation and magnetic field effects on unsteady mixed convection flow and mass transfer over a porous stretching surface with heat generation
    Autorzy:
    Reddy, G. V. R.
    Reddy, B. A.
    Reddy, N. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/955276.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie
    wymiana masy
    rozciąganie
    pole magnetyczne
    wytwarzanie ciepła
    radiation
    mass transfer
    stretching surface
    magnetic field
    heat generation
    temperature
    Opis:
    The effects of thermal radiation and mass transfer on an unsteady hydromagnetic boundary layer mixed convection flow along a vertical porous stretching surface with heat generation are studied. The fluid is assumed to be viscous and incompressible. The governing partial differential equations are transformed into a system of ordinary differential equations using similarity variables. Numerical solutions of these equations are obtained by using the Runge-Kutta fourth order method along with the shooting technique. Velocity, temperature, concentration, the skin-friction coefficient, Nusselt number and Sherwood number for variations in the governing thermo physical parameters are computed, analyzed and discussed.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1151-1164
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A numerical examination of an unsteady nonlinear MHD flow in the presence of thermal radiation and heat generation
    Autorzy:
    Agbaje, T. M.
    Leach, P. G. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839890.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przepływ MHD
    promieniowanie cieplne
    wytwarzanie ciepła
    unsteady MHD flow
    spectral perturbation method
    spectral relaxation method
    thermal radiation
    heat generation
    Opis:
    In this study, the spectral perturbation method and the spectral relaxation method are used to solve the nonlinear differential equations of an unsteady nonlinear MHD flow in the presence of thermal radiation and heat generation. The SPM is mainly based on series expansion, generating series approximation coupled with the Chebyshev spectral method. The numerical results generated using the spectral perturbation method were compared with those found in the literature, and the two results were in good agreement.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 1; 1-17
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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