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    Wyświetlanie 1-13 z 13
    Tytuł:
    Surface waves in non-homogeneous, general magnetothermo, viscoelastic media of higher order
    Autorzy:
    Sethi, M.
    Gupta, K. C.
    Rani, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/955273.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fale powierzchniowe
    lepkość
    lepkosprężystość
    inhomogeneous media
    variable density
    surface waves
    viscosity
    Opis:
    The aim of the present paper is to investigate surface waves in a non-homogeneous, isotropic, visco-elastic solid medium of n-th order including the time rate of strain. The theory of generalised surface waves has firstly been developed and then it has been employed to investigate particular cases of waves, viz., Stoneley, Rayleigh and Love type. The wave velocity equations have been obtained for different cases and are in well agreement with the corresponding classical result, when the effects of viscosity, temperature, magnetism as well as nonhomogeneity of the material medium are ignored.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1221-1236
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat and mass transfer effect on an infinite vertical plate in the presence of hall current and thermal radiation with variable temperature
    Autorzy:
    Manjula, L.
    Muthucumaraswamy, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106450.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    efekt Halla
    promieniowanie
    MHD
    Hall effect
    radiation
    vertical plate
    variable temperature
    Opis:
    MHD and radiated heat flow on a rotating system of an electrically conducting fluid in the presence of Hall current under the influence of variable temperature is studied analytically. An exact solution of a non-dimensional form of coupled partial differential equations is obtained by the technique of Laplace transform. The effect of temperature, velocity and concentration is analyzed for various parameters like the Hall parameter [...], thermal radiation [...], rotation parameter [...], Hartmann number [...] and results are discussed in detail with the help of graphs. A mixed analysis of a rotating fluid with Hall current and thermal radiation plays a very essential role in the research area such as plasma physics, MHD generator, fluid drift sensor, cosmological and geophysical level, etc.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 131--140
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of variable viscosity on MHD inclined arterial blood flow with chemical reaction
    Autorzy:
    Tripathi, B.
    Sharma, B. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/264659.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    lepkość
    reakcja chemiczna
    magnetohydrodynamical fluid
    homotopy perturbation method
    variable viscosity
    chemical reaction
    Opis:
    In this paper, we present the mathematical study of heat and mass transfer effects on an arterial blood flow under the influence of an applied magnetic field with chemical reaction. A case of mild stenosis is considered in a non-tapered artery which is inclined at an angle γ from the axis. The variable viscosity of the blood is considered varying with the hematocrit ratio. Governing non-linear differential equations have been solved by using an analytical scheme, homotopy perturbation method to obtain the solution for the velocity, temperature and concentration profiles of the blood flow. For having an adequate insight to blood flow behavior through a stenosed artery, graphs have been plotted for wall shear stress, velocity, temperature and concentration profiles with varying values of the applied magnetic field, chemical reaction parameter and porosity parameter. The results show that in an inclined artery, the magnitude of the wall shear stress at stenosis throat increases as values of the applied magnetic field increase while it reduces as the values of both the chemical reaction and porosity parameters increase. Contour plots have been plotted to show the variations of the velocity profile of blood flow as the values of the height of the stenosis as well as the influence of the applied magnetic field increase.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 3; 767-785
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variable gravity effects on thermal instability of nanofluid in anisotropic porous medium
    Autorzy:
    Chand, R.
    Rana, G. C.
    Kumar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265426.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    porowatość
    liczba Rayleigha
    zmienna grawitacja
    nanofluid
    anisotropic porous medium
    Rayleigh number
    variable gravity
    Opis:
    In this paper, we study the effects of variable gravity on thermal instability in a horizontal layer of a nanofluid in an anisotropic porous medium. Darcy model been used for the porous medium. Also, it incorporates the effect of Brownian motion along with thermophoresis. The normal mode technique is used to find the confinement between two free boundaries. The expression of the Rayleigh number has been derived, and the effects of variable gravity and anisotropic parameters on the Rayleigh number have been presented graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 631-642
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variable thermal conductivity in micropolar thermoelastic medium without energy dissipation possessing cubic symmetry
    Autorzy:
    Ailawalia, Praveen
    Priyanka
    Powiązania:
    https://bibliotekanauki.pl/articles/27312393.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    transfer ciepła
    mikrorotacja
    temperatura
    variable thermal conductivity
    microrotation
    temperature distribution
    normal mode analysis
    Opis:
    This investigation deals with the effect of variable thermal conductivity in a micropolar thermoelastic medium without energy dissipation with cubic symmetry. The normal mode technique is employed for obtaining components of physical quantities such as displacement, stress, temperature distribution and microrotation.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2023, 28, 1; 1--10
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrically conducting flow through exponential power law fluid with variable thermal conductivity
    Autorzy:
    Ferdows, M.
    Bangalee, M. Z. I.
    Liu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/265439.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    warstwa graniczna
    podobieństwa
    MHD
    similarity solution
    variable properties
    boundary layer flow
    exponential law
    Opis:
    The problem of exponential law of steady, incompressible fluid flow in boundary layer and heat transfer are studied in an electrically conducting fluid over a semi-infinite vertical plate assuming the variable thermal conductivity in the presence of a uniform magnetic field. The governing system of equations including the continuity equation, momentum equation and energy equation have been transformed into nonlinear coupled ordinary differential equations using appropriate similarity variables. All the numerical and graphical solutions are obtained through the use of Maple software. The solutions are found to be dependent on three dimensionless parameters including the magnetic field parameter M, thermal conductivity parameter and Prandtl number Pr. Representative velocity and temperature profiles are presented at various values of the governing parameters. The skin-friction coefficient and the rate of heat transfer are also calculated for different values of the parameters.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 539-548
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation effects on MHD boundary layer flow and heat transfer over a nonlinear stretching surface with variable wall temperature in the presence of non-uniform heat source/sink
    Autorzy:
    Devi, S. P. A.
    Agneeshwari, M.
    Raj, J. W. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/947377.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    promieniowanie
    źródło ciepła
    MHD
    radiation
    non-uniform heat source/sink
    variable wall temperature
    Opis:
    In this paper, an investigation is made to analyze the effects of radiation on an MHD boundary layer flow and heat transfer over a nonlinear stretching surface with variable wall temperature and non-uniform heat source/sink. A suitable similarity transformation is used to transform the governing nonlinear partial differential equations into a system of nonlinear ordinary differential equations by using the Nachtsheim Swigert shooting iteration technique together with the fourth order Runge Kutta method. The effects of various physical parameters over a dimensionless velocity and dimensionless temperature are presented graphically. The numerical results for the skin friction co-efficient and non-dimensional rate of heat transfer are presented and discussed for several sets of values of the parameters. Comparisons of numerical results are made with the earlier published results under limiting cases.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 289-305
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite difference solution of unsteady flow past an oscillating semi-infinite vertical plate with variable surface temperature and uniform mass flux
    Autorzy:
    Muthucumaraswamy, R.
    Saravanan, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/955236.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie
    płyta pionowa
    strumień masy
    radiation
    vertical plate
    finite differences
    variable temperature
    uniform mass flux
    Opis:
    A finite difference solution of an unsteady flow past an oscillating semi-infinite vertical place with variable temperature and uniform mass flux is presented here. The fluid considered here is a gray, absorbing-emitting radiation but a non-scattering medium. The dimensionless governing equations are solved by an efficient, more accurate, and unconditionally stable and fast converging implicit scheme. The steady state velocity, temperature and concentration profiles are shown graphically. The effect of velocity and temperature for different physical parameters such as the thermal radiation, Schmidt number, thermal Grashof number and mass Grashof number is studied. It is observed that the velocity decreases in the presence of thermal radiation. It is also observed that the time taken to reach a steady-state is more in the case of vertical plate than horizontal plate.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2014, 19, 4; 709-724
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytical solutions to boundary value problem of free vibration of sandwich thin circular plates with discrete elements
    Autorzy:
    Żur, K. K.
    Jaroszewicz, J.
    Dragun, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/265886.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    free vibrations
    non-homogeneous material
    sandwich circular plate
    variable parameters
    annular mass
    wibracje
    płyta wielowarstwowa
    zmienne parametry
    Opis:
    In the paper the influence function and the method of partial discretization in free axisymmetric vibration analysis of multilayered circular plates of constant and linearly variable thickness were presented. The effects of shear deformation and rotary inertia for the core as well as the facings were neglected. An analytical investigation based on the classical plate theory was made for the multilayered plate which satisfies Sokołowski’s condition. Discretization of mass and replacing stiffness of a fixed circular plate were presented. Formulas of influence matrix and Bernstein-Kieropian’s estimators for different steps of discretization were defined. The influence of variable distribution of parameters on the value of double estimators of natural basic and higher frequency of a sandwich circular plate was investigated.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2015, 20, 3; 617-627
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous effects of heat transfer and variable viscosity on peristaltic transport of casson fluid flow in an inclined porous tube
    Autorzy:
    Manjunatha, G.
    Rajashekhar, C.
    Vaidya, H.
    Prasad, K. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/266265.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    liczba Darcy'ego
    zmienna lepkość
    granica plastyczności
    Darcy number
    thermal slip
    velocity slip
    variable viscosity
    yield stress
    Opis:
    The present study investigates the combined effects of varying viscosity and heat transfer on a Casson fluid through an inclined porous axisymmetric tube in the presence of slip effects. The modeled governing equations are solved analytically by considering the long wavelength and small Reynolds number approximations. The numerical integration is employed to obtain pressure rise and frictional force. A parametric analysis has been presented to study the effects of the Darcy number, angle of inclination, varying viscosity, velocity slip, thermal slip, yield stress, amplitude ratio, Prandtl number and Eckert number on the pressure rise, pressure gradient, streamlines, frictional force and temperature. The study reveals that an increase in the angle of inclination and viscosity parameter has a proportional increase in the pressure rise. Also, an increase in the porosity causes a significant reduction in the pressure rise.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 309-328
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation absorption and chemical reaction effects on Rivlin-Ericksen flow past a vertical moving porous plate
    Autorzy:
    Sravanthi, C. S.
    Gorla, R. S. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/264592.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyn Rivlina-Ericksena
    absorpcja promieniowania
    reakcja chemiczna
    ssanie
    Rivlin-Ericksen fluid
    radiation absorption
    chemical reaction
    variable temperature
    concentration
    suction
    Opis:
    An analysis has been carried out to study the combined effects of radiation absorption and chemical reaction on an incompressible, electrically conducting and radiating flow of a Rivlin-Ericksen fluid along a semi-infinite vertical permeable moving plate in the presence of a transverse applied magnetic field. It is assumed that the suction velocity, the temperature and the concentration at the wall are exponentially varying with time. The dimensionless governing equations for this investigation are solved analytically using two-term harmonic and non-harmonic functions. A comparison is made with the available results in the literature for a special case and our results are in very good agreement with the known results. A parametric study of the physical parameters is made and results are presented through graphs and tables. The results indicate that the fluid velocity and temperature could be controlled by varying the radiation absorption.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 675-689
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Triple diffusive convection of a non-Newtonian fluid under the combined effect of compressibility and variable gravity
    Autorzy:
    Aggarwal, A. K.
    Dixit, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/265482.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    dyfuzja
    płyn Rivlina-Ericksena
    ściśliwość
    zmienna grawitacja
    triple diffusion
    Rivlin-Ericksen fluid
    suspended particles
    porous medium
    compressibility
    variable gravity
    Opis:
    In this paper, triple diffusive convection in a Rivlin-Ericksen fluid layer, which is permeated with suspended particles in the porous medium under the effect of compressibility and variable gravity, is investigated. Linear stability theory and normal mode analysis have been used to study the problem under consideration. It is observed that, for stationary convection, suspended particles, compressibility and medium permeability have destabilizing/stabilizing effects under certain conditions. The variable gravity parameter destabilizes the system whereas stable solute gradients have a stabilizing effect.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 1-11
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady three-dimensional MHD nanofluid flow over a stretching sheet with variable wall thickness and slip effects
    Autorzy:
    Kumar, G. Vinod
    Varma, S. V. K.
    Kumar, R. V. M. S. S. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/265665.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    pole magnetyczne
    magnetohydrodynamika
    poślizg
    unsteady flow
    magnetic field
    Buongiorno’s model
    variable wall thickness sheet
    velocity
    thermal and solutal slip
    Opis:
    The stretching sheets with variable thickness may occur in engineering applications more frequently than a flat sheet. Due to its various applications, in the present analysis we considered a three dimensional unsteady MHD nanofluid flow over a stretching sheet with a variable wall thickness in a porous medium. The effects of radiation, viscous dissipation and slip boundary conditions are considered. Buongiorno’s model is incorporated to study the combined effects of thermophoresis and Brownian motion. The dimensionless governing equations are solved by using MATLAB bvp4c package. The impact of various important flow parameters is presented and analysed through graphs and tables. It is interesting to note that all the three boundary layer thicknesses are diminished by slip parameters. Further, the unsteady parameter decreases the hydromagnetic boundary layer thickness.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 709-724
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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