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Wyszukujesz frazę "thermal field" wg kryterium: Temat

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    Wyświetlanie 1-11 z 11
    Tytuł:
    On thermal instability of Kuvshiniski fluid with suspended particles saturated in a porous medium in the presence of a magnetic field
    Autorzy:
    Singh, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/265476.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    thermal convection
    Kuvshiniski fluid
    suspended particles
    magnetic field
    porous medium
    Opis:
    The thermal instability of a Kuvshiniski viscoelastic fluid is considered to include the effects of a uniform horizontal magnetic field, suspended particles saturated in a porous medium. The analysis is carried out within the framework of the linear stability theory and normal mode technique. For the case of stationary convection, the Kuvshiniski viscoelastic fluid behaves like a Newtonian fluid and the magnetic field has a stabilizing effect, whereas medium permeability and suspended particles are found to have a destabilizing effect on the system, oscillatory modes are introduced in the system, in the absence of these the principle of exchange of stabilities is valid. Graphs in each case have been plotted by giving numerical values to the parameters, depicting the stability characteristics. Sufficient conditions for the avoidance of overstability are also obtained.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 981-994
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laminar mixed convection flow from a vertical surface with induced magnetic field and convective boundary
    Autorzy:
    Chaudhary, K.
    Sharma, A.
    Jha, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/264352.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie cieplne
    absorpcja promieniowania
    pole magnetyczne
    thermal radiation
    radiation absorption
    convective boundary
    induced magnetic field
    Opis:
    The objective of this investigation is to study the influence of thermal radiation and radiation absorption parameter on a mixed convection flow over a continuously moving porous vertical plate under the action of transverse applied magnetic field taking into account the induced magnetic field with convective boundary. Under certain assumptions, the solutions for the velocity field, temperature distribution and induced magnetic field are obtained. The influences of various parameters on the velocity, temperature fields and on induced magnetic fields are studied graphically. It is also found that the dimensionless Prandtl number, Grashof number, Schmidt number and magnetic parameter have an appreciable influence on the independent variables.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 307-326
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compressible analysis of Bénard convection of magneto rotatory couple-stress fluid
    Autorzy:
    Mehta, C. B.
    Singh, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/264669.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konwekcja termiczna
    pole magnetyczne
    rotacja
    ściśliwość
    couple-stress fluid
    compressibility
    rotation
    magnetic field
    thermal convection
    Opis:
    Thermal Instability (Benard’s Convection) in the presence of uniform rotation and uniform magnetic field (separately) is studied. Using the linearized stability theory and normal mode analyses the dispersion relation is obtained in each case. In the case of rotatory Benard’s stationary convection compressibility and rotation postpone the onset of convection whereas the couple-stress have duel character onset of convection depending on rotation parameter. While in the absence of rotation couple-stress always postpones the onset of convection. On the other hand, magnetic field on thermal instability problem on couple-stress fluid for stationary convection couple-stress parameter and magnetic field postpones the onset of convection. The effect of compressibility also postpones the onset of convection in both cases as rotation and magnetic field. Graphs have been plotted by giving numerical values to the parameters to depict the stationary characteristics. Further, the magnetic field and rotation are found to introduce oscillatory modes which were non-existent in their absence and then the principle of exchange of stability is valid. The sufficient conditions for non-existence of overstability are also obtained.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 1; 91-105
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical reaction and MHD flow for magnetic field effect on heat and mass transfer of fluid flow through a porous medium onto a moving vertical plate
    Autorzy:
    Goud, B. Shankar
    Nandeppanavar, Mahantesh M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174194.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    reakcja chemiczna
    pole magnetyczne
    promieniowanie cieplne
    MHD
    chemical reaction
    Keller box method
    magnetic field
    thermal radiation
    Opis:
    This article discusses the effect of heat and mass transfer in a boundary layer flow in the presence of a magnetic field of an electrically conducting and viscous fluid as it passes through a porous medium containing a heat source and a chemical reaction. By employing similarity variables, the governing equations are changed into nonlinear ordinary differential equations(ODEs). To solve the obtained equations numerically the Keller box method is used. Numerical and graphical representations of the results of different parameter values governing the flow system are given. The non-dimensional distributions of velocity, heat, and concentration are depicted graphically, while the Nusselt number, Sherwood number, and skin friction are determined numerically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 2; 226--244
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of magnetic field on thermal instability of Oldroydian viscoelastic rotating fluid in porous medium
    Autorzy:
    Thakur, R. C.
    Rana, G. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/265340.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    pole magnatyczne
    materiały porowate
    rotacja
    niestabilność termiczna
    magnetic field
    Oldroydian viscoelastic fluid
    porous medium
    rotation
    thermal instability
    Opis:
    In this paper, we investigate the effect of a vertical magnetic field on thermal instability of an Oldroydian visco-elastic rotating fluid in a porous medium. By applying the normal mode analysis method, the dispersion relation governing the effects of rotation, magnetic field and medium permeability is derived and solved analytically and numerically. For the case of stationary convection, the Oldroydian viscoelastic fluid behaves like an ordinary Newtonian fluid and it is observed that rotation has a stabilizing effect while the magnetic field and medium permeability have a stabilizing/destabilizing effect under certain conditions on thermal instability of the Oldroydian viscoelastic fluid in a porous medium. The oscillatory modes are introduced due to the presence of rotation, the magnetic field and gravity field. It is also observed that the ‘principle of exchange of stability’ is invalid in the presence of rotation and the magnetic field.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 555-569
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On a couple-stress Rivlin-Ericksen ferromagnetic fluid heated from below with varying gravity, rotation, magnetic field and suspended particles flowing through a porous medium
    Autorzy:
    Rahul
    Sharma, Naveen
    Powiązania:
    https://bibliotekanauki.pl/articles/2174204.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    niestabilność termiczna
    pole magnetyczne
    płyn ferromagnetyczny
    naprężenie
    thermal instability
    magnetic field
    couple-stress fluid
    ferromagnetic fluid
    suspended particles
    Opis:
    The thermal instability of a couple-stress Rivlin-Ericksen ferromagnetic fluid with varying gravity field, suspended particles, rotation and magnetic field flowing through a porous medium is investigated. The dispersion relation has been developed and solved analytically using the normal mode approach and linear stability theory. The effect of suspended particles, rotation, couple stress, permeability and magnetic field on the fluid layer has been investigated. For stationary conventions, it is found that suspended particles always have a destabilizing effect for λ>0 and a stabilizing effect for λ<0 and couple-stress, magnetic field and permeability of the medium have a stabilizing effect on the thermal instability under certain conditions. In the absence of the rotation couple-stress has a stabilizing effect if λ >0 and a destabilizing effect if λ<0. Rotation has a stabilizing effect if λ >0 and a destabilizing effect if λ<0. In the absence of rotation permeability has a stabilizing effect if λ<0 and a destabilizing effect if λ>0. Magnetisation always has a stabilizing effect ( λ>0 or λ<0).
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 2; 177--198
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydromagnetic rarefied fluid flow over a wedge in the presence of surface slip and thermal radiation
    Autorzy:
    Das, K.
    Sharma, R. P.
    Duari, P. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/264410.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    convective flow
    heat transfer
    surface slip
    magnetic field
    thermal radiation
    przepływ konwekcyjny
    przenoszenie ciepła
    pole magnetyczne
    promieniowanie cieplne
    Opis:
    An analysis is presented to investigate the effects of thermal radiation on a convective slip flow of an electrically conducting slightly rarefied fluid, having temperature dependent fluid properties, over a wedge with a thermal jump at the surface of the boundary in the presence of a transverse magnetic field. The reduced equations are solved numerically using the finite difference code that implements the 3-stage Lobatto IIIa formula for the partitioned Runge-Kutta method. Numerical results for the dimensionless velocity and temperature as well as for the skin friction coefficient and the Nusselt number are presented through graphs and tables for pertinent parameters to show interesting aspects of the solution.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 827-837
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of thermal radiation and chemical reaction on MHD flow of blood in stretching permeable vessel
    Autorzy:
    Zigta, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839798.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    rozciąganie
    pole magnetyczne
    promieniowanie cieplne
    reakcja chemiczna
    stretching velocity
    similarity transformations
    time dependent magnetic field intensity
    thermal radiation
    chemical reaction
    Opis:
    This paper focuses on the theoretical analysis of blood flow in the presence of thermal radiation and chemical reaction under the influence of time dependent magnetic field intensity. Unsteady non linear partial differential equations of blood flow consider time dependent stretching velocity, the energy equation also accounts time dependent temperature of vessel wall and the concentration equation includes the time dependent blood concentration. The governing non linear partial differential equations of motion, energy and concentration are converted into ordinary differential equations using similarity transformations solved numerically by applying ode45. The effect of physical parameters, viz., the permeability parameter, unsteadiness parameter, Prandtl number, Hartmann number, thermal radiation parameter, chemical reaction parameter and Schmidt number on flow variables, viz., velocity of blood flow in vessel, temperature and concentration of blood, has been analyzed and discussed graphically. From the simulation study the following important results are obtained: velocity of blood flow increases with the increment of both permeability and unsteadiness parameter. The temperature of blood increases at the vessel wall as the Prandtl number and Hartmann number increase. Concentration of blood decreases as time dependent chemical reaction parameter and Schmidt number increases.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 198-211
    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
    Tytuł:
    Heat transfer effects on free convection of viscous dissipative fluid flow over an inclined plate with thermal radiation in the presence of induced magnetic field
    Autorzy:
    Kumar, P. Pramod
    Malga, Bala Siddulu
    Appidi, Lakshmi
    Matta, Sweta
    Powiązania:
    https://bibliotekanauki.pl/articles/1839898.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie cieplne
    pole magnetyczne
    konwekcja swobodna
    thermal radiation
    induced magnetic field
    magnetic Prandtl number
    free convection
    Galerkin finite element method
    viscous dissipation
    Opis:
    The principal objective of the present paper is to know the reaction of thermal radiation and the effects of magnetic fields on a viscous dissipative free convection fluid flow past an inclined infinite plate in the presence of an induced magnetic field. The Galerkin finite element technique is applied to solve the nonlinear coupled partial differential equations and effects of thermal radiation and other physical and flow parameters on velocity, induced magnetic field, along with temperature profiles are explained through graphs. It is noticed that as the thermal radiation increases velocity and temperature profiles decrease and the induced magnetic field profiles increases.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 1; 122-134
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Triple- diffusive convection in a micropolar ferrofluid in the presence of rotation
    Autorzy:
    Chand, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265647.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konwekcja
    konwekcja cieplna
    substancja rozpuszczalna
    pole magnetyczne
    namagnesowanie
    triple- diffusive convection
    micropolar ferrofluid
    thermal convection
    solute gradient
    vertical magnetic field
    rotation
    magnetization
    Opis:
    This paper deals with the theoretical investigation of the triple-diffusive convection in a micropolar ferrofluid layer heated and soluted below subjected to a transverse uniform magnetic field in the presence of uniform vertical rotation. For a flat fluid layer contained between two free boundaries, an exact solution is obtained. A linear stability analysis theory and normal mode analysis method have been employed to study the onset convection. The influence of various parameters like rotation, solute gradients, and micropolar parameters (i.e., the coupling parameter, spin diffusion parameter and micropolar heat conduction parameter) on the onset of stationary convection has been analyzed. The critical magnetic thermal Rayleigh number for the onset of instability is also determined numerically for sufficiently large value of the buoyancy magnetization parameter M1 (ratio of the magnetic to gravitational forces). The principle of exchange of stabilities is found to hold true for the micropolar fluid heated from below in the absence of micropolar viscous effect, microinertia, solute gradient and rotation. The oscillatory modes are introduced due to the presence of the micropolar viscous effect, microinertia , solute gradient and rotation, which were non-existent in their absence. In this paper, an attempt is also made to obtain the sufficient conditions for the non-existence of overstability.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 307-327
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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