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    Wyświetlanie 1-11 z 11
    Tytuł:
    Analogy between thermal and mass diffusion effects of a free convective flow in rectangular enclosure
    Autorzy:
    Ambethkar, Vusala
    Powiązania:
    https://bibliotekanauki.pl/articles/1839737.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    free convective flow
    thermal diffusion effects
    mass diffusion effects
    rectangular enclosure
    average Nusselt number
    average Sherwood number
    empirical correlations
    swobodny przepływ konwekcyjny
    efekty dyfuzji termicznej
    efekty dyfuzji masowej
    korelacje empiryczne
    średnia liczba Sherwooda
    średnia liczba Nusselta
    Opis:
    In this investigation, the analogy between thermal and mass diffusive effects of a free convective flow in a rectangular enclosure is emphasized. The upwind finite volume method is used to discretize the governing equations of the continuity, momentum, energy and mass transfer. The novelty in this exploration is to appropriately modify the well-known Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithm so that it suits to the present problem and thereby, the new flow variables such as the temperature and the concentration are computed. An empirical correlation for the average Sherwood number (Sh) that does not exist in literature is suggested in this work. The average Sherwood numbers for distinct fluids (gases and liquids) are calculated, and mass diffusion effects within the horizontal rectangle are analyzed. The average Nusselt numbers (Nu) are calculated for distinct fluids such as liquids (Pr ≫1), liquid metals (Pr≪1) and gases (Pr < 1) for different Rayleigh numbers in the range of 3x105 ≤ RaL ≤ 7x10 9 from relevant empirical correlations existing in the literature. Accordingly, the thermal diffusion effects within the horizontal rectangle are analyzed.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 5-20
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analogy between thermal and mass diffusion effects of a free convective flow in rectangular enclosure
    Autorzy:
    Ambethkar, Vusala
    Powiązania:
    https://bibliotekanauki.pl/articles/1839750.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    free convective flow
    thermal diffusion effects
    mass diffusion effects
    rectangular enclosure
    average Nusselt number
    average Sherwood number
    empirical correlations
    swobodny przepływ konwekcyjny
    efekty dyfuzji termicznej
    efekty dyfuzji masowej
    korelacje empiryczne
    średnia liczba Sherwooda
    średnia liczba Nusselta
    Opis:
    In this investigation, the analogy between thermal and mass diffusive effects of a free convective flow in a rectangular enclosure is emphasized. The upwind finite volume method is used to discretize the governing equations of the continuity, momentum, energy and mass transfer. The novelty in this exploration is to appropriately modify the well-known Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithm so that it suits to the present problem and thereby, the new flow variables such as the temperature and the concentration are computed. An empirical correlation for the average Sherwood number (Sh) that does not exist in literature is suggested in this work. The average Sherwood numbers for distinct fluids (gases and liquids) are calculated, and mass diffusion effects within the horizontal rectangle are analyzed. The average Nusselt numbers (Nu) are calculated for distinct fluids such as liquids (Pr ≫1), liquid metals (Pr≪1) and gases (Pr < 1) for different Rayleigh numbers in the range of 3x105 ≤ RaL ≤ 7x10 9 from relevant empirical correlations existing in the literature. Accordingly, the thermal diffusion effects within the horizontal rectangle are analyzed.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 5-20
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD and thermal radiation effects on exponentially accelerated isothermal vertical plate with uniform mass diffusion
    Autorzy:
    Muthucumaraswamy, R.
    Visalakshi, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/265445.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie
    izotermiczność
    płyta pionowa
    dyfuzja masy
    pole magnetyczne
    radiation
    isothermal
    vertical plate
    mass diffusion
    magnetic field
    Opis:
    Thermal radiation effects on an unsteady free convective flow of a viscous incompressible flow of a past an exponentially accelerated infinite isothermal vertical plate with uniform mass diffusion in the presence magnetic field are considered. The fluid considered here is a gray, absorbing-emitting radiation but a non-scattering medium. The plate temperature is raised to Tw and the concentration level near the plate is also raised to Cʹw . An exact solution to the dimensionless governing equations is obtained by the Laplace transform method, when the plate is exponentially accelerated with a velocity u= u0 exp(aʹtʹ) in its own plane against gravitational field. The effects of velocity, temperature and concentration fields are studied for different physical parameters such as the magnetic field parameter, thermal radiation parameter, Schmidt number, thermal Grashof number, mass Grashof number and time. It is observed that the velocity increases with decreasing magnetic field parameter or radiation parameter. But the trend is just reversed with respect to a or t .
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 599-608
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hall effects and rotation effects on MHD flow past an exponentially accelerated vertical plate with combined heat and mass transfer effects
    Autorzy:
    Thamizhsudar, M.
    Pandurangan, J.
    Mathucumaraswamy, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/265402.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    Hall effect
    MHD flow
    rotation
    exponentially
    accelerated plate
    temperature
    mass diffusion
    magnetohydrodynamika
    pole magnetyczne
    prędkość osiowa
    Opis:
    A theoretical solution of flow past an exponentially accelerated vertical plate in the presence of Hall current and MHD relative to a rotating fluid with uniform temperature and mass diffusion is presented. The dimensionless equations are solved using the Laplace method. The axial and transverse velocity, temperature and concentration fields are studied for different parameters such as the Hall parameter (m), Hartmann number (M), Rotation parameter (Ω), Schmidt number, Prandtl number, thermal Grashof number (Gr) and mass Grashof number (Gc). It has been observed that the temperature of the plate decreases with increasing values of the Prandtl number and the concentration near the plate increases with decreasing values of Schmidt number. It is also observed that both axial and transverse velocities increase with decreasing values of the magnetic field parameter or rotation parameter, but the trend gets reversed with respect to the Hall parameter. The effects of parameters m, M, […], Gr and Gc on the axial and transverse velocity profiles are shown graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2015, 20, 3; 605-616
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First order chemical reaction effects on exponentially accelerated vertical plate with variable mass diffusion in the presence of thermal radiation
    Autorzy:
    Muthucumaraswamy, R.
    Lakshmi, C. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/264881.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    exponential
    radiation
    isothermal
    vertical plate
    heat and mass transfer
    promieniowanie
    izoterma
    wymiana ciepła
    wymiana masy
    Opis:
    Effects of transfer of mass and free convection on the flow field of an incompressible viscous fluid past an exponentially accelerated vertical plate with variable surface temperature and mass diffusion are studied. Results for velocity, concentration, temperature are obtained by solving governing equations using the Laplace transform technique. It is observed that the velocity increases with decreasing values of the chemical reaction parameter or radiation parameter. But the trend is just reversed with respect to the time parameter. The skin friction is also studied.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2015, 20, 2; 329-344
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation effects on MHD flow past an impulsively started infinite vertical plate with mass diffusion
    Autorzy:
    Chandrakala, P.
    Narayana Bhaskar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/955319.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie
    pole magnetyczne
    płyta pionowa
    radiation
    magnetic field
    vertical plate
    finite differences
    Opis:
    The effects of thermal radiation on a flow past an impulsively started infinite vertical plate in the presence of a magnetic field have been studied. The fluid considered is a gray, absorbing-emitting radiation but non-scattering medium. The dimensionless governing equations are solved by an efficient, more accurate, unconditionally stable and fast converging implicit scheme. The effects of velocity and temperature for different parameters such as the thermal radiation, magnetic field, Schmidt number, thermal Grashof number and mass Grashof number are studied. It is observed that the velocity decreases in the presence of thermal radiation or a magnetic field.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2014, 19, 1; 17-26
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD and rotation effects on flow past an accelerated vertical plate with variable temperature and mass diffusion in the presence of chemical reaction
    Autorzy:
    Muthucumaraswamy, R.
    Dhanasekar, N.
    Eswara Prasad, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/955271.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przyspieszenie
    izoterma
    płyta pionowa
    wymiana ciepła
    dyfuzja
    pole magnetyczne
    reakcja chemiczna
    rotation
    accelerated
    isothermal
    vertical plate
    heat transfer
    diffusion
    magnetic field
    chemical reaction
    Opis:
    An exact analysis of rotation effects on an unsteady flow of an incompressible and electrically conducting fluid past a uniformly accelerated infinite isothermal vertical plate, under the action of a transversely applied magnetic field is presented. The plate temperature is raised linearly with time and the concentration level near the plate is also raised to C’w. The dimensionless governing equations are solved using the Laplace-transform technique. The velocity profiles, temperature and concentration are studied for different physical parameters such as the magnetic field parameter, chemical reaction parameter, thermal Grashof number, mass Grashof number, Schmidt number, Prandtl number and time. It is observed that the velocity increases with increasing values of the thermal Grashof number or mass Grashof number. It is also observed that the velocity increases with decreasing values of the magnetic field parameter or rotation parameter Ω.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1087-1097
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical reaction effects on MHD flow past a linearly accelerated vertical plate with variable temperature and mass diffusion in the presence of thermal radiation
    Autorzy:
    Muthucumaraswamy, R.
    Geetha, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/264827.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    izotermiczność
    promieniowanie
    płyta pionowa
    wymiana masy
    wymiana ciepła
    pole magnetyczne
    reakcja chemiczna
    accelerated
    isothermal
    radiation
    vertical plate
    heat and mass transfer
    magnetic field
    chemical reaction
    Opis:
    An exact solution of first order chemical reaction effects on a radiative flow past a linearly accelerated infinite isothermal vertical plate with variable mass diffusion, under the action of a transversely applied magnetic field has been presented. The plate temperature is raised linearly with time and the concentration level near the plate is also raised to C'w linearly with time. The dimensionless governing equations are tackled using the Laplace-transform technique. The velocity, temperature and concentration fields are studied for different physical parameters such as the magnetic field parameter, radiation parameter, chemical reaction parameter, thermal Grashof number, mass Grashof number, Schmidt number, Prandtl number and time. It is observed that velocity increases with decreasing magnetic field parameter or radiation parameter. But the trend is just reversed with respect to the chemical reaction parameter.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 727-737
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation effect on MHD blood flow through a tapered porous stenosed artery with thermal and mass diffusion
    Autorzy:
    Sharma, M.
    Gaur, R. K.
    Sharma, B. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/266195.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przepływ krwi
    reakcja chemiczna
    magnetohydrodynamika
    Soret and Dufour effects
    MHD
    blood flow
    stenosis
    chemical reaction
    Opis:
    A mathematical model for MHD blood flow through a stenosed artery with Soret and Dufour effects in the presence of thermal radiation has been studied. A uniform magnetic field is applied perpendicular to the porous surface. The governing non-linear partial differential equations have been transformed into linear partial differential equations, which are solved numerically by applying the explicit finite difference method. The numerical results are presented graphically in the form of velocity, temperature and concentration profiles. The effects of various parameters such as the Reynolds number, Hartmann number, radiation parameter, Schmidt number and Prandtl number, Soret and Dufour parameter on the velocity, temperature and concentration have been examined with the help of graphs. The present results have an important bearing on the therapeutic procedure of hyperthermia, particularly in understanding/regulating blood flow and heat transfer in capillaries.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 411-423
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical reaction effects on MHD flow past an impulsively started isothermal vertical plate with uniform mass diffusion
    Autorzy:
    Chandrakala, P.
    Narayana Bhaskar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/955191.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    technika numeryczna
    płyny lepkie
    płyta pionowa
    metoda elementów skończonych
    chemical reaction
    magnetic field
    infinite vertical plate
    finite differences
    Opis:
    A numerical technique is employed to derive a solution to the transient natural convection flow of an incompressible viscous fluid past an impulsively started infinite isothermal vertical plate with uniform mass diffusion in the presence of a magnetic field and homogeneous chemical reaction of first order. The governing equations are solved using implicit finite-difference method. The effects of velocity, temperature and concentration for different parameters such as the magnetic field parameter, chemical reaction parameter, Prandtl number, Schmidt number, thermal Grashof number and mass Grashof number are studied. It is observed that the fluid velocity decreases with increasing the chemical reaction parameter and the magnetic field parameter.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2014, 19, 2; 419-426
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hall effects on isothermal vertical plate with uniform mass diffusion in the presence of rotating fluid and chemical reaction of first order
    Autorzy:
    Dhananjeya Kumaar, V. S. A.
    Muthucumaraswamy, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/265031.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    Hall effect
    chemical reaction parameter
    rotating fluid
    angular velocity
    efekt Halla
    reakcja chemiczna
    prędkość kątowa
    Opis:
    An exact solution of the combined study of Hall effects on a vertical plate with a rotating fluid in the presence of a homogeneous chemical reaction of first order has been analysed. The dimensionless governing coupled partial differential equations are tackled using the usual Laplace transform technique. The sway of the Hall parameter, Hartmann number, Grashof number, Prandtl number, Schmidt number, chemical reaction parameter on the axial velocity and concentration of the fluid has been depicted graphically. When the non-dimensional angular velocity, Ω=2M21+m.2, the transverse velocity component vanishes, thereby the axial velocity of the fluid attains the maximum value. It is noted that with increase in the Hall parameter, thermal Grashof number and mass Grashof number, the axial velocity of the fluid increases significantly.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 1; 111-121
    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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