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    Wyświetlanie 1-8 z 8
    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:
    Radiation and chemical reaction effects on MHD flow along a moving vertical porous plate
    Autorzy:
    Reddy, G. V. R.
    Reddy, N. B.
    Gorla, R. S. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/265207.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    porowatość
    promieniowanie cieplne
    wymiana ciepła
    wymiana masy
    reakcja chemiczna
    MHD
    porous medium
    thermal radiation
    heat and mass transfer
    chemical reaction
    Opis:
    This paper presents an analysis of the effects of magnetohydrodynamic force and buoyancy on convective heat and mass transfer flow past a moving vertical porous plate in the presence of thermal radiation and chemical reaction. The governing partial differential equations are reduced to a system of self-similar equations using the similarity transformations. The resultant equations are then solved numerically using the fourth order Runge-Kutta method along with the shooting technique. The results are obtained for the velocity, temperature, concentration, skin-friction, Nusselt number and Sherwood number. The effects of various parameters on flow variables are illustrated graphically, and the physical aspects of the problem are discussed.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 157-168
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Melting heat transfer and MHD boundary layer flow of Eyring-Powell nanofluid over a nonlinear stretching sheet with slip
    Autorzy:
    Reddy, N. V. B.
    Kishan, N.
    Reddy, C. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265493.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyn Eyringa-Powella
    przenikanie ciepła
    magnetohydrodynamika
    nanofluid
    termoforeza
    Eyring-Powell fluid
    melting heat transfer
    MHD
    stretching sheet
    Brownian motion
    thermophoresis
    Opis:
    The steady laminar incompressible viscous magneto hydrodynamic boundary layer flow of an Eyring- Powell fluid over a nonlinear stretching flat surface in a nanofluid with slip condition and heat transfer through melting effect has been investigated numerically. The resulting nonlinear governing partial differential equations with associated boundary conditions of the problem have been formulated and transformed into a non-similar form. The resultant equations are then solved numerically using the Runge-Kutta fourth order method along with the shooting technique. The physical significance of different parameters on the velocity, temperature and nanoparticle volume fraction profiles is discussed through graphical illustrations. The impact of physical parameters on the local skin friction coefficient and rate of heat transfer is shown in tabulated form.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 1; 161-178
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD effects on non-Newtonian power-law fluid past a continuously moving porous flat plate with heat flux and viscous dissipation
    Autorzy:
    Kishan, N.
    Shashidar Reddy, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/264635.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wpływ pola magnetycznego
    płyn nienewtonowski
    magnetic field effects
    non-Newtonian fluid
    power-law index
    viscous dissipation and suction/injection
    Opis:
    The problem of a magneto-hydro dynamic flow and heat transfer to a non-Newtonian power-law fluid flow past a continuously moving flat porous plate in the presence of sucion/injection with heat flux by taking into consideration the viscous dissipation is analysed. The non-linear partial differential equations governing the flow and heat transfer are transformed into non-linear ordinary differential equations using appropriate transformations and then solved numerically by an implicit finite difference scheme. The solution is found to be dependent on various governing parameters including the magnetic field parameter M, power-law index n, suction/injection parameter ƒw, Prandtl number Pr and Eckert number Ec. A systematical study is carried out to illustrate the effects of these major parameters on the velocity profiles, temperature profile, skin friction coefficient and rate of heat transfer and the local Nusslet number.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 425-445
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Comparison of Four New ARIMA-ANN Prediction Models on Internet Traffic Data
    Autorzy:
    Babu, C. N.
    Reddy, B. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/308269.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    ANN
    ANN training
    ARIMA
    Box-Jenkins methodology
    hybrid ARIMA-ANN model
    Internet traffic forecasting
    Opis:
    Prediction of Internet traffic time series data (TSD) is a challenging research problem, owing to the complicated nature of TSD. In literature, many hybrids of auto-regressive integrated moving average (ARIMA) and artificial neural networks (ANN) models are devised for the TSD prediction. These hybrid models consider such TSD as a combination of linear and non-linear components, apply combination of ARIMA and ANN in some manner, to obtain the predictions. Out of the many available hybrid ARIMA-ANN models, this paper investigates as to which of them suits better for Internet traffic data. This suitability of hybrid ARIMA-ANN models is studied for both one-step ahead and multistep ahead prediction cases. For the purpose of the study, Internet traffic data is sampled at every 30 and 60 minutes. Model performances are evaluated using the mean absolute error and mean square error measurement. For one-step ahead prediction, with a forecast horizon of 10 points and for three-step prediction, with a forecast horizon of 12 points, the moving average filter based hybrid ARIMA-ANN model gave better forecast accuracy than the other compared models.
    Źródło:
    Journal of Telecommunications and Information Technology; 2015, 1; 67-75
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined effects of Soret and Dufour on MHD flow of a power-law fluid over flat plate in slip flow rigime
    Autorzy:
    Saritha, K.
    Rajasekhar, M. N.
    Reddy, B. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/265391.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    liczba Prandtla
    warunki granicy poślizgu
    zjawisko Dufoura
    power-law fluid
    Soret and Dufour number
    slip boundary conditions
    finite difference method
    Prandtl number
    Opis:
    A numerical model is developed to study the Soret and Dufour effects on MHD boundary layer flow of a power-law fluid over a flat plate with velocity, thermal and solutal slip boundary conditions. The governing equations for momentum, energy and mass are transformed to a set of non-linear coupled ordinary differential equations by using similarity transformations. These non-linear ordinary differential equations are first linearized using a quasi-linearization technique and then solved numerically based on the implicit finite difference scheme over the entire range of physical parameters with appropriate boundary conditions. The influence of various governing parameters along with velocity, thermal and mass slip parameters on velocity, temperature and concentration fields are examined graphically. Also, the effects of slip parameters, the Soret and Dufour number on the skin friction, Nusselt number and Sherwood number are studied. Results show that the increase in the Soret number leads to a decrease in the temperature distribution and to an increase in concentration fields.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 3; 689-705
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibrations in a fluid-loaded poroelastic hollow cylinder surrounded by a fluid in plane-strain form
    Autorzy:
    Shanker, B.
    Nath, C. N.
    Shah, S. A.
    Reddy, P. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/265190.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    teoria Biota
    częstotliwość
    wibracje
    prędkość fazowa
    Biot's theory
    fluid-loaded poroelastic cylinder
    frequency
    planestrain vibrations
    phase velocity
    Opis:
    Plane-strain vibrations in a fluid-loaded poroelastic hollow cylinder surrounded by a fluid are investigated employing Biot’s theory of wave propagation in poroelastic media. The poroelastic hollow cylinder is homogeneous and isotropic, while the inner and outer fluids are homogeneous, isotropic and inviscid. The frequency equation of the fluid-loaded poroelastic cylinder surrounded by a fluid is obtained along with several particular cases, namely, fluid-loaded poroelastic cylinder, fluid-loaded bore, poroelastic cylinder surrounded by a fluid and poroelastic solid cylinder submerged in a fluid. The frequency equations are obtained for axially symmetric, flexural and anti-symmetric vibrations each for a pervious and an impervious surface. Nondimensional frequency for propagating modes is computed as a function of the ratio of thickness to the inner radius of the core. The results are presented graphically for two types of poroelastic cylinders and then discussed.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 189-216
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD free convection-radiation interaction in a porous medium - part II: soret/dufour effects
    Autorzy:
    Vasu, B.
    Gorla, Rama Subba Reddy
    Murthy, P. V. S. N.
    Prasad, V. R.
    Beg, O. A.
    Siddiqa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/266156.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    materiały porowate
    pole magnetyczne
    magnetohydrodynamika
    non-Darcy porous media transport
    magnetic field
    horizontal circular cylinder
    Soret number
    Dufour number
    Opis:
    This paper is focused on the study of two dimensional steady magnetohydrodynamics heat and mass transfer by laminar free convection from a radiative horizontal circular cylinder in a non-Darcy porous medium by taking into account of the Soret/Dufour effects. The boundary layer equations, which are parabolic in nature, are normalized into non-similar form and then solved numerically with the well-tested, efficient, implicit, stable Keller–Box finite-difference scheme. Numerical results are obtained for the velocity, temperature and concentration distributions, as well as the local skin friction, Nusselt number and Sherwood number for several values of the parameters, namely the buoyancy ratio parameter, Prandtl number, Forchheimer number, magnetohydrodynamic body force parameter, Soret and Dufour numbers. The dependency of the thermophysical properties has been discussed on the parameters and shown graphically. Increasing the Forchheimer inertial drag parameter reduces velocity but elevates temperature and concentration. Increasing the Soret number and simultaneously reducing the Dufour number greatly boosts the local heat transfer rate at the cylinder surface. A comparative study of the previously published and present results in a limiting sense is made and an excellent agreement is found between the results.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 2; 157-175
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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