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Wyszukujesz frazę "heat generation" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Viscous dissipation and Joule heating effects on MHD flow of a Thermo-Solutal stratified nanofluid over an exponentially stretching sheet with radiation and heat generation/absorption
    Autorzy:
    Murugesan, Thiagarajan
    Kumar, M. Dinesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1075514.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nanofluid
    double stratification
    exponentially stretching sheet
    heat generation/absorption
    viscous-ohmic dissipation
    Opis:
    The present study is focused on the influence of viscous and joules dissipation on magnetohydrodynamic flow of a double-stratified nanofluid past an exponentially stretching sheet in the presence of thermal radiation and heat generation/absorption effects. The governing nonlinear partial differential equations are transformed into a system of nonlinear ordinary differential equations using similarity variables and then solved numerically for these equations is procured by employing the Nachtsheim-Swigert shooting technique scheme together with Runge-Kutta Fourth-Order method. A parametric analysis has been carried out to investigate the impacts of physical parameters taken in the problem. The pattern worked for the nanofluid transport equations unified the impacts of thermophoresis and Brownian motion. Numerical results are obtained for the velocity, temperature and concentration in the boundary layer region is studied in elaborate. The impact of physical interest such as local skin friction coefficient, local nusselt number, and local Sherwood number are also investigated numerically and are tabulated. It is remarked that Schmidt number and thermal stratification parameter decreases the dimensionless temperature, during the solutal stratification parameter decreases the dimensionless concentration.
    Źródło:
    World Scientific News; 2019, 129; 193-210
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of thermal radiation and heat generation on hydromagnetic flow of nanofluid over an exponentially stretching sheet in a porous medium with viscous dissipation
    Autorzy:
    Murugesan, Thiagarajan
    Kumar, M. Dinesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1059429.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    MHD
    Nanofluid
    exponentially stretching sheet
    heat generation
    porous medium
    thermal radiation
    viscous dissipation
    Opis:
    This paper studies, the impacts of heat generation on MHD flow of radiative nanofluid over an exponentially stretching sheet in a porous medium with viscous dissipation are numerically analyzed. Two sorts of nanofluids, generated by solid nanoparticles with water such as alumina-water nanofluid and silver-water nanofluid were investigated. With the use of similarity transformations, to obtain a system of nonlinear ordinary differential equations. The resulting boundary value problem is solved numerically using the Nachtsheim-Swigert shooting technique scheme together with fourth-order Runge-Kutta integration method. Numerical results are obtained for the velocity, temperature distribution and concentration profiles for selected values of the governing physical parameters of combined magnetic interaction and porosity parameter, heat generation parameter, viscous dissipation parameter, thermal radiation parameter, solid volume fraction parameter, chemical reaction parameter and Lewis number are discussed. Quantities of engineering interest such as Skin friction coefficient, Nusselt number, and Sherwood number are also obtained numerically and are tabulated.
    Źródło:
    World Scientific News; 2019, 128, 2; 130-147
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Internal Heat Generation on the Thermal Stability of a Porous Fin
    Autorzy:
    Sobamowo, M. G.
    Jayesimi, L. O.
    Waheed, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031875.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Differential Transformation Method
    Porous Fin
    Temperature-Dependent Internal Heat Generation
    Thermal analysis
    Thermal performance
    Opis:
    In this study, the effects of internal heat generation on thermal stability of porous fin is theoretical investigated using differential transform method. The parametric studies reveal increase in the internal heat generation leads to increase in the value or the range of the thermal stability of the fin. The internal heat generation can be used to control the thermal instability in the fin. Also, as the porosity parameter increase, the rate of heat transfer from the base of the fin and consequently improve the efficiency of the fin increase. However, a high value or an excessive internal heat generation results in an undesirable situation where some of the heat energy cannot escape to the sink and instead ends up flowing into the prime surface and the fin tends to store heat rather than dissipating it. This scenario defeats the prime purpose of the cooling fin. Therefore, the operational parameters must be carefully selected to ensure that the fin retains its primary purpose of removing heat from the primary surface.
    Źródło:
    World Scientific News; 2020, 149; 110-127
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Further Study on Thermal Performance of Porous Fin with Temperature-Dependent Thermal Conductivity and Internal Heat Generation using Galerkin’s method of Weighted Residual
    Autorzy:
    Sobamowo, M. G.
    Kamiyo, O. M.
    Adeleye, O. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046542.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Galerkin’s method of weighted residual
    Porous Fin
    Surface convective heat transfer
    Temperature-Dependent Thermal Conductivity and Internal Heat Generation
    Thermal performance
    Opis:
    This work is presented as a further study to our previous work, “Thermal performance analysis of a natural convection porous fin with temperature-dependent thermal conductivity and internal heat" published in "Thermal Science and Engineering Progress. 1 (2017) 39–52”, where it was assumed that the surface convection is negligible and heat is transferred only by natural convection in the porous fin. In this present study, such an assumption has been relaxed. Also, effects of surface convective heat transfer on the thermal performance of porous fin with temperature-dependent thermal conductivity and internal heat generation have been investigated using Galerkin’s method of weighted residual. The results of the Galerkin’s method of weighted residual show excellent agreement with the results of numerical method using shooting method coupled with Runge-Kutta method and also with the results of homotopy perturbation method. Thereafter, the developed analytical solutions are used to investigate the influences of the thermal model parameters on the thermal performance of the porous fin. It is found as the with the other model parameters that as the convective parameter increases, the rate of heat transfer from the base of the fin increases and consequently, the porous fin efficiency improves. However, increase in the nonlinear thermal conductivity parameter decreases the temperature distribution in the fin. Based on the high accuracy of the Galerkin’s method of weighted residual as displayed in this work, it is hoped that the simple analytical solutions given by the approximate analytical method will enhance the analysis of extended surfaces and also assist the designers.
    Źródło:
    World Scientific News; 2019, 138, 2; 167-191
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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