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Wyszukujesz frazę "Madasu, Krishna Prasad" wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Drag force of a porous particle moving axisymmetrically in a closed cavity of micropolar fluid
    Autorzy:
    Madasu, Krishna Prasad
    Powiązania:
    https://bibliotekanauki.pl/articles/122694.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    micropolar fluid
    Stokes flow
    sphere
    concentric
    drag force
    płyn mikropolarny
    prawo Stokesa
    siła tarcia
    siła hydrodynamiczna
    przepływ pełzający
    Opis:
    The present paper deals with the problem of an incompressible axisymmetric creeping flow caused by a porous spherical particle in a spherical cavity filled with micropolar fluid. Depending on the kind of cell model, appropriate boundary conditions are used on the surface of sphere and spherical cavity. Drag force on the porous particle in the presence of a cavity is calculated to determine the correction factor to the Stokes law. A general expression for the hydrodynamic force acting on the porous sphere and, hence, for the wall correction factor of the sphere are obtained. The special cases of the porous sphere in viscous fluid, zero permeability solid sphere in micropolar fluid and viscous fluid are obtained in open and closed cavity respectively.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 4; 41-51
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slow flow past a weakly permeable spheroidal particle in a hypothetical cell
    Autorzy:
    Bucha, Tina
    Madasu, Krishna Prasad
    Powiązania:
    https://bibliotekanauki.pl/articles/1845038.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    permeable spheroid
    cell model
    Stokes law
    Darcy’s law
    BJSJ condition
    sferoida przepuszczalna
    model komórki
    prawo Stokesa
    prawo Darcy'ego
    warunek BJSJ
    Opis:
    The perspective of the current analysis is to represent the incompressible viscous flow past a low permeable spheroid contained in a fictitious spheroidal cell. Stokes approximation and Darcy’s equation are adopted to govern the flow in the fluid and permeable zone, respectively. Happel’s and Kuwabara’s cell models are employed as the boundary conditions at the cell surface. At the fluid porous interface, we suppose the conditions of conservation of mass, balancing of pressure component at the permeable area with the normal stresses in the liquid area, and the slip condition, known as Beavers-Joseph-Saffman-Jones condition to be well suitable. A closed-form analytical expression for hydrodynamic drag on the bounded spheroidal particle is determined and therefore, mobility of the particle is also calculated, for both the case of a prolate as well as an oblate spheroid. Several graphs and tables are plotted to observe the dependence of normalized mobility on pertinent parameters including permeability, deformation, the volume fraction of the particle, slip parameter, and the aspect ratio. Significant results that influence the impact of the above parameters in the problem have been pointed out. Our work is validated by referring to previous results available in literature as reduction cases.
    Źródło:
    Archive of Mechanical Engineering; 2021, LXVIII, 2; 119-146
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slow flow of couple stress fluid past a cylinder embedded in a porous medium: slip effect
    Autorzy:
    Sarkar, Priya
    Madasu, Krishna Prasad
    Powiązania:
    https://bibliotekanauki.pl/articles/38911649.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    couple stress fluid
    cylinder
    Brinkman’s equation
    saturated porous medium
    slip coefficients
    drag force
    Opis:
    An analytical study for the creeping flow of a couple stress fluid past a cylinder embedded in a porous medium is presented using the slip condition. The uniform flow is considered far away from a cylinder. The boundary conditions used are zero couple stress and tangential slip conditions. The modified Bessel functions represent the stream function (the velocity). The drag exerted on a solid cylinder immersed in a porous medium is derived. The impacts of the couple stress, permeability, and slip parameters on the normalized drag force are presented graphically. The drag forces of well-known exceptional cases are reduced. The drag force is a decreasing function of the permeability and couple stress parameters and an increasing function of the slip parameter.
    Źródło:
    Engineering Transactions; 2023, 71, 4; 537-551
    0867-888X
    Pojawia się w:
    Engineering Transactions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Couple stress fluid past a sphere embedded in a porous medium
    Autorzy:
    Madasu, Krishna Prasad
    Sarkar, Priya
    Powiązania:
    https://bibliotekanauki.pl/articles/2065761.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sphere
    couple stress fluid
    saturated porous medium
    Brinkman’s equation
    drag force
    kula
    równanie Brinkmana
    siła tarcia
    Opis:
    This paper concerns the analytical investigation of the axisymmetric and steady flow of incompressible couple stress fluid through a rigid sphere embedded in a porous medium. In the porous region, the flow field is governed by Brinkman’s equation. Here we consider uniform flow at a distance from the sphere. The boundary conditions applied on the surface of the sphere are the slip condition and zero couple stress. Analytical solution of the problem in the terms of stream function is presented by modified Bessel functions. The drag experienced by an incompressible couple stress fluid on the sphere within the porous medium is calculated. The effects of the slip parameter, the couple stress parameter, and permeability on the drag are represented graphically. Special cases of viscous flow through a sphere are obtained and the results are compared with earlier published results.
    Źródło:
    Archive of Mechanical Engineering; 2022, LXIX, 1; 5--19
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slip flow of a sphere in non-concentric spherical hypothetical cell
    Autorzy:
    Krishna-Prasad, Madasu
    Powiązania:
    https://bibliotekanauki.pl/articles/1839769.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Stokes flow
    rigid sphere
    non-concentric
    drag force
    slip condition
    przepływ Stokesa
    siła tarcia
    współczynnik poślizgu
    współczynnik korekcji
    Opis:
    Slow axisymmetric flow of an incompressible viscous fluid caused by a slip sphere within a non-concentric spherical cell surface is investigated. The uniform velocity (Cunningham’s model) and tangential velocity reaches minimum along a radial direction are imposed conditions at the cell surface (Kvashnin’s model). The general solution of the problem is combined using superposition of the fundamental solution in the two spherical coordinate systems based on the centers of the slip sphere and spherical cell surface. Numerical results for the correction factor on the inner sphere are obtained with good convergence for various values of the relative distance between the centers of the sphere and spherical cell, the slip coefficient, and the volume fraction. The obtained results are in good agreement with the published results. The effect of concentration is more in the Cunningham’s model compared to the Kvashnin’s model. The wall correction factor on the no-slip sphere is more compared to that of a slip sphere. The correction factor on the slip sphere is more than that of a spherical gas bubble.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 3; 59-70
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analytical study of couple stress fluid through a sphere with an influence of the magnetic field
    Autorzy:
    Krishna Prasad, Madasu
    Sarkar, Priya
    Powiązania:
    https://bibliotekanauki.pl/articles/2202037.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    creeping flow
    sphere
    magnetic effect
    couple stress fluid
    drag
    przepływ pełzający
    kula
    efekt magnetyczny
    Opis:
    The present work concerns to study of the steady, axisymmetric slow flow of couple stress fluid through a rigid sphere in the transverse magnetic field. Boundary conditions on the sphere surface are the zero couple stress condition and tangential slip condition. The stream function, vorticity vector, and pressure term are obtained. The drag acting on the sphere in the presence of MHD is calculated. Here, we graphically represented the Hartmann number, couple stress, and slip parameters effect on the drag coefficient. Some well-known results of the drag are deduced.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 3; 99--110
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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