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    Wyświetlanie 1-9 z 9
    Tytuł:
    Simultaneous chemical reactions effect on dispersion of a solute in peristaltic propulsion of a Newtonian fluid in an inclined channel with wall properties
    Autorzy:
    Dhange, M. Y.
    Sankad, G. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/266133.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    dyspersja
    lepki płyn
    napęd perystaltyczny
    dispersion
    inclined channel
    viscous fluid
    peristaltic propulsion
    wall properties
    Opis:
    In this paper, the dispersion of a solute in the peristaltic propulsion of an incompressible and viscous fluid through a permeable medium under the influence of wall properties with simultaneous homogeneous, heterogeneous chemical reactions in an inclined uniform channel has been studied. The issue is studied through conditions of Taylor’s limit and long wavelength hypothesis. The mean effective coefficient of scattering expression is computed and outcomes are interpreted physically through graphs.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 527-538
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady flow through a porous medium due to noncoaxial rotations of a porous disk and a fluid at infinity subjected to a periodic suction
    Autorzy:
    Guria, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/265060.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    ssanie
    lepki płyn
    tarcza porowata
    periodic suction
    non-coaxial
    eccentric
    oscillating
    rotating
    Opis:
    The unsteady flow of a viscous incompressible fluid due to non-coaxial rotations of a porous disk and a fluid at infinity subjected to a periodic suction through a porous medium has been studied. The velocity field, shear stresses are obtained in closed form. The variations of primary and secondary velocities for different values of non dimensional parameters are depicted in figures.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 401-411
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady/steady natural convection flow of reactive viscous fluid in a vertical annulus
    Autorzy:
    Jha, B. K.
    Samaila, A. K.
    Ajibade, A. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/265663.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    konwekcja naturalna
    lepki płyn
    egzotermiczna otulina
    unsteady/steady natural convection flow
    reactive viscous fluid
    exothermic
    open ended vertical annulus
    Opis:
    This paper presents both analytical and numerical analyses of a fully developed unsteady/steady natural convection flow of a reactive viscous fluid in an open ended vertical annulus. Analytical expressions for velocity, temperature, skin-friction and rate of heat transfer are obtained after simplifying and solving the governing differential equations with reasonable approximations. The interesting result found in this study is that an increase in non-dimensional time (t) , increases both temperature and velocity profiles until a steady-state value is attained. Subsequent results obtained by numerical calculations show excellent agreement with analytical results.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 73-83
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flow features of thermophoretic MHD viscous fluid flow past a converging channel with heat source and chemical reaction
    Autorzy:
    Kalita, B. K.
    Choudhury, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106445.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    płyn lepki
    termoforeza
    liczba Nusselta
    MHD
    viscous fluid
    heat source
    thermophoresis
    Nusselt number
    skin friction
    Opis:
    A boundary layer flow of an electrically conducting viscous fluid past a converging channel in the presence of thermophoresis, heat source, chemical reaction, viscous dissipation and simultaneous heat and mass transfer characteristics is studied in the paper. An external magnetic field of uniform strength is applied transversely to the channel. The similarity solution has been used to transform the partial differential equations that represent the problem into a boundary value problem of coupled ordinary differential equations, which in turn are solved numerically using MATLAB’s built in solver bvp4c. Numerical computations are carried out to solve the problem and graphical illustrations are made to get the physical insight of the same. The convergent channel flow problem of an incompressible electrically conducting viscous fluid in the presence of a magnetic field has a wide range of applicability in different areas of engineering, specially in industrial metal casting and control of molten metal flow.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 72--83
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three dimensional flow and mass transfer analysis of a second grade fluid in a porous channel with a lower stretching wall
    Autorzy:
    Khan, N. A.
    Naz, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/265824.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    równania różniczkowe
    płyn lepki
    pole przepływu
    second grade fluid
    stretching wall
    suction
    injection
    Opis:
    This investigation analyses a three dimensional flow and mass transfer of a second grade fluid over a porous stretching wall in the presence of suction or injection. The equations governing the flow are attained in terms of partial differential equations. A similarity transformation has been utilized for the transformation of partial differential equations into the ordinary differential equations. The solutions of the nonlinear systems are given by the homotopy analysis method (HAM). A comparative study with the previous results of a viscous fluid has been made. The convergence of the series solution has also been considered explicitly. The influence of admissible parameters on the flows is delineated through graphs and appropriate results are presented. In addition, it is found that instantaneous suction and injection reduce viscous drag on the stretching sheet. It is also shown that suction or injection of a fluid through the surface is an example of mass transfer and it can change the flow field.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 359-376
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional MHD boundary layer flow due to an axisymmetric shrinking sheet with radiation, viscous dissipation and heat source/sink
    Autorzy:
    Madhu, M.
    Balaswamy, B.
    Kishan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/265263.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    promieniowanie
    lepki płyn
    przenoszenie ciepła
    axisymmetric shrinking sheet
    dual solution
    radiation
    viscous dissipation
    FEM
    Opis:
    An analysis is made to study a three dimensional MHD boundary layer flow and heat transfer due to a porous axisymmetric shrinking sheet. The governing partial differential equations of momentum and energy are transformed into self similar non-linear ordinary differential equations by using the suitable similarity transformations. These equations are, then solved by using the variational finite element method. The flow phenomena is characterised by the magnetic parameter M, suction parameter S, porosity parameter Kp, heat source/sink parameter Q, Prandtl number Pr, Eckert number Ec and radiation parameter Rd. The numerical results of the velocity and temperature profiles are obtained and displayed graphically.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 393-406
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical investigation of vortex wake patterns of laminar flow around two side-by-side cylinders
    Autorzy:
    Nguyen, Van Luc
    Ho, Duy Khanh
    Powiązania:
    https://bibliotekanauki.pl/articles/27309846.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    viscous fluid
    vortex shedding
    vortex wake pattern
    vortex-in-cell method
    two side-by-side cylinders
    lepki płyn
    wir
    wzór budzenia wirowego
    metoda wirowania w komórce
    Opis:
    The laminar flow around two side-by-side circular cylinders was numerically investigated using a vortex-in-cell method combined with a continuous-forcing immersed boundary method. The Reynolds number (Re) of the flow was examined in the range from 40 to 200, and the distance between the cylinders varies from 1.2D to 6D, where D is the cylinder diameter. Simulation results show that the vortex wake is classified into eight patterns, such as single-bluff-body, meandering-motion, steady, deflected-in-one-direction, flip-flopping, anti-phase-synchronization, in-phase-synchronization, and phase-difference-synchronization, significantly depending on the Re, the cylinder distance, and the initial external disturbance effects. The anti-phase-synchronization, in-phase-synchronization, and phase-difference-synchronization vortex patterns can be switched at a low Re after a long time evolution of the flow. In particular, the single-bluff-body and flip-flopping vortex patterns excite the oscillation amplitude of the drag and lift coefficients exerted on the cylinders
    Źródło:
    Archive of Mechanical Engineering; 2022, LXIX, 3; 541--565
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of rotation on the onset of electrohydrodynamic instability of an elastico-viscous dielectric fluid layer
    Autorzy:
    Rana, G. C.
    Chand, R.
    Sharma, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/199843.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Walters' fluid
    (model B’ fluid
    rotation
    AC electric field
    electrohydrodynamics
    viscosity
    viscoelasticity
    rotacja
    pole elektryczne
    elektrohydrodynamika
    lepkość
    lepkosprężystość
    płyn Waltersa
    elasto-lepki płyn Waltersa
    Opis:
    In this paper the combined effect of uniform rotation and AC electric field on the onset of instability in a horizontal layer of an elastico-viscous fluid stimulated by the dielectrophoretic force due to the variation of dielectric constant with temperature is studied. Walters’ (model B’) fluid model is used to describe rheological behaviour of an elastico-viscous fluid. The onset criterions for stationary and oscillatory convection are derived for the case of free-free boundaries. It is observed that Walters’ (model B’) fluid behaves like an ordinary Newtonian fluid and rotation has stabilizing influence whereas AC electric field has destabilizing influence on the stability of the system. The necessary condition for the occurrence of oscillatory convection is also obtained. The present results are in good agreement with the earlier published results.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 143-149
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical computation of low Reynolds number viscous flow past bluff bodies
    Autorzy:
    Tarafder, Md. Shahjada
    Mursaline, Miad Al
    Powiązania:
    https://bibliotekanauki.pl/articles/1839825.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przepływ
    płyn lepki
    liczba Reynoldsa
    współczynnik oporu
    viscous flow
    low Reynolds number
    SIMPLE algorithm
    circular cylinder
    square cylinder
    drag coefficient
    Opis:
    This article presents a two-dimensional steady viscous flow simulation past circular and square cylinders at low Reynolds numbers (based on the diameter) by the finite volume method with a non-orthogonal body-fitted grid. Diffusive fluxes are discretized using central differencing scheme, and for convective fluxes upwind and central differencing schemes are blended using a ‘deferred correction’ approach. A simplified pressure correction equation is derived, and proper under-relaxation factors are used so that computational cost is reduced without adversely affecting the convergence rate. The governing equations are expressed in Cartesian velocity components and solution is carried out using the SIMPLE algorithm for collocated arrangement of variables. The mesh yielding grid-independent solution is then utilized to study, for the very first time, the effect of the Reynolds number on the separation bubble length, separation angle, and drag coefficients for both circular and square cylinders. Finally, functional relationships between the computed quantities and Reynolds number (Re) are proposed up to Re = 40. It is found that circular cylinder separation commences between Re= 6.5-6.6, and the bubble length, separation angle, total drag vary as Re, Re-0.5, Re-0.5 respectively. Extrapolated results obtained from the empirical relations for the circular cylinder show an excellent agreement with established data from the literature. For a square cylinder, the bubble length and total drag are found to vary as Re and Re-0.666, and are greater than these for a circular cylinder at a given Reynolds number. The numerical results substantiate that a square shaped cylinder is more bluff than a circular one.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 3; 133-157
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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