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Wyszukujesz frazę "Darcy number" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    On the onset of thermal convection in a layer of Oldroydian visco-elastic fluid saturated by Brinkman–Darcy porous medium
    Autorzy:
    Chand, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/178803.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    thermal instability
    Oldroydian viscoelastic fluid
    Brinkman–Darcy number
    Prandtl–Darcy number
    Opis:
    Thermal instability in a horizontal layer of Oldroydian visco-elastic fluid in a porous medium is investigated. For porous medium the Brinkman–Darcy model is considered. A linear stability analysis based upon perturbation method and normal mode technique is used to find solution of the fluid layer confined between two free-free boundaries. The onset criterion for stationary and oscillatory convection is derived analytically. The influence of the Brinkman–Darcy, Prandtl–Darcy number, stress relaxation parameter on the stationary and oscillatory convection is studied both analytically and graphically. The sufficient condition for the validity of PES has also been derived.
    Źródło:
    Studia Geotechnica et Mechanica; 2015, 37, 4; 3-10
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous effects of heat transfer and variable viscosity on peristaltic transport of casson fluid flow in an inclined porous tube
    Autorzy:
    Manjunatha, G.
    Rajashekhar, C.
    Vaidya, H.
    Prasad, K. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/266265.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    liczba Darcy'ego
    zmienna lepkość
    granica plastyczności
    Darcy number
    thermal slip
    velocity slip
    variable viscosity
    yield stress
    Opis:
    The present study investigates the combined effects of varying viscosity and heat transfer on a Casson fluid through an inclined porous axisymmetric tube in the presence of slip effects. The modeled governing equations are solved analytically by considering the long wavelength and small Reynolds number approximations. The numerical integration is employed to obtain pressure rise and frictional force. A parametric analysis has been presented to study the effects of the Darcy number, angle of inclination, varying viscosity, velocity slip, thermal slip, yield stress, amplitude ratio, Prandtl number and Eckert number on the pressure rise, pressure gradient, streamlines, frictional force and temperature. The study reveals that an increase in the angle of inclination and viscosity parameter has a proportional increase in the pressure rise. Also, an increase in the porosity causes a significant reduction in the pressure rise.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 309-328
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport of MHD couple stress fluid through peristalsis in a porous medium under the influence of heat transfer and slip effects
    Autorzy:
    Sankad, G. C.
    Nagathan, P. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/266102.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    peristaltic flow
    couple stress fluid
    Darcy number
    slip parameter
    compliant walls
    przepływ perystaltyczny
    liczba Darcy'ego
    parametr poślizgu
    Opis:
    An attempt has been made to examine the effects of magnetohydrodynamic couple stress fluid in peristaltic flow with porous medium under the impact of slip, heat transfer and wall properties. The expressions are obtained for temperature, coefficient of heat transfer and velocity. Influences of different parameters, the Hartmann number, Brinkman number and adaptability parameters on the temperature and warmth trade coefficient are discussed through outlines.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2017, 22, 2; 403-414
    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
    Tytuł:
    Heat transfer in Darcy-Forchheimer flow of tangent hyperbolic fluid over an inclined plate with Joule heating
    Autorzy:
    Purna Chandar Rao, Darapuneni
    Thiagarajan, Swaminathan
    Srinivasa Kumar, Vajha
    Powiązania:
    https://bibliotekanauki.pl/articles/2141500.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    inclined plate
    tangent hyperbolic fluid
    Darcy-Forchheimer
    Joule heating
    shooting strategy
    Eckert number
    ciepło Joule'a
    liczba Eckerta
    Opis:
    Tangent hyperbolic fluid is one of the non-Newtonian fluids in which the constitutive equation is valid for low and high shear rates and used mostly in laboratory experiments and industries. The Darcy-Forchheimer flow model is substantial in the fields where the high flow rate effect is the common phenomenon, for instance, in petroleum engineering. With these things in mind, in this article, we analysed the mixed convective dissipative Darcy-Forchheimer flow of tangent hyperbolic fluid by an inclined plate with Joule heating. Flow administering equations were altered as nonlinear ODEs and then resolved using shooting strategy. Pertinent outcomes are explained through graphs. It is discovered that fluid velocity minifies with the rise in the power law index parameter and Forchheimer number. It is detected that the thermal buoyancy parameter minimizes fluid temperature, and the magnetic field parameter ameliorates the same. What’s more, we noticed that Forchheimer number minimizes the skin friction coefficient, and the heat transfer rate is minified with the larger Eckert number. Furthermore, we have verified our results with former results for the Nusselt number and noticed a satisfactory agreement.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 3; 31-40
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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