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Wyszukujesz frazę "two fluids" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Plattnerite from Kupferschiefer, Poland, and its meaning for mineralizing conditions
    Plattneryt ze złóż Kupferschiefer w Polsce i jego znaczenie dla określenia warunków procesu mineralizacji siarczkowej
    Autorzy:
    Kucha, Henryk
    Powiązania:
    https://bibliotekanauki.pl/articles/27311277.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    plattnerite
    myrmekite
    mixing
    two fluids
    oxysulphide
    Eh-pH conditions
    Fore-Sudetic Monocline
    Opis:
    Plattnerite forms spectacular myrmekitic intergrowths with banded chalcopyrite. It is directly inter- grown with chalcopyrite, anglesite and less often cerussite. Simultaneous precipitation of PbO2, PbSO4 and PbCO3 requires a high activity of S and Eh values close to these found in the surficial environment. Alternatively, PbO2 was formed from Cu-Fe-Pb oxysulphide precursor, which broken down after precipitation into a fine mixture of hematite, plattnerite, anglesite, and minor cerussite all encompassed by banded chalcopyrite. The first possibility requires surficial fluids penetrating orezone and mixing with local reducing solutions. The second one can be reconciled with Eh–pH conditions of the Rotliegendes brines interacting with a local reducing solutions.
    Plattneryt tworzy spektakularne zrosty myrmekitowe z pasiastym chalkopirytem. Minerał ten jest bez- pośrednio zrośnięty z chalkopirytem, anglezytem i rzadziej z cerussytem. Równoczesna precypitacja PbO2, PbSO4 i PbCO3 może nastąpić tylko w przypadku wysokiej aktywności S i wysokich wartości Eh, zbliżonych do panujących w warunkach powierzchniowych. Druga możliwość powstania opisanych struktur to utworzenie PbO2 z prekursora oksysiarczkowego Cu-Pb-Fe, który rozpadł się po strąceniu na mikroskopową mieszaninę hematytu, plattnerytu, anglezytu z mniejszą ilością cerussytu zcementowaną pasiastym chalkopirytem. Pierwsza z wymienionych możliwości wymaga penetracji strefy złożowej przez roztwory powierzchniowe i ich mieszania się z lokalnymi redukcyjnymi roztworami. Druga możliwość mogła mieć miejsce w warunkach mieszania się dwu rotworów: jednego, będącego w równowadze z solankami porowymi Czerwonego Spągowca i drugiego, będącego lokalnym roztworem redukcyjnym.
    Źródło:
    Annales Societatis Geologorum Poloniae; 1998, 68, 4; 279--285
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for determination of flow at the plane, horizontal interface separating streams of two different fluids
    Autorzy:
    Prosnak, W. J.
    Cześnik, P. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/241051.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    interface
    almost parallel streams of two fluids
    boundary layer
    ordinary differential equations
    matching conditions
    Opis:
    The paper deals with the theoretical investigation of the phenomenon, which consists in generation - by wind - of the movement of water, the bodies of air and of water being separated by a horizontal, plane interface, which is identical with the free surface of water. A set of assumptions defining a physical model of the phenomenon, borrowed from Lock (1951), is introduced, as well as the mathematical description of this model. It reduces to a composite ordinary differential problem, containing two non-linear equations of the third order, which have to satisfy some boundary conditions. A novel method of solution of the differential problem just mentioned is presented in the paper. In the method use is made of exact formulae for coefficients of series representing the solution. The method seems to be competitive with the one given in the paper by Lock (1951).
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2005, 52, 2; 89-110
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady two-layered fluid flow of conducting fluids in a channel between parallel porous plates under transverse magnetic field in a rotating system
    Autorzy:
    Linga Raju, T.
    Neela Rao, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/264889.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    przepływ oscylacyjny
    porowatość
    magnetohydrodynamics
    two-layered fluids/immiscible fluids
    rotating fluids
    oscillating flow
    unsteady flow
    porous plates
    Opis:
    An unsteady MHD two-layered fluid flow of electrically conducting fluids in a horizontal channel bounded by two parallel porous plates under the influence of a transversely applied uniform strong magnetic field in a rotating system is analyzed. The flow is driven by a common constant pressure gradient in a channel bounded by two parallel porous plates, one being stationary and the other oscillatory. The two fluids are assumed to be incompressible, electrically conducting with different viscosities and electrical conductivities. The governing partial differential equations are reduced to the linear ordinary differential equations using two-term series. The resulting equations are solved analytically to obtain exact solutions for the velocity distributions (primary and secondary) in the two regions respectively, by assuming their solutions as a combination of both the steady state and time dependent components of the solutions. Numerical values of the velocity distributions are computed for different sets of values of the governing parameters involved in the study and their corresponding profiles are also plotted. The details of the flow characteristics and their dependence on the governing parameters involved, such as the Hartmann number, Taylor number, porous parameter, ratio of the viscosities, electrical conductivities and heights are discussed. Also an observation is made how the velocity distributions vary with the rotating hydromagnetic interaction in the case of steady and unsteady flow motions. The primary velocity distributions in the two regions are seen to decrease with an increase in the Taylor number, but an increase in the Taylor number causes a rise in secondary velocity distributions. It is found that an increase in the porous parameter decreases both the primary and secondary velocity distributions in the two regions.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 423-446
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MHD heat transfer in two-layered flow of conducting fluids through a channel bounded by two parallel porous plates in a rotating system
    Autorzy:
    Linga Raju, T.
    Neela Rao, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/264768.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    przenikanie ciepła
    porowatość
    MHD
    two-layered fluids/immiscible fluids
    unsteady flow
    heat transfer
    rigid rotation
    porous boundaries
    Opis:
    The paper aims to analyze the heat transfer aspects of a two-layered fluid flow in a horizontal channel under the action of an applied magnetic and electric fields, when the whole system is rotated about an axis perpendicular to the flow. The flow is driven by a common constant pressure gradient in the channel bounded by two parallel porous insulating plates, one being stationary and the other one oscillatory. The fluids in the two regions are considered electrically conducting, and are assumed to be incompressible with variable properties, namely, different densities, viscosities, thermal and electrical conductivities. The transport properties of the two fluids are taken to be constant and the bounding plates are maintained at constant and equal temperature. The governing partial differential equations are then reduced to the ordinary linear differential equations by using a two-term series. The temperature distributions in both fluid regions of the channel are derived analytically. The results are presented graphically to discuss the effect on the heat transfer characteristics and their dependence on the governing parameters, i.e., the Hartmann number, Taylor number, porous parameter, and ratios of the viscosities, heights, electrical and thermal conductivities. It is observed that, as the Coriolis forces become stronger, i.e., as the Taylor number increases, the temperature decreases in the two fluid regions. It is also seen that an increase in porous parameter diminishes the temperature distribution in both the regions.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 3; 623-648
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unsteady two-layered fluid flow and heat transfer of conducting fluids in a channel between parallel porous plates under transverse magnetic field
    Autorzy:
    Linga Raju, T.
    Nagavalli, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/264466.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    magnetohydrodynamika
    mieszanie płynów
    przepływ niestacjonarny
    ruch oscylacyjny
    przenikanie ciepła
    magnetohydrodynamics
    two-layered fluid flow/immiscible fluids
    unsteady flow
    oscillatory motion
    heat transfer
    porous plate
    Opis:
    The unsteady magnetohydrodynamic flow of two immiscible fluids in a horizontal channel bounded by two parallel porous isothermal plates in the presence of an applied magnetic and electric field is investigated. The flow is driven by a constant uniform pressure gradient in the channel bounded by two parallel insulating plates, one being stationary and the other oscillating, when both fluids are considered as electrically conducting. Also, both fluids are assumed to be incompressible with variable properties, viz. different viscosities, thermal and electrical conductivities. The transport properties of the two fluids are taken to be constant and the bounding plates are maintained at constant and equal temperatures. The governing equations are partial in nature, which are then reduced to the ordinary linear differential equations using two-term series. Closed form solutions for velocity and temperature distributions are obtained in both fluid regions of the channel. Profiles of these solutions are plotted to discuss the effect on the flow and heat transfer characteristics, and their dependence on the governing parameters involved, such as the Hartmann number, porous parameter, ratios of the viscosities, heights, electrical and thermal conductivities.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 699-726
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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