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Wyszukujesz frazę "źródło masy" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Przepływy wilgoci w zasolonych ścianach
    Flows of moisture in salteted walls
    Autorzy:
    Kubik, J.
    Kucharczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/362916.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Fizyki Budowli Katarzyna i Piotr Klemm
    Tematy:
    fizyka budowli
    bilans masy
    źródło masy
    osuszanie
    zasolenie
    building physics
    source of the mass
    drying
    salinity
    Opis:
    W referacie przedstawiono wpływ zasolenia na zmiany właściwości materiałów. Podjęto próbę oszacowania źródła masy hydratów w wyniku cyklicznego nasączania -suszenia.
    In this paper the influence of salinity on the changes of the propriety of materials was introduced. The source of the mass of hydrate was estimated in the result of cyclic drying. Experiment was also conducted witch defines the source of the mass.
    Źródło:
    Fizyka Budowli w Teorii i Praktyce; 2007, T. 2; 161-164
    1734-4891
    Pojawia się w:
    Fizyka Budowli w Teorii i Praktyce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient one-dimensional model of coal carbonization in a stagnant packed bed
    Autorzy:
    Polesek-Karczewska, S.
    Kardaś, D.
    Grucelski, A.
    Stelmach, S.
    Wardach-Święcicka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/240628.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbonization
    coking process
    coal charge evaporation
    mass source
    pyrolytic gases
    uwęglenie
    proces koksowania
    odparowanie
    źródło masy
    gaz pirolityczny
    Opis:
    In the present paper, the one-dimensional model for heat and mass transfer in fixed coal bed was proposed to describe the thermal and flow characteristics in a coke oven chamber. For the purpose of the studied problem, the analysis was limited to the calculations of temperature field and pyrolytic gas yield. In order to verify the model, its theoretical predictions for temperature distribution during wet coal charge carbonization were compared with the measurement results found in the literature. In general, the investigation shows good qualitative agreement between numerical and experimental data. However, some discrepancy regarding the temperature characteristics at the stage of evaporation was observed.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 2; 39-51
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A general study of fundamental solutions in aniotropicthermoelastic media with mass diffusion and voids
    Autorzy:
    Chawla, Vijay
    Kamboj, Deepmala
    Powiązania:
    https://bibliotekanauki.pl/articles/1839675.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    termosprężystość
    dyfuzja masy
    źródło ciepła
    general solution
    fundamental solution
    thermoelastic
    voids
    mass diffusion
    Opis:
    The present paper deals with the study of a fundamental solution in transversely isotropic thermoelastic media with mass diffusion and voids. For this purpose, a two-dimensional general solution in transversely isotropic thermoelastic media with mass diffusion and voids is derived first. On the basis of the obtained general solution, the fundamental solution for a steady point heat source on the surface of a semi-infinite transversely isotropic thermoelastic material with mass diffusion and voids is derived by nine newly introduced harmonic functions. The components of displacement, stress, temperature distribution, mass concentration and voids are expressed in terms of elementary functions and are convenient to use. From the present investigation, some special cases of interest are also deduced and compared with the previous results obtained, which prove the correctness of the present result.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 22-41
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of chemical reaction and radiation on double diffusive flow of a viscous, dissipative fluid through porous medium in a rectangular cavity with heat sources
    Autorzy:
    Raju, T. L.
    Muralidhar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/955281.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wymiana ciepła
    wymiana masy
    promieniowanie
    rozproszenie
    źródło ciepła
    heat and mass transfer flow
    radiation
    dissipation
    heat sources
    rectangular cavity
    porous medium
    Opis:
    In this paper, an attempt is made to discuss the combined influence of radiation and dissipation on the convective heat and mass transfer flow of a viscous fluid through a porous medium in a rectangular cavity using the Darcy model. Making use of the incompressibility, the governing non-linear coupled equations for the momentum, energy and diffusion are derived in terms of the non-dimensional stream function, temperature and concentration. The Galerkin finite element analysis with linear triangular elements is used to obtain the global stiffness matrices for the values of stream function, temperature and concentration. These coupled matrices are solved using an iterative procedure and expressions for the stream function, temperature and concentration are obtained as linear combinations of the shape functions. The behavior of temperature, concentration, the Nusselt number and Sherwood number is discussed computationally for different values of the governing parameters, such as the Rayleigh Number (Ra), heat source parameter (α), Eckert number (Ec), Schmidt Number (Sc), Soret parameter (S0), buoyancy ratio (N).
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1115-1150
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A numerical method for viscous flow in a driven cavity with heat and concentration sources placed on its side wall
    Autorzy:
    Ambethkar, V.
    Basumatary, L. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/122794.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    numerical method
    viscous flow
    heat source
    concentration source
    driven square cavity
    general algorithm
    stability conditions
    isotherms
    streamlines
    geometric center
    heat and mass transfer
    metoda numeryczna
    lepki przepływ
    źródło ciepła
    warunki stabilności
    izotermy
    transfer ciepła
    transfer masy
    Opis:
    This paper proposes a method to numerically study viscous incompressible two-dimensional steady flow in a driven square cavity with heat and concentration sources placed on its side wall. The method proposed here is based on streamfunction-vorticity (Ψ-ξ) formulation. We have modified this formulation in such a way that it suits to solve the continuity, x and y-momentum, energy and mass transfer equations which are the governing equations of the problem under investigation in this study. No-slip and slip wall boundary conditions for velocity, temperature and concentration are defined on walls of a driven square cavity. In order to numerically compute the streamfunction Ψ, vorticityfunction ξ , temperature θ, concentration C and pressure P at different low, moderate and high Reynolds numbers, a general algorithm was proposed. The sequence of steps involved in this general algorithm are executed in a computer code, developed and run in a C compiler. We propose that, with the help of this code, one can easily compute the numerical solutions of the flow variables such as velocity, pressure, temperature, concentration, streamfunction, vorticityfunction and thereby depict and analyze streamlines, vortex lines, isotherms and isobars, in the driven square cavity for low, moderate and high Reynolds numbers. We have chosen suitable Prandtl and Schmidt numbers that enables us to define the average Nusselt and Sherwood numbers to study the heat ad mass transfer rates from the left wall of the cavity. The stability criterion of the numerical method used for solving the Poisson, vorticity transportation, energy and mass transfer has been given. Based on this criterion, we ought to choose appropriate time and space steps in numerical computations and thereby, we may obtain the desired accurate numerical solutions. The nature of the steady state solutions of the flow variables along the horizontal and vertical lines through the geometric center of the square cavity has been discussed and analyzed. To check the validity of the computer code used and corresponding numerical solutions of the flow variables obtained from this study, we have to compare these with established steady state solutions existing in the literature and they have to be found in good agreement.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 3; 17-30
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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