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    Wyświetlanie 1-2 z 2
    Tytuł:
    2D simulations of liquid percolation through model porous media: preliminary MD and DPD results
    Autorzy:
    Rychcik, M.
    Bośko, J.
    Rybicki, J.
    Alda, W.
    Dzwinel, W.
    Mancini, G.
    Fioretti, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964080.pdf
    Data publikacji:
    2001
    Wydawca:
    Politechnika Gdańska
    Tematy:
    2D flow simulations
    particle methods
    molecular dynamics
    dissipative particle dynamics method
    Opis:
    In the paper we make a short overview of computer models based on particle approach, which can be suitable for the simulation of fluid flow through porous media. We concentrate on Molecular Dynamics (MD) and Dissipative Particle Dynamics (DPD) methods. We describe main features of our simulation programs, and present and discuss preliminary results of MD and DPD simulations of 2D fluid flow through a simple model rigid porous media. The paper aims at the evaluation of the applicability of MD and DPD methods for simulations of liquid flows in media of complicated geometry.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 1; 85-97
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dispersion of colloidal agglomerate in mesoscale modelled by a hybrid fluid particle model elastic properties of the rectangular crystalline phase of planar hard cyclic pentamers
    Autorzy:
    Dzwinel, W.
    Yuen, D. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1965869.pdf
    Data publikacji:
    2001
    Wydawca:
    Politechnika Gdańska
    Tematy:
    fluid particle model
    mesoscopic flow
    colloidal agglomerate
    fragmentation
    agglomeration
    Opis:
    The dispersion of the agglomerating fluid process involving colloids has been investigated at the mesoscale level by a discrete particle approach - the hybrid fluid particle model (FPM). Dynamical processes occurring in the granulation of colloidal agglomerate in solvents are severely influenced by coupling between the dispersed microstructures and the global flow. On the mesoscale this coupling is further exacerbated by thermal fluctuations, particle-particle interactions between colloidal beds and hydrodynamic interactions between colloidal beds and the solvent. Using the method of FPM, we have tackled the problem of dispersion of a colloidal slab being accelerated in a long box filled with a fluid. Our results show that the average size of the agglomerated fragments decrease with increasing shearing rate gamma, according to the power-law A*gamma k, where k is around 2. For larger values of gamma, the mean size of the agglomerate S_avg increases slowly with gamma from the collisions between the aggregates and the longitudinal stretching induced by the flow. The proportionality constant A increases exponentially with the scaling factor of the attractive forces acting between the colloidal particles. The value of A shows a rather weak dependence on the solvent viscosity. However, A increases proportionally with the scaling factor of the colloid-solvent dissipative interactions. These results may be applied to enhance our understanding concerning the nonlinear complex interaction occurring in mesoscopic flows such as blood flow in small vessels.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 3; 355-371
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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