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Wyszukujesz frazę "Kelvin-Helmholtz instability" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Physical and Numerical Investigations of Mould Flux Entrainment into Liquid Steel
    Autorzy:
    Jowsa, J.
    Bielnicki, M.
    Cwudziński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353162.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    slag entrainment
    Kelvin-Helmholtz instability
    water-oil investigations
    numerical simulation
    particle image velocimetry
    Opis:
    This paper presents results of model tests, performed in order to analyze phenomenon of slag droplets entrainment into steel in mould, during continuous casting process. The carried out studies took the form of laboratory experiments using physical model, in which – using similarity criteria – the behaviour of interfacial boundary liquid steel-liquid slag has been simulated using water and silicon oils, differing in physicochemical properties. Additionally, based on PIV (Particle Image Velocimetry) measurements and numerical simulations, vector flow field and values of critical velocities, at which observed the occurrence of interfacial boundary silicon oil-water instability have been identified. Based on the carried out investigations, results, that illustrate relationship between critical entrainment velocity and physicochemical properties of oils have been presented.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 2043-2050
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kelvin-Helmholtz instabilities in the Colorado River Delta, Gulf of California
    Autorzy:
    Carbajal, N.
    Vargas, J.T.
    Rodriguez, J.H.G.
    Montano Ley, Y.
    Salas de Leon, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078904.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Kelvin-Helmholtz instability
    Colorado River Delta
    tidal current
    bottom sediment
    bathymetry
    suspended sediment
    satellite image
    Opis:
    In the Colorado River Delta, the interaction of tidal currents and sea-bottom sediment formed, in geological times, large-scale seabed patterns known as sandbanks. These patterns are oriented along the delta, almost parallel to the dominant tidal flow, with the bathymetry having an undulating character across the delta. Calculations and analysis showed that the interaction of tidal currents with the bathymetry causes velocity shears, faster flowing over the ridges than in the troughs. Kelvin-Helmholtz instabilities emerge from the velocity shear, and a large amount of suspended sediment makes the instabilities visible in satellite images. The physical and dynamic conditions allowed us to find an explanation for the existence of these Kelvin-Helmholtz instabilities. Since sandbanks have been observed in different seas such as the North Sea, The Gulf of Korea, the Gulf of Khambhat in India, the Jiangsu coast in China, the Persian Gulf, and Moreton Bay in Australia, the results suggest the existence of instabilities in these areas. Satellite images, intense tidal currents, undulating topography, and suspended sediment made it possible to explain the generation and identification of KelvinHelmholtz instabilities.
    Źródło:
    Oceanologia; 2021, 63, 3; 321-328
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effective interfacial tension effect on the instability of streaming Rivlin-Ericksen elastico-viscous fluid flow through a porous medium
    Autorzy:
    Singh, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/265395.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    niestabilność Kelvina-Helmholtza
    płyn Rivlina-Ericksena
    lepkość
    porowatość
    Kelvin-Helmholtz instability
    Rivlin-Ericksen elastico-viscous fluids in porous medium
    Opis:
    The instability of the plane interface between two uniform, superposed and streaming Rivlin-Ericksen elastico-viscous fluids through porous media, including the ‘effective interfacial tension’ effect, is considered. In the absence of the ‘effective interfacial tension’ stability/instability of the system as well as perturbations transverse to the direction of streaming are found to be unaffected by the presence of streaming if perturbations in the direction of streaming are ignored, whereas for perturbation in all other directions, there exists instability for a certain wave number range. The ‘effective interfacial tension’ is able to suppress this Kelvin-Helmholtz instability for small wavelength perturbations, the medium porosity reduces the stability range given in terms of a difference in streaming velocities.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 221-229
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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