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Wyszukujesz frazę "Kálal, M." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Role of initial vapor density in Z-pinch polyacetal capillary discharge
    Autorzy:
    Vrba, P.
    Vrbová, M.
    Kálal, M.
    Janačárek, A.
    Fojtík, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146587.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    capillary discharge
    electrical discharge
    laser ablation
    snow-plow model
    Z-pinch
    Opis:
    An analysis of a Z-pinch in a capillary discharge is presented. It is supposed that the capillary is filled with a material ablated from the wall using a subnanosecond laser pulse of an energy of several tens of milijoules. The optimum initial atom density N0 has been found.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 25-27
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and theoretical investigations of crater formation in an aluminium target in a PALS experiment
    Autorzy:
    Borodziuk, S.
    Doskach, I.
    Gus'kov, S.
    Jungwirth, K.
    Kálal, M.
    Kasperczuk, A.
    Kralikova, B.
    Krousky, E.
    Limpouch, J.
    Masek, K.
    Pfeifer, M.
    Pisarczyk, P.
    Pisarczyk, T.
    Rohlena, K.
    Rozanov, V.
    Skala, J.
    Ullschmied, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147967.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    laser-produced plasma
    crater
    absorption of laser radiation
    resonance mechanism
    inverse bremsstrahlung
    interferometry
    fast electrons
    Opis:
    Experimental and theoretical results of investigations of the iodine laser - Al solid target interactions on the PALS (Prague Asterix Laser System) facility are presented. The experimental investigations of laser interaction with massive Al targets devoted to shock wave propagation in solids and crater formation physics are presented. Experiments were performed with the use of high intensity laser pulses (1013 15 W/cm2) for two laser wavelengths (0.438 mi m and 1.315 mi m) and four laser beam radii (from 35 mi m up to 600 ěm). The crater dimensions were measured using optical microscopy and a wax-replica technique. Plasma expansion out of the target was measured via three-frame interferometry. Theoretical model of the postpulse crater formation by the shock wave propagating and decaying in solids after the end of the laser pulse is presented and applied for the explanation of the results obtained in experiments.
    Źródło:
    Nukleonika; 2004, 49, 1; 7-14
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of the Bubble Size Distribution in an Aerated Stirred Tank: Theoretical and Numerical Comparison of Different Breakup Models
    Autorzy:
    Kálal, Z.
    Jahoda, M.
    Fořt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/185190.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CFD
    mieszanie
    ciecz-gaz
    mixing
    gas-liquid
    population balance
    bubble breakup
    Opis:
    The main topic of this study is the mathematical modelling of bubble size distributions in an aerated stirred tank using the population balance method. The air-water system consisted of a fully baffled vessel with a diameter of 0.29 m, which was equipped with a six-bladed Rushton turbine. The secondary phase was introduced through a ring sparger situated under the impeller. Calculations were performed with the CFD software CFX 14.5. The turbulent quantities were predicted using the standard k-ε turbulence model. Coalescence and breakup of bubbles were modelled using the MUSIG method with 24 bubble size groups. For the bubble size distribution modelling, the breakup model by Luo and Svendsen (1996) typically has been used in the past. However, this breakup model was thoroughly reviewed and its practical applicability was questioned. Therefore, three different breakup models by Martínez-Bazán et al. (1999a, b), Lehr et al. (2002) and Alopaeus et al. (2002) were implemented in the CFD solver and applied to the system. The resulting Sauter mean diameters and local bubble size distributions were compared with experimental data.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 3; 331-348
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CFD prediction of gas-liquid flow in an aerated stirred vessel using the population balance model
    Autorzy:
    Kálal, Z.
    Jahoda, M.
    Fořt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/185765.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CFD
    mixing tank
    gas-liquid
    drag correction
    bubble size distribution
    zbiornik mieszający
    gaz-ciecz
    korekta przeciągania
    rozkład wielkości pęcherzyków
    Opis:
    The main topic of this study is the experimental measurement and mathematical modelling of global gas hold-up and bubble size distribution in an aerated stirred vessel using the population balance method. The air-water system consisted of a mixing tank of diameter T= 0.29 m, which was equipped with a six-bladed Rushton turbine. Calculations were performed with CFD software CFX 14.5. Turbulent quantities were predicted using the standard k-ε turbulence model. Coalescence and breakup of bubbles were modelled using the homogeneous MUSIG method with 24 bubble size groups. To achieve a better prediction of the turbulent quantities, simulations were performed with much finer meshes than those that have been adopted so far for bubble size distribution modelling. Several different drag coefficient correlations were implemented in the solver, and their influence on the results was studied. Turbulent drag correction to reduce the bubble slip velocity proved to be essential to achieve agreement of the simulated gas distribution with experiments. To model the disintegration of bubbles, the widely adopted breakup model by Luo & Svendsen was used. However, its applicability was questioned.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 1; 55-73
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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