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    Wyświetlanie 1-6 z 6
    Tytuł:
    CFD analysis of mixing intensity in jet stirred reactors
    Autorzy:
    Gil, I.
    Mocek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/185797.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kinetyka
    CFD
    jet stirred reactor
    kinetic
    reaction design
    Opis:
    The homogeneous stirred reactor designed for kinetic studies of the combustion of hydrocarbons with intensive internal recirculation in high temperature combustion chamber is described. The originality of our reactor lies in its construction which allows to intensively mix fuel and flue gases, measure gas temperature as well as obtain samples which can be used to investigate diffusion flames. The cylindrical construction enables to use the reactor in laboratory cylindrical electrically heated ovens. The CFD analysis of the reactors, the mixing parameters (turbulent Peclet number and mixing level) and the volume average temperature in the reactors were elaborated on the basis of the typical dimensions of classical reactors to kinetics research as well as the own reactor design. The results of the analysis allow to reveal advantages of our construction.
    Źródło:
    Chemical and Process Engineering; 2012, 33, 3; 397-410
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation on the course of complex processes carried out in vortex impinging jet reactors
    Autorzy:
    Wojtas, K.
    Rybałtowska, A.
    Witkowski, D.
    Makowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/115849.pdf
    Data publikacji:
    2015
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    jet reactor
    mixing
    chemical reaction
    precipitation
    numerical simulation
    reaktor strumieniowy
    mieszanie
    reakcja chemiczna
    osad
    symulacja numeryczna
    Opis:
    The paper presents an application of CFD simulations to predict a course of complex processes carried out in jet reactors. In this work the simulations results were verified with PIV and PLIF techniques and validated by comparing model predictions with experimental data for fast parallel chemical test reactions. Experimental results of BaSO4 precipitation in jet reactors are also discussed.
    Źródło:
    Challenges of Modern Technology; 2015, 6, 4; 31-35
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrodynamika przepływu cieczy w reaktorze strumieniowo-pętlicowym z przegrodą lamelową
    Application of РІV method for the measurement of turbulent velocity fields in a jet mixer
    Autorzy:
    Ludwig, W.
    Szafran, R. G.
    Feder-Kubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073403.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hydrodynamika
    reaktor strumieniowy
    przegroda lamelowa
    hydrodynamics
    jet-loop reactor
    lamellar barrier
    Opis:
    Celem pracy było przetestowanie przydatności zbudowanego w Zakładzie Inżynierii Chemicznej Politechniki Wrocławskiej niskobudżetowego układu pomiarowego PIV do pomiaru burzliwych pól prędkości w laboratoryjnym mieszalniku strumieniowym. Wyznaczone w czasie badań profile prędkości płynu w wypływającej strudze w różnych odległościach od wylotu dyszy, dla różnych natężeń przepływu porównano wartościami obliczonymi z zależności literaturowych. Na tej podstawie określono metodę uśredniania pola prędkości.
    The goal of this work was to test the usability of low-costing PIV measuring system built in the Department of Chemical Engineering of Wroclaw University of Technology and used to measure turbulent liquid veIocity field of in a jet mixer. The profiles of liquid velocity at different distances froim a nozzle outlet were compared with the values calculated from literature equations. On this basis, the optimal method of liquid velocity field avera-ging was determined.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2014, 3; 157--159
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface modifications of biomaterial with different cold plasma reactors to improve cell adhesion
    Autorzy:
    Terebun, Piotr
    Kwiatkowski, Michał
    Zarzeczny, Dawid
    Pawłat, Joanna
    Wójcik, Michał
    Trzaskowska, Marta
    Kazimierczak, Paulina
    Przekora, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/2172008.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    curdlan
    agarose
    gliding arc discharge reactor
    dielectric barrier discharge plasma jet
    dielectric barrier discharge surface reactor
    surface modification
    Opis:
    There is a growing trend in the engineering of biomaterials, focusing on surface modifications of biomaterials to improve their mechanical strength, corrosion resistance, and biological properties. Cold plasma treatment may improve biological properties of biomaterials for biomedical applications by enhancing their integration with host tissue. This study investigated the influence of different cold plasma treatments on the surface properties of a polysaccharides- -based biomaterial to improve cell adhesion to its surface. The samples were subjected to plasma treatment using three different reactors operating at atmospheric pressure: gliding arc discharge (GAD) reactor, dielectric barrier discharge (DBD) plasma jet, and DBD surface reactor. Next, surface chemistry of the biomaterial after plasma treatment was determined by ATR-FTIR analysis. Furthermore, a cell adhesion assay on the samples was carried out using normal human skin fibroblasts (BJ cell line). The attenuated total reflection Fourier transform infrared analysis (ATR- -FTIR) showed that new potential functional groups could be formed on the material surface after plasma treatment. However, plasma treatment of the samples did not enhance cell adhesion to the surface of the polysaccharides-based biomaterial. Thus, the obtained results indicate that plasma treatment using GAD reactor, DBD plasma jet, and DBD surface reactor was not effective for surface modification and cell responses.
    Źródło:
    Engineering of Biomaterials; 2022, 25, 165; 2--6
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A mixed type boundary-value problem related to the electrostatics of cold plasma jet reactors based on dielectric barrier discharge
    Autorzy:
    Vafeas, Panayiotis
    Papadopoulos, Polycarpos K.
    Svarnas, Panagiotis
    Powiązania:
    https://bibliotekanauki.pl/articles/1838214.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    DBD
    dielectric barrier discharge
    cold plasma jet
    reactor
    mixed type boundary value problem
    electrostatic potential theory
    Opis:
    A semi-analytical model is presented for the determination of the electric field in reactors used for cold atmospheric pressure plasma (CAPP) jet production, based on the concept of dielectric barrier discharge (DBD). These systems are associated with various applications in contemporary engineering, ranging from material processing to biomedicine, and at the same time they provide many challenges for fundamental research. Here, we consider a simplified system configuration of a single driven electrode, surrounding a thin dielectric tube, which does not contribute to the electric field, since the potential variation is immediate due to its negligible size. By employing the cylindrical coordinate system that perfectly fits the present plasma jet reactor, we separate the area of electric activity into three distinct domains according to the imposed external conditions, while our analysis is restricted to the electrostatic limit of Maxwell’s equations. To this end, cylindrical harmonic field expansions are used for the potential, which produce the corresponding electric fields in each subdomain. Due to the imposed mixed-type boundary value problem, additional linear terms are incorporated, leading to three possible analytical solutions of the physical problem under consideration. The efficiency of the method is demonstrated by comparing the final formulae with a numerical solution, followed by the relevant discussion.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 233-245
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fusion 2050 : European and Polish Perspective
    Autorzy:
    Romaniuk, R. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226588.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    European research programs
    7FP
    accelerator science and technology
    large research infrastructures
    JET
    ITER
    IFMIF
    DEMO
    nuclear fusion
    thermonuclear power engineering
    DT fusion
    Neutrons
    aneutronic technologies
    inertial fusion
    tokomak
    stellarator
    fusion reactor
    tritium
    electronics for fusion
    Opis:
    Fusion, in all its varieties, is a very current subject of science and technology. The results of strongly exothermic reaction of thermonuclear fusion between nuclei of deuterium and tritium are: helium nuclei and neutrons, plus considerable kinetic energy of neutrons of over 14 MeV. DT nuclides synthesis reaction is probably not the most favorable one for energy production, but is the most advanced technologically. More efficient would be possibly an aneutronic fusion. The EU by its EURATOM agenda prepared a Road Map for research and implementation of Fusion as a commercial method of thermonuclear energy generation in the time horizon of 2050. The milestones on this road are tokomak experiments JET, ITER and DEMO, and neutron experiment IFMIF. There is a hope, that by engagement of the national government, and all research and technical fusion and plasma communities, part of this Road Map may be realized in Poland. The infrastructure build for fusion experiments may be also used for material engineering research, chemistry, biomedical, associated with environment protection, power engineering, security, etc. Construction of such research and industrial accelerator and tokomak infrastructure may have potentially a profound meaning for the development of science and technology in Poland.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 95-101
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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