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      Modelling and simulation of the influence of flow boiling during quenching in liquids* Translated title: Modellierung und Simulation des Siedeeinflusses beim Abschrecken in Flüssigkeiten

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          Kurzfassung

          Das mehrphasige Strömungsfeld und der Wärmeübergang an der Oberfläche eines Zylinders sowie dessen Abkühlung während des Abschreckprozesses in flüssigen Medien werden mit einem siedephasenübergreifenden Ansatz modelliert. Hiermit wird die Simulation und Berechnung des gesamten Abkühlverlaufs eines Bauteils bei der Abschreckung innerhalb eines einzigen Modells dargestellt. Simulationsergebnisse zum zeitabhängigen Abkühlverhalten eines zylindrischen Bauteils werden für verschiedene Anströmungsbedingungen und Fluidunterkühlungen verglichen. Insbesondere wird dabei auf die lokalen Dampfgehalte in Oberflächennähe des Bauteils und deren Einfluss auf den zeitabhängigen Wärmeübergang eingegangen.

          Abstract

          A combined multiphase flow and heat transfer model is utilized to simulate the flow and heat transfer processes of metallic specimen during the quenching process in a liquid. The applied bubble crowd model is able to investigate the different boiling phases (film, transition, nucleate) within one single numerical model approach. Simulation results of the transient cooling of a single cylindrical specimen in the quenching process are discussed for various flow velocities and liquid subcoolings. Characteristics of the vapour formation process during quenching and its impact on the surface heat transfer coefficient during heat treatment are discussed.

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          Most cited references 12

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          Experimental studies of boiling mechanisms in all boiling regimes under steady-state and transient conditions

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            CFD application to prediction of void distribution in two-phase bubbly flows in rod bundles

             H. Anglart,  O. Nylund (1996)
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              Modelling of local two-phase flow parameters in upward subcooled flow boiling at low pressure

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                Author and article information

                Journal
                htme
                HTM Journal of Heat Treatment and Materials
                Carl Hanser Verlag
                1867-2493
                2194-1831
                2011
                : 66
                : 5
                : 275-280
                Affiliations
                1 Prof. Dr.-Ing. Udo Fritsching, Foundation Institute for Materials Science, IWT Bremen
                Author notes
                [§ ] Correspondence address, Dipl.-Wirt.-Ing. Paul Stark, Foundation Institute for Materials Science, IWT Bremen, pstark@ 123456iwt.uni-bremen.de
                [*]

                revised lecture hold by Paul Stark at the IDE 2011, 3rd International Conference on Distortion Engineering, Bremen, Germany, September 14–16, 2011. In Proc. IDE 2011, H.-W. Zoch, Th. Lübben (Eds.) the original lecture version is published.

                Article
                HT110116
                10.3139/105.110116
                © 2011, Carl Hanser Verlag, München
                Page count
                References: 14, Pages: 6
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/htme
                Categories
                Fachbeiträge/Technical Contributions

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