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• W1970036500 abstract "Centrifugal casting offers one potential route through to high quality products in difficult to cast high temperature low superheat alloys. The coupling of free surface flows and complex rotating geometries, results in significant centrifugal forces; combined with rapid heat transfer and solidification this yields a significant computational modelling challenge. The ultimate objective of the work reported here is to develop a comprehensive computational model of centrifugal casting that can reliably predict the macro-defects that arise from the process. This contribution describes the development of the computational model, enabling capture of the free surface detail of the flow during the filling stage of centrifugal casting in what are inevitably complex three dimensional geometries. The work reported here concentrates on resolving the fluid film formation, air entrainment within the turbulent gas-fluid interface and transport of gas bubbles through the mould. Validation of the above phenomena is a key issue and a series of water model experiments has been performed and recorded using high-speed video image capture. The objective is to validate and refine the computational model predictions using repeatable high quality experimental data, before application of the model in analysing full-scale centrifugal casting process. A number of key observations arise from this work, such as accurate prediction of the initial pour dynamics, maintaining a sharp fluid–air interface on complex meshes in order to capture the fluid film and air bubble behaviour, and employing higher order schemes to capture the vortex formation. These phenomena are not trivial to capture within the computational modelling tools, however, for the models to be useful in the analysing the full scale casting process, such physics must be reflected within their predictive capability." @default.
• W1970036500 created "2016-06-24" @default.
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• W1970036500 date "2013-08-01" @default.
• W1970036500 modified "2023-09-27" @default.
• W1970036500 title "Complex free surface flows in centrifugal casting: Computational modelling and validation experiments" @default.
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• W1970036500 doi "https://doi.org/10.1016/j.compfluid.2013.04.021" @default.
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