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Computational thermo-fluid dynamics of aluminothermic welding process : numerical modelling of the pouring and solidification stages / Ravi Govindram Kewalramani

By: Resource type: Ressourcentyp: Buch (Online)Book (Online)Language: English Publisher: Wiesbaden : Springer Vieweg, [2025]Copyright date: © 2025Description: 1 Online-Ressource (XXVIII, 153 Seiten) : IllustrationenISBN:
  • 9783658475352
Subject(s): Genre/Form: Additional physical formats: 9783658475345 | 9783658475369 | Erscheint auch als: Computational thermo-fluid dynamics of aluminothermic welding process. Druck-Ausgabe Wiesbaden : Springer Vieweg, 2025. xxviii, 153 SeitenDDC classification:
  • 620 23
RVK: RVK: ZM 8430DOI: DOI: 10.1007/978-3-658-47535-2Online resources: Dissertation note: Dissertation - TU Bergakademie Freiberg, 2024 Summary: The aluminothermic (AT) welding process, also known as Thermit welding, is an essential process for joining and repairing rails due to its simplicity, robustness, portability and economic usage. This book presents a multi-fluid, multiphase numerical model to predict the thermal flow field within the mould during the pouring and solidification stages of the AT welding process, developed using the finite volume method-based open-source CFD software OpenFOAM. The numerical model is rigorously validated not only against well-documented cases in the literature but also through an in-house, low-cost experiment designed to investigate the temporal and spatial evolution of the solid-liquid interface front during the melting of paraffin wax in a rectangular enclosure in the presence of a gas phase. The simulation results show good agreement with the validation cases. Moreover, insights into the thermal pouring stage with solid-liquid phase change phenomena are provided. For this purpose, the available k − ε turbulence model is also extended to incorporate the solid-liquid phase change phenomena. Finally, the temporal and spatial evolution of the solid-liquid interface front during the solidification stage is examined, and the influence of initial molten metal temperature and thermophysical properties on the final weld profiles is systematically studied. About the author Ravi G. Kewalramani is a research associate in the research group “Numerical Thermofluid Dynamics” at the Professorship of Technical Thermodynamics, TU Bergakademie Freiberg.PPN: PPN: 1924767759Package identifier: Produktsigel: ZDB-2-SEB | ZDB-2-STI
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