New strategy of solid/fluid coupling during numerical simulation of thermo-mechanical processes |
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| Affiliation: | 1. University Lille1, Laboratoire d’Electrotechnique et d’Electronique de Puissance, France;2. University Lille1, Villeneuve d’Ascq Cedex, France;3. Department of Electrical & Computer Engineering of the University of Toronto, Toronto, Canada;4. École Nationale des Arts & Métier Paris-Tech, Lille, France;1. ESI-France, Le Récamier, 70 Rue Robert, 69006, Lyon, France;2. Université de Lyon, ENISE, CNRS, UMR 5513, LTDS, 58 Rue Jean Parot, 42023, Saint-Etienne Cedex 02, France;3. Sorbonne Université, Faculté des Sciences et Ingénierie, Campus Pierre et Marie Curie, CNRS, UMR 7190, Institut Jean Le Rond d’Alembert, 75252, Paris Cedex 05, France;4. Grenoble INP, CNRS, UMR 5266, SIMaP, 1130 Rue de la Piscine, Domaine Universitaire, 38402, Saint Martin d’Heres Cedex, France;1. Research Center of Fluid Machinery Engineering & Technology, Jiangsu University, Zhenjiang, 212013, China;2. School of Mechanical Engineering, Nantong University, Nantong, 226019, China;1. MOE Key Laboratory for Liquid-Solid Structure Evolution and Materials Processing, and Institute of Materials Joining, Shandong University, Jinan, 250061, China;2. Harbin University of Science and Technology Rongcheng Campus, Rongcheng, 264300, China |
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| Abstract: | In this study, numerical methods are developed to simulate thermomechanical processes, taking into account both the fluid flows in the molten pool and the deformations of the solid parts. The methods are based on a new strategy of solid/fluid coupling. They allow to simulate the formation of the molten pool by taking into account the fluid flows through both effects of the surface tension (“curvature effect” and “Marangoni effect”) and the buoyancy. An ALE approach is used to follow the evolution of the free surface. The effects of the deformations in the base metal on the fluid flows in the molten pool (solid/fluid interaction) is ensured by imposing the velocities of the solid nodes during the thermo-fluid simulation. As an application, a thermo-fluid-mechanical simulation of laser welding is carried out. It is found that the solid/fluid interaction has a minor effect on simulation results. |
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| Keywords: | Solid/fluid interaction Fluid flows Solid deformations Thermo-mechanical processes Numerical simulation |
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