Étude numérique du remplissage 3D en fonderie

Abstract : This work deals with the numerical simulation of unsteady free surface flows of incompressible viscous fluids with finite element method. The industrial application consists of the filling stage of casting processes. It is based on the adaptation of an already existing software, REM3D®, which was initially dedicated to polymers injection moulding. Gravity and inertial effects have been introduced in the solver yielding a direct Navier Stokes method. Inertia description uses a piecewise linear interpolation of the velocity, and also the mean value of the velocity which is piecewise constant: the Galerkin discontinuous method is used to treat the advection terms. This Navier Stokes equations resolution has been tested on several academic test cases: steady and non steady flow benchmarks have been chosen in order to validate only the mechanical solver, and afterwards, its coupling with the free surface solver. In order to simulate fluid metal flow, sliding boundary conditions have been introduced. An original algorithm of multiple consistent normal vectors has been implemented and validated. Finally, the filling stage of a specific casting benchmark has been studied, and mould filling have been carried out on industrial cases.
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  • HAL Id : tel-00274191, version 1

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Estelle Saez. Étude numérique du remplissage 3D en fonderie. Mécanique [physics.med-ph]. École Nationale Supérieure des Mines de Paris, 2003. Français. ⟨NNT : 2003ENMP1145⟩. ⟨tel-00274191⟩

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