Simulation and experimental validation of mould filling
- WTCM Foundry Centre, Zwijnaarde (Belgium)
Only a few experiments with liquid metals, either to visually examine the flow behavior or to validate mould filling simulation codes, have been published. Some major results obtained previously the present authors are discussed: the reproducibility of mould filling experiments, the influence of the surface tension and the estimation of the friction from the walls. These results are based on examining the flow of liquid metals behind a transparent heat resistant window and by comparing them with simulation results of a code developed at WTCM. Special attention is paid to the behavior of metal flow in curved gating systems. To this extent, mould filling experiments using a curved, a straight and a stair like gating system have been carried out. The confrontation of these experimental results with those produced by several simulation schemes, demonstrates the major drawbacks of the finite difference method. The finite difference method cannot correctly enmesh a curved gating system since it is limited to a poor zigzag approximation of the interface between different materials. This results in many 90 degree direction changes which create a substantial, artificial energy loss absent in reality. Several options to decrease these limitations have been examined. Of the four methods examined here, only a method based on curvilinear coordinates which employs a structured non-orthogonal mesh, is able to produce results which are in agreement with the experimental data.
- OSTI ID:
- 227725
- Report Number(s):
- CONF-9509118-; ISBN 0-87339-297-3; TRN: IM9622%%2
- Resource Relation:
- Conference: 7. Conference on modeling of casting, welding and advanced solidification processes, London (United Kingdom), 10-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Modeling of casting, welding and advanced solidification processes, 7; Cross, M. [ed.] [Univ. of Greenwich, London (United Kingdom). Centre for Numerical Modeling and Process Analysis]; Campbell, J. [ed.] [Univ. of Birmingham (United Kingdom). School of Metallurgy and Materials]; PB: 1030 p.
- Country of Publication:
- United States
- Language:
- English
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