|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||A Comparison of the Volume-averaged and Continuum Mixture Approaches for Modeling Equiaxed Solidification
||John Coleman, Matthew John M. Krane
|On-Site Speaker (Planned)
Two frequent approaches to numerically modeling equiaxed solidification consider the effect of grain motion and packing on the fluid flow and macrosegregation. The first is the volume-averaged multiphase formulation, in which separate conservation equations are written for each phase. The second method is the continuum mixture formulation in which conservation equations are written in terms of mixture variables. The former approach resolves microscale transport in greater detail, while the latter approach simplifies microscale transport using ad hoc relationships to improve computational efficiency. While several issues related to the mechanics of grain motion and packing are yet to be fully understood, a formal comparison of the two modeling approaches is needed to justify the use of one approach over the other. Both methods are implemented on the OpenFOAM CFD platform to evaluate their performance and ability to predict settling and transport of equiaxed solid during solidification.
||Planned: None Selected