|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Solidification Fundamentals
||On the Transition from Equiaxed Sedimentation to Viscoplastic Packed Bed Dynamics
||Andreas Ludwig, Menghuai Wu, Christian M.G. Rodrigues, Tobias Holzmann, Alexander Vakhrushev
|On-Site Speaker (Planned)
During equiaxed solidification, crystals sediment and form a so called packed bed. The transition from the sedimenting crystals to the packed ones is referred to as coherency point, the stage were individual crystals first impinge their neighbors. The behavior of separated moving crystals can be described by a submerged object approach, whereas the viscoplastic behavior of a semi-solid slurry follows a volume-averaged viscoplastic constitutive equation. The present contribution specially focuses on the transition between the two regimes and discusses the implication that comes from the fact that both approaches decrease in accuracy close to the corresponding border. It is shown that the presumed coherency point can be varied in a certain range without violating either of the two approaches.
||Planned: Supplemental Proceedings volume