|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Solidification Science and Engineering
||A Lattice Boltzmann Model with Multiple Grids and Time Steps for Dendritic Solidification
||Elaheh Dorari, Mohsen Eshraghi, Sergio D. Felicelli
|On-Site Speaker (Planned)
The microstructure that forms during material processing such as casting and welding determines the macroscopic mechanical properties. Hence, the study of dendritic solidification contributes to achieving materials with desired microstructure and properties. Numerical methods provide a less expensive and faster approach for understanding dendritic solidification compared to experiments, among which the lattice Boltzmann (LB) method has proven to be simple and time-efficient. In case of metallic alloys, the disparity of diffusive properties of momentum, mass and heat leads to instability of the conventional single-relaxation-time LB method. In order to provide a stable and computationally efficient approach, multiple-time-step and multiple-grid LB techniques are developed to model the transport phenomena during solidification. In this work, we illustrate the stability and computational efficiency of these LB techniques when applied to dendritic solidification under melt convection and different cooling conditions.
||Planned: Supplemental Proceedings volume