Three-dimensional mesoscopic modeling of equiaxed dendritic solidification in a thin sample: effect of convection flow

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Olmedilla, A.^1 ; Zalonik, M.^1 ; Cisternas Fernández, M.^1 ; Viardin, A.^2 ; Combeau, H.^1

Université de Lorraine, CNRS, IJL, Nancy

F-54000, France^1

Access E.V., Intzestr. 5, Aachen

D-52072, Germany^2

关键词: Convection flow;    Dendritic solidification;    Grain positions;    Isothermal solidification;    Mesoscopic modeling;    Natural convection flow;    Sample thickness;    X-ray observations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012040/pdf
DOI  :  10.1088/1757-899X/529/1/012040

来源: IOP

【 摘 要 】

A 3D mesoscopic envelope model is used to numerically simulate the experimental X-ray observations of the equiaxed dendritic isothermal solidification of a thin sample of Al-20 wt%Cu alloy including the natural convection flow. Several four-grain simulations are run to investigate the effect of the convection, of the grain position, and of the grain rotation on the tip growth kinetics of one of the grains. We show that the effect of convection flow - consequence of the presence of gravity parallel to the sample thickness direction, z - on the growth kinetics of the reference grain depends significantly on the position of the grain along the sample thickness.