Prediction of the solidification mechanism of ZA alloys using Ansys Fluent

Asaad Kadhim Eqal ； Jawdat Ali Yagoob

《淡江理工學刊》 24卷5期 (2021/10) Pp. 699-706

https://doi.org/10.6180/jase.202110_24(5).0002

摘要

It is a transient non-linear phenomenon that poses a challenge in terms of modeling and analysis. This article was focused on the numerical modeling of the solidification of ZA alloy castings using ANSYS Fluent simulation software. For parametric analysis of the solidification process in casting, the numerical simulation was performed based on boundary conditions and grid-independent. The solidification approach is studied by observing the effect of changes in parameters concerning the distribution of temperature, fluid flow, solidification time, and mass fraction in different instances of solidification of ZA alloys on the solidification in relation with the time. The simulation results explained that the period between freezing start to freezing end temperature was increased from 30 to 40 and 54 by increasing aluminum content from 8 to 12 and 27 wt% respectively. Also, it was concluded that the solid-liquid interface advancement was in a linear manner, furthermore, the configuration of the cooling curve at two-phase co-existence portion was linear at 27 weight% aluminum content in the alloy while it became decline in shape when the aluminum percentage becomes lower. Finally, the solidification of the alloys generally took place in two stages. Solidification with slow rate at the initial stage, then with the more rapid rate at the second stage Metals and alloys solidification continues to be phenomena of great concern to physicists, metallurgists, casting engineers, and device developers.

關鍵字

ZA alloy ； modeling ； mechanical properties ； Ansys Fluent Approach ； numerical simulation ； parametric analysis