Most commercial softwares simulating casting process use a scalar field to quantify the shrinkage on final parts. The repartition of this scalar is used to localize shrinkage in the part. In this work, the objective is to use a new approach to predict morphological information about size and shape of shrinkage: the phase field method. This method is based on a parameter order defining the alternating zones metal/gas. Starting with a uniform unit value of this scalar, the phase field equation is modified with a nucleation process predicting the growth of the air phase into the metal one still liquid. The coupling with the Navier-Stokes equation brings up some interesting non-dimensional parameters that affect shrinkage morphology. This is what we have tried to analyse after proposing the modified phase fields formalism. Even if we are not yet in the predictive stage, we present in the end of this paper a numerical/experimental comparison showing the potentiality of the developed approach.

大多数模拟铸造过程的商业软件都使用标量场来量化最终零件的收缩率。此标量的重新划分用于定位零件中的收缩。在这项工作中，目标是使用一种新方法来预测有关收缩的大小和形状的形态信息：相场法。该方法基于定义金属/气体交替区域的参数顺序。从此标量的统一单位值开始，通过成核过程对相场方程进行修改，该成核过程可预测空气向一种静止液态金属中的增长。与Navier-Stokes方程的耦合提出了一些有趣的无量纲参数，这些参数会影响收缩形态。这是我们在提出修改后的相场形式主义之后试图进行的分析。