A new program is developed for gas-liquid two-phase mold filling simulation in casting. The gas fluid, the superheated liquid metal and the liquid metal containing solid grains are assumed to be governed by Navier-Stokes equations and solved through Projection method. The Level set method is used to track the gas-liquid interface boundary. In order to demonstrate the correctness of this new program for simulation of gas-liquid two-phase mold filling in casting, a benchmark filling experiment is simulated (this benchmark test is designed by XU and the filling process is recorded by a 16-mm film camera). The simulated results agree very well with the experimental results, showing that this new program can be used to properly predicate the gas-liquid two-phase mold filling simulation in casting.%针对在铸件充型过程中，金属液表现出不同的流动特点，含有固体颗粒的金属液具有不可压缩非牛顿流的流动特性，而过热金属液具有不可压缩牛顿流的流动特点，采用 Projection 方法求解气体、过热金属液和含有固体颗粒的金属液的速度场，用Level set方法来追踪气-液界面边界。为了验证计算模型，将模拟结果与实验结果(采用16 mm摄像机记录充型过程)进行比对，从而证明计算模型的正确性。
展开▼
