Prediction of Gas Hole by Mold-Filling Simulation with Consideration of Surface Tension
Prediction of Gas Hole by Mold-Filling Simulation with Consideration of Surface Tension
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DOI：
10.1299/jsmeb.47.699
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
T. Sakuragi
中科院分区：
文献类型：
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作者：
T. Sakuragi
在CIP法的基础上，发展了考虑表面张力的充模模拟算法。作为一个测试问题，挤压铸造模拟。作为一个实际的铸造问题的应用，我们也将此方案的压铸模拟和比较数值结果与实验数据的大小和位置的气孔。有无表面张力条件下的数值结果均表明了气泡的存在。然而，没有表面张力的模拟往往低估了气孔的大小。通过这些数值结果，证实了考虑表面张力对预测型腔中气体的大小和位置是非常重要的。此外，我们提出一个判断在充型过程中，型腔中残留的气体是压缩还是膨胀的准则，并将其应用于实际的压铸问题
The algorithm for mold-filling simulation with consideration of surface tension has been developed based on the CIP method. As a test problem, a squeeze casting simulation was taken up. As an application to a practical casting problem, we also applied this scheme to a die-casting simulation and compared the numerical results with the experimental data on the size and the position of blow holes. Numerical results both with and without surface tension indicated the existence of blow holes. However, the simulation without surface tension tended to underestimate the size of blow holes. Through these numerical results, it is confirmed that the consideration of surface tension is very important for predicting the size and the position of gas trapped in mold cavities. Furthermore, we propose a criterion for estimating whether the gas remaining in the cavity is compressed or expanded during mold filling, and adopt it to a practical die-casting problem