CAJ | 학술논문

采用基于同位网格的有限体积方法耦合Level Set方法，求解了黏弹性流体具有相变的气-液两相充填模型；模拟出了黏弹性流体在带有嵌件的型腔充模过程中熔接线区域以及壁面凝固层的形成过程；得到了充填过程中熔接线区域的界面运动情况，得到了充模结束时型腔内压力、应力等物理量的分布，得到了与实验结果一致的应力集中以及应力双折射现象；并讨论了注射速度、熔体温度对熔接线区域厚度的影响。研究发现：注射速度越高，熔接线区域越薄；熔体温度越高，熔接线区域越薄，所以提高注射速度、熔体温度可以使熔接线区域变薄或消失。
채용기우동위망격적유한체적방법우합Level Set방법，구해료점탄성류체구유상변적기-액량상충전모형；모의출료점탄성류체재대유감건적형강충모과정중용접선구역이급벽면응고층적형성과정；득도료충전과정중용접선구역적계면운동정황，득도료충모결속시형강내압력、응력등물리량적분포，득도료여실험결과일치적응력집중이급응력쌍절사현상；병토론료주사속도、용체온도대용접선구역후도적영향。연구발현：주사속도월고，용접선구역월박；용체온도월고，용접선구역월박，소이제고주사속도、용체온도가이사용접선구역변박혹소실。
The gas-liquid two-phase model for the simulation of viscoelastic fluid mould-filling process with the con-sideration of phase change is solved by finite volume method with non-staggered grid. The level set method is used to capture the interface evolution in the mould-filling process. The weld line zone and the frozen layer forming processes are simulated numerically. The interface involution,especially that of the weld line zone,is given in de-tail. The distributions of physical quantities such as frozen layer,pressure and stress distribution are given. Stress concentration and stress birefringence phenomena are captured and analyzed in detail,which are in well agreement with experimental results. The weld line zone under different temperatures and injection velocity are discussed. Nu-merical results show that increasing the temperature of melt and injection velocity is a better way to get weld line zone to be thinner or disappearing.