本文将CICSAM(Compressive Interface Capturing Scheme for Arbitrary Meshes)格式与实验室自主研发的GTEA(Gen⁃eral Transport Equation Analyzer)求解器相结合用于求解两相自由面流动问题。Ubbink(1997)提出的CICSAM格式作为一种高精...本文将CICSAM(Compressive Interface Capturing Scheme for Arbitrary Meshes)格式与实验室自主研发的GTEA(Gen⁃eral Transport Equation Analyzer)求解器相结合用于求解两相自由面流动问题。Ubbink(1997)提出的CICSAM格式作为一种高精度VOF类方法,基于有限体积法思想对瞬态标量对流方程进行离散,是一种完全守恒格式。求解体积分数输运方程得到的更新的物质参数,如密度和粘度,被用于N-S方程求解中,以获得当前时刻的速度和压力场,从而实现了两者的耦合。通过典型算例的测试,并与相应的理论解或实验值对比,验证当前方法对模拟两相自由面流动问题具有可行性。展开更多
A new method for sloshing simulation in a sway tank is present, in which the two phase interface is treated as a physical discontinuity, which can be captured by a well-designed high order scheme. Based on Normalized ...A new method for sloshing simulation in a sway tank is present, in which the two phase interface is treated as a physical discontinuity, which can be captured by a well-designed high order scheme. Based on Normalized Variable Diagram （NVD）, a high order discretization scheme with unstructured grids is realized, together with a numerical method for free surface flow with a fixed grid. This method is implemented in an in-house code General Transport Equation Analyzer （ GTEA ） which is an unstructured grids finite volume solver. The present method is first validated by available analytical solutions. A simulation for a 2-D rectangular tank at different excitation frequencies of the sway is carried out. A comparison with experimental data in literature and results obtained by commercial software CFX shows that the sloshing load on the monitor points agrees well with the experimental data, with the same grids, and the present method gives better results on the secondary peak. It is shown that the present method can simulate the free surface overturning and breakup phenomena.展开更多
文摘本文将CICSAM(Compressive Interface Capturing Scheme for Arbitrary Meshes)格式与实验室自主研发的GTEA(Gen⁃eral Transport Equation Analyzer)求解器相结合用于求解两相自由面流动问题。Ubbink(1997)提出的CICSAM格式作为一种高精度VOF类方法,基于有限体积法思想对瞬态标量对流方程进行离散,是一种完全守恒格式。求解体积分数输运方程得到的更新的物质参数,如密度和粘度,被用于N-S方程求解中,以获得当前时刻的速度和压力场,从而实现了两者的耦合。通过典型算例的测试,并与相应的理论解或实验值对比,验证当前方法对模拟两相自由面流动问题具有可行性。
基金Project supported by the China Postdoctoral Science Foundation (Grant No. 20100471016)the Fundamental Research Funds for Major Universities (Grant No. HEUCF 100307)
文摘A new method for sloshing simulation in a sway tank is present, in which the two phase interface is treated as a physical discontinuity, which can be captured by a well-designed high order scheme. Based on Normalized Variable Diagram （NVD）, a high order discretization scheme with unstructured grids is realized, together with a numerical method for free surface flow with a fixed grid. This method is implemented in an in-house code General Transport Equation Analyzer （ GTEA ） which is an unstructured grids finite volume solver. The present method is first validated by available analytical solutions. A simulation for a 2-D rectangular tank at different excitation frequencies of the sway is carried out. A comparison with experimental data in literature and results obtained by commercial software CFX shows that the sloshing load on the monitor points agrees well with the experimental data, with the same grids, and the present method gives better results on the secondary peak. It is shown that the present method can simulate the free surface overturning and breakup phenomena.
