scholarly journals Parallel partitioning algorithm for numerical simulation of gas-liquid two-phase flow during the mold filling process

2019 ◽  
Vol 37 ◽  
pp. 513-519
Author(s):  
Yongjia Zhang ◽  
Xiang Gao ◽  
Xu Shen ◽  
Zhiwei Huang ◽  
Yajun Yin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Two Phase Flow ◽  
Mold Filling ◽  
Phase Flow ◽  
Filling Process ◽  
Two Phase ◽  
Partitioning Algorithm

Numerical Simulation of Dynamic Process under Low Pressure Casting Based on Two Phase Flow

2015 ◽  
Vol 727-728 ◽  
pp. 358-361
Author(s):  
Shan Guang Liu ◽  
Fu Yang Cao ◽  
Xin Yi Zhao ◽  
Yan Dong Jia ◽  
Zhi Liang Ning ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Particle Image Velocimetry ◽  
Particle Image ◽  
Mold Filling ◽  
Phase Flow ◽  
Pressure Casting ◽  
Filling Process ◽  
Two Phase ◽  
Image Velocimetry ◽  
Low Pressure Casting

It has been proved that the mold filling under low pressure casting can be described by the second order nonlinear differential equations characterized by damping oscillations. To obtain higher accuracy of the velocity field, the mold filling process with damping oscillations should be considered. A computational model taking the liquid level droping in the crucible into account based on two phase flow for filling process of damping oscillations is presented in this paper. Hydraulic simulation with the particle image velocimetry was adopted to verify the numerical simulation result. It is proved that the nemuerical simulation results used the presented model perfecly match with the particle image velocimetry results. Liquid level droping in crucible is the main reason for damping oscillations in mold filling. Velocity oscilations can be eliminated when the melt flow across a sudden expansion section. The detailed flow field based on the presented model can provide guidance to optimize the process parameters.

Simulation of Gas-Solid Two-Phase Flow to Process of Filling the Foam Mould

2008 ◽  
Vol 575-578 ◽  
pp. 49-54 ◽  
Author(s):  
Jun Xia Jiang ◽  
Zhi Chao Wu ◽  
Li Liang Chen
Keyword(s):  
Numerical Simulation ◽  
Two Phase Flow ◽  
Influential Factors ◽  
Phase Flow ◽  
Actual Process ◽  
Shooting Methods ◽  
Filling Process ◽  
Two Phase ◽  
Foam Pattern

In lost foam casting (LFC), the foam pattern is the key qualification, and the filling process is one of the crucial processes to ensure the high quality of the foam pattern. Filling without uniformity and denseness will cause various defects and affect the quality of the surface. The influential factors of filling process are analyzed .And optimizing filling process, enhancing efficiency, decreasing waster are obtained by the numerical simulation of filling process using computer. The governing equations of the dense compressible gas-solid two-phase flow are established, and the physical signification of each one in the equations is discussed. The filling process is solved by Euler- Euler model. In the simulation, the volume of foam bead in every governing unit at different time is calculated, and the trend of foam bead flow is obtained. The filling process of various different conditions is simulated, considering different shooting methods and the position of baffles, and recorded by digital vidicon. The characteristics and the rules of the process are summarized. By contrasting the result of the numerical simulation with the one of examination, it is found that the fluid trend of foam bead in the numerical simulation is accordant to the actual process. So the numerical simulation of filling process by applying this model is an effective method.

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