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

Authors :
F.Y. Cao
Xin Yi Zhao
Jian Fei Sun
Yan Dong Jia
Zhiliang Ning
Shan Guang Liu
Source :
Applied Mechanics and Materials. :358-361
Publication Year :
2015
Publisher :
Trans Tech Publications, Ltd., 2015.

Abstract

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.

Details

ISSN :
16627482
Database :
OpenAIRE
Journal :
Applied Mechanics and Materials
Accession number :
edsair.doi...........d5cc208805793d005d8376e57fb1db2e
Full Text :
https://doi.org/10.4028/www.scientific.net/amm.727-728.358