The low pressure casting process for thin-walled Al alloy shell as a crucial structural component was designed

and the filling flow pattern

temperature field and shrinkage porosities（holes）in thin-walled aluminum alloy shell were simulated to optimize the low pressure casting process.The simulated results show that with copper core instead of steel core

the stable filling flow and uniform temperature distribution can be visualized

and the shrinkage porosities（holes）are visualized to be distributed out the shell.The optimized casting process can optimize effectively temperature field and reduce the possibility of shrinkage holes（porosities）

obtaining the qualified shell with high quality.