The formation mechanism of micro-porosity in aluminum alloy castings and the numerical models for predicting micro-porosity have been surveyed. The numerical models were categorized into four types

such as criteria function

Darcy’s law coupled with the conservation and continuity equation

hydrogen-diffusion-controlled pore growth models

microstructure coupled with pore models

based on the studied literatures. The advantages and limitation of each type of the models were described. Finally

the future development of advanced microporosity prediction models was expounded.