Abstract. Polymer injection in moulds with complicated shapes is common in todays industrial problems. A challenge is to optimize the mould design which leads to the most homogeneous filling. Current commercial softwares are able to simulate the process only partially. This paper proposes a preliminary study of the capability of a two-fluid LatticeBoltzmann model to provide a simple and flexible approach which can be easily parallelized, will include correct contact angles and simulate the effect of the positioning of air-holes.