Keywords Short fiber suspensions fiber orientation parallel computing microstructure generation fiber interaction numerical scale transition
Introduction The microstructure of a short fiber thermoplastic composite greatly affects its mechanical properties. We wish to simulate the flow behavior of concentrated fiber suspensions containing a significant number of fibers in order to understand the evolution of fiber orientation during the forming process. We aim to ensure a scale transition in numerical rheometry by simulating a whole injected part or a thickness of a part with a complex geometry. This paper focuses first on a numerical method to generate an initial isotropic state of concentrated fiber suspensions. Then, kinematic of fiber suspensions under Newtonian shear flow is studied through a direct numerical simulation (DNS) taking into account the different existing interaction forces [1]