Numerical modelling of concrete flow with rigid fibers

The aim of this paper is to propose a multi‐domain approach to model the flow motion of concrete flow. We mainly deal with free surfaces, material interfaces and fiber orientation. The main application behind this paper is related with the addition of rigid long metal pieces to fresh concrete in order to improve the final mechanical properties of concrete beams. Bingham’s rheology is used for fresh concrete behavior, whereas the fiber orientation is described by Folgar and Tucker equation. The velocity field is computed using a classical finite element method whereas the evolution of orientation tensors is solved by a space‐time discontinuous Galerkin method. Furthermore, a specific method has been developed in order to compute accurately the moving free surface.