Numerical simulations of concrete flow: A benchmark comparison

•We define two benchmark flows for comparison of numerical simulations for concrete flow.•We describe the three most used numerical methods for concrete flow simulations.•We compare the predictions of these methods when used by various research teams.•We conclude on the technological readiness level of these numerical tools.

First, we define in this paper two benchmark flows readily usable by anyone calibrating a numerical tool for concrete flow prediction. Such benchmark flows shall allow anyone to check the validity of their computational tools no matter the numerical methods and parameters they choose. Second, we compare numerical predictions of the concrete sample final shape for these two benchmark flows obtained by various research teams around the world using various numerical techniques. Our results show that all numerical techniques compared here give very similar results suggesting that numerical simulations of concrete filling ability when neglecting any potential components segregation have reached a technology readiness level bringing them closer to industrial practice.