LAUSR

Abstract This paper aims to clarify applicability of two variants of SPH and MPS methods, namely, a weakly compressible SPH (WCSPH) and a completely implicit MPS (I-MPS) to the flow simulation of freshly mixed cementitious materials (FCM). By comparing the numerical and experimental results of L-flow of fresh mortars, it is found that the I-MPS method has higher calculation efficiency and accuracy. The applicability of the WCSPH method to the gravity-induced flow simulation of FCM is dependent on its fluidity and initial height, whereas the I-MPS method has wide application range if the boundary slippage resistance is appropriately considered. In case of fresh mortar, the I-MPS simulations, using Bingham model and VGM (Viscous Granular Material) model, has almost the same accuracy when the mortar is subjected to a high pressure, whereas the VGM model has high accuracy in case of low pressure. When a large gravity-induced pressure or a large external force acts on FCM, the WCSPH calculates greatly fluctuating inter-particle pressures, while the I-MPS method yields very stable and precise inter-particle pressures.