Predicting the yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness

This paper develops an empirical model to predict the static yield stress of 3D printing mortar based on the flowability of paste and excess paste thickness. The components of the mortar are divided into paste and aggregate. The relation between the yield stress of mortar and the yield stress of paste and the excess paste thickness is...

Quasi-steady quasi-homogeneous (QSQH) description of the relationship between large-scale and small-scale motions in near-wall turbulence

The validity of the recently proposed hypothesis that the influence of large-scale motions on the near-wall turbulence is quasisteady is investigated by quantitative comparisons with the data obtained by direct numerical simulations of a turbulent channel flow. Large-scale motions are filtered by a Fourier cut-off filter multi-objectively...

Time Resolved Tomographic PIV Measurements of Rough-Wall Turbulent Channel Flow

Rough-wall turbulent channel flow is investigated via time-resolved tomographic particle image velocimetry (TPIV). To facilitate 3D measurements in the bulk flow as well as very close to the rough surface the optical refractive index of the transparent acrylic channel wall is matched with that of the liquid, a concentrated solution of sodium...