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Numerical simulation of fresh concrete flow in the L-box test using computational fluid dynamics.
- Source :
- Magazine of Concrete Research; Dec2023, Vol. 75 Issue 23, p1189-1201, 13p
- Publication Year :
- 2023
-
Abstract
- Concrete remains a widely used material in construction. As structures become more optimised, a deeper understanding of the rheology of the concrete mixture is necessary. This paper aims to numerically simulate the flow of fresh concrete in the L-box apparatus, with the objective of gaining insights into its rheological behaviour and predicting its properties. The fresh concrete flowing through the L-box test is simulated from the moment that the gate is lifted until the stoppage and the material takes its final shape. The flow in this tool occurs on a free surface. In this work, a three-dimensional model has been developed using the computational fluid dynamics technique for simulation. The flow behaviour of fresh concrete was assumed to be non-Newtonian following the Bingham law, characterised by a non-linear shear stress–shear rate ratio, yield stress and plastic viscosity. A set of numerical simulations by varying workability were conducted. Furthermore, a parametric study was conducted to examine the impact of introduced parameters in the concrete flow, including the effect of yield stress, viscosity and density. [ABSTRACT FROM AUTHOR]
- Subjects :
- COMPUTATIONAL fluid dynamics
COMPUTER simulation
YIELD stress
CONCRETE
FREE surfaces
Subjects
Details
- Language :
- English
- ISSN :
- 00249831
- Volume :
- 75
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Magazine of Concrete Research
- Publication Type :
- Academic Journal
- Accession number :
- 173452810
- Full Text :
- https://doi.org/10.1680/jmacr.23.00032