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Simulation of SCC Flow.


pdf icon Simulation of SCC Flow. (2318 K)
Martys, N. S.; Ferraris, C. F.

Design and Use of Self-Consolidation Concrete. North American Conference, 1st. November 12-13, 2002, 27-30 pp, 2003.

Keywords:

simulation; concretes; rheology; self-consolidating concrete (SCC); Dissipative Particle Dynamics (DPD)

Abstract:

In principle, self-consolidating concrete (SCC) should allow for the easy movement of concrete around flow obstructions under its own weight without the use of external vibration. The flow of concrete around barriers will depend on a variety of factors, including the concrete or mortar viscosity, the yield stress and the size distribution and shape of the coarse aggregate. Modeling the flow of complex fluids like concrete presents a great research challenge because of the necessity of accounting for the polydisperse motion of the aggregate, while, simultaneously solving the Navier-Stokes equations for the liquid phase in which they are immersed. Numerous schemes (1) have been developed using many standard cdmputational approaches for solving the Navier-Stokes equations with moving rigid bodies. In general though, they are rather complicated and demand very large computational resources. Recently some novel approaches (2), based on cellular automata methods (lattice Boltzmann and dissipative particle dynanucs (DPD)) have shown great promise for modeling a varIety of complex flow problems. DPD has been shown to be particularly well suited for modeling complex systems like suspensions. This paper will give some highlights of the method and some examples of applications to SCC technology.