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* Slump flow test
This section presents results of slump flow simulations. The problem is solved in axisymmetric setting due to the rotational symmetry of the problem. As a geometry, Abrams cone was choosen (see the picture below). The simulations were done using Bingham model (corresponding to self compacting concrete with very low yield stress) with the following parameters: density 2300 kg/m3, yield stress 40 Pa, viscosity 20 Pa.s. The simulations were performed for different type of friction conditions assumed on horizontal plate. The full slip as well as different friction coefficients has been considered. The friction coefficient is sequentially equal to 0.0, 0.01, 0.1 and 5.0. Significant difference in flows for different friction coefficient can be observed.
The mesh is shown on the next picture. It is refined near the botom surface to improve accuracy of the interface capturing.
On the next four videos, the influence of boundary condition on the flow is shown. The friction coefficient is sequentially equal to 0, 0.01, 0.1 and 5. Parameters of the concrete are always yield stress 40 Pa and plastic viscosity 20 Pa.s. Density is 2300kg/m3.
Example input file is here: slump_beta0.01_tau40.0_mu20.0_oofem.in
Description of input file can be found here: Input File Description