tailorcrete:examples:slump-flow
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tailorcrete:examples:slump-flow [2012/07/25 16:12] – kolarfil | tailorcrete:examples:slump-flow [2012/09/13 09:48] – Reformatted, languange check bp | ||
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- | ==== Slump flow test ==== | + | ===== Slump flow test ===== |
- | === Test setup and Geometry === | + | ==== Test setup and Geometry |
- | This section presents results of slump flow simulations. It is a typical test usually | + | This test is a typical test used to check consistency of a fresh concrete |
- | {{: | + | {{: |
- | === Computational Model === | + | ==== Computational Model ==== |
- | The problem is modeled in axisymmetric setting due to the rotational symmetry | + | Due to the rotational symmetry, the problem |
+ | *density 2300 kg/m3, | ||
+ | *yield stress 40 Pa, | ||
+ | *viscosity 20 Pa.s. | ||
+ | The simulations were performed with different type of friction conditions assumed on horizontal plate. The full slip as well as | ||
+ | different friction coefficients have been considered. The friction coefficient has been set to 0.0, 0.01, 0.1 and 5.0. A significant difference in flow patterns 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. The simulations were done using | + | The computational |
- | Bingham model (corresponding to self compacting concrete | + | |
- | 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 | + | |
- | {{: | + | {{: |
- | === Results === | ||
- | 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/ | ||
- | {{: | + | The example of OOFEM input file is available here: {{: |
- | {{: | + | ==== Results ==== |
+ | On the next four videos, the influence of boundary condition on the flow is illustrated. The Different values of friction coefficient were assumed (equal to 0, 0.01, 0.1 and 5.). Parameters of the Bingham model for concrete were following: yeld stress 40 [Pa], plastic viscosity 20 [Pa.s], and density 2300 [kg/m3]. | ||
- | {{: | + | |{{video> |
+ | |Friction coefficient 0.0 | Friction coefficient 0.01 | | ||
+ | |{{video> | ||
+ | |Friction coefficient 0.1 | Friction coefficient 5.0 | | ||
- | {{:tailorcrete: | + | On the next figure, the overall influence of friction is illustrated. Final spreading shape of SCC is plotted for different values of friction coefficint. Comparison with analytical solution of simplified problem is made (for further reference, see: [1]) |
- | On the next figure, influence of friction is shown. Final spreading shape of SCC is plotted for different values of friction. Comparison with analytical solution of simplified problem is made (for further reference, see: ROUSSEL N COUSSOT P, “Fifty-cent rheometer” for yield stress | + | {{:tailorcrete: |
+ | |||
+ | ==== References ==== | ||
+ | [1] ROUSSEL N COUSSOT P, “Fifty-cent rheometer” for yield stress | ||
measurements : from slump to spreading flow, Journal of Rheology, 49(3) (2005) | measurements : from slump to spreading flow, Journal of Rheology, 49(3) (2005) | ||
705-718.) | 705-718.) | ||
- | {{: | + | [2] BARTH, T.; SETHIAN, J.A. (2009), Numerical Schemes for the HamiltonJacobi and Level Set Equations on Triangu- |
- | + | lated Domains. Journal of computational physics, 145 1-40. | |
- | Example input file is here: {{: | + | |
- | + | ||
- | Description of input file can be found here: [[tailorcrete: | + | |
+ | [3] TEZDUYAR, T : Stabilized Finite Element Formulations for Incompressible Flow Computations, | ||
+ | Applied Mechanics, Volume 28, 1991, Pages 1-44 | ||
tailorcrete/examples/slump-flow.txt · Last modified: 2012/09/13 09:54 by bp