tailorcrete:examples:v-funnel
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tailorcrete:examples:v-funnel [2012/07/24 14:48] – kolarfil | tailorcrete:examples:v-funnel [2012/09/13 09:14] (current) – bp | ||
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- | ==== V-funnel simulation ==== | + | ===== V-funnel simulation |
+ | ==== Test setup and Geometry | ||
- | * **Test | + | V-funnel problem simulates the emtying of SCC from V-shaped reservoir due to gravity force. The thickness of the specimen is rather small and the effect of the thickness would be negligible, so that the analysis is performed in 2D. This test can be conviniently used to evaluate the influence of different boundary conditions applied on slip walls. The geometry of the test setup is shown in Figure 1a. The basic parameter, compared to the experiments is the time between opening the gate and the moment, when it is posible to look through the gate. |
- | V-funnel problem is one of the first problem, that was modeled. It is focused on boundary condition influence. In it's easiest form is modeled in 2D. The geometry is shown at figure below. | + | |{{: |
+ | | Fig. 1.a: Geometry of the test | Fig. 1.b: Boundary conditions | ||
- | {{: | + | \\ |
- | On the next picture | + | ==== Computational Model ==== |
+ | {{ : | ||
+ | The setup of 2D computational model is illustrated in Fig. 1b. The problem is modeled as a two-phase flow problem, consisting of two inmissible fluids: one representing | ||
+ | *yield stress 60 [Pa] | ||
+ | *plastic viscosity 20 [Pa*s] | ||
+ | So called "Slip with friction" | ||
- | {{: | + | The next picture ilustrates the computational mesh. The lower part is refined in order to improve accuracy of predicted flow pattern near the neck. The mesh contains 2907 nodes and 5567 tringular elements with linear interpolation (same approximation used for both velocity and pressure field). Since such element is not satisfying LBB condition, PSPG stabilization is used for preventing oscilations in pressure field. SUPG stabilization improving accuracy in connection with non-linear convective term is also used. For further information, |
- | The link below contains input file of V-funnel simulation | + | The link below contains |
{{: | {{: | ||
- | Description of input file can be found here: [[tailorcrete: | + | The general |
+ | |||
+ | ==== Results ==== | ||
On the video below, motion of concrete-air interface is shown. The characteristic " | On the video below, motion of concrete-air interface is shown. The characteristic " | ||
- | {{: | + | {{video> |
+ | |||
+ | ==== References ==== | ||
+ | |||
+ | - BARTH, T.; SETHIAN, J.A. (2009), Numerical Schemes for the HamiltonJacobi and Level Set Equations on Triangulated Domains. Journal of computational physics, 145 1-40. | ||
+ | - TEZDUYAR, T : Stabilized Finite Element Formulations for Incompressible Flow Computations, |
tailorcrete/examples/v-funnel.1343134112.txt.gz · Last modified: 2012/07/24 14:48 by kolarfil