Home / Examples / Fluid Analysis [Bernoulli] / Example 14: Dam Break Analysis
The VOF method is used to analyze the dam break.
The volume fractions of water and air each are solved.
Unless specified in the list below, the default conditions are applied.
Results will vary depending on Femtet version and the PC environment.
Item |
Settings |
Analysis Space |
2D |
Model Unit |
m |
Item |
Tab |
Settings |
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Solver |
Solver |
Fluid Analysis [Bernoulli] |
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Analysis Types |
Fluid Analysis |
Transient Analysis |
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Multiphase Flow Setting |
Fluid Analysis |
Execute free surface analysis (VOF Method): Selected Phase Setting: Register [000_Air] and [100_Water]. Take into Account Weight: Selected |
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Detailed Settings |
Fluid Analysis Setup Details |
Control Volume Type: Cell-centered Base |
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Timestep |
Transient Analysis |
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Meshing Setup |
Mesh |
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Body Number/Type |
Body Attribute Name |
Material Name |
0/Face |
Water |
100_Water * |
1/Face |
Air |
000_Air * |
* Available from the material DB
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
InletOutlet/Edge |
Fluid |
Inlet/Outlet |
Natural Inflow/ Natural Outflow |
The volume fraction contours of phase 2 at 0, 0.25 [s], 0.5 [s], 0.75 [s], and 1.0 [s] are shown below.
The part of phase 2 (water) is illustrated in red.
It is observed that the water pillar will collapse over time and move to the right toward the wall.
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