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Home / Examples / Fluid Analysis [Bernoulli] / Example 14: Dam Break Analysis
Example 14: Dam Break Analysis
General
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The VOF method is used to analyze the dam break.
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The volume fractions of water and air each are solved.
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Unless specified in the list below, the default conditions are applied.
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Obtain this session's project file. (Right-click and choose 'Save link as')
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Results will vary depending on Femtet version and the PC environment.
Analysis Space
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Item |
Settings |
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Analysis Space |
2D |
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Model Unit |
m |
Analysis Conditions
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Item |
Tab |
Settings |
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Solver |
Solver Selection |
Fluid Analysis [Bernoulli] |
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Analysis Types |
Fluid Analysis |
Transient Analysis |
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Free Surface Analysis (VOF Method) |
Fluid Analysis |
Free Surface Analysis (VOF Method): Select |
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Free Surface Analysis (VOF Method) Setting |
Fluid Analysis |
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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Model
Body Attributes and Materials
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Body Number/Type |
Body Attribute Name |
Material Name |
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0/Face |
Water |
100_Water * |
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1/Face |
Air |
000_Air * |
* Available from the material DB
Boundary Conditions
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Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
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InletOutlet/Edge |
Fluid |
Inlet/Outlet |
Natural Inflow/ Natural Outflow |
Results
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 collapses with time and moves to the right toward the wall.
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