Eulerian_boundary
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Data Structure: Eulerian_boundary |
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Description |
Defines data to apply the eulerian boundary load condition. |
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Eulerian_boundary NUM=ival where ival is the data structure number |
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Overview The Eulerian_boundary defines data to apply the Eulerian boundary load condition. This may be used for example to allow a specified amount of material to be injected or extracted from a layer of material such as sand or salt. It should be noted that the injection or removal of sediment volume is performed by moving the Eulerian boundaries in/out of the domain and then returning them to their original positions. Hence this operation introduces mesh distortion and frequent remeshing may be required.
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 | Name Name of the Eulerian boundary |
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Name of the Eulerian boundary (Maximum of 32 characters).
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| Active_flag Activation flag |
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Defines whether the Eulerian boundary is active. Generally not required as it is set by default. Valid values are: •-1 - Deactivate and remove if defined • 0 - Not defined • 1 - Defined and active (Default)
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| Eulerian_boundary_type Eulerian boundary type |
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Defines whether the Eulerian boundary is free or fixed/prescribed. Valid values are: • 0 - Free • 1 - Prescribed. Eulerian boundary defined by injection velocity or volume rate (default)
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| Lines List of lines defining Eulerian boundary |
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List of geometry lines of the model that define the Eulerian boundary.
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| Surfaces List of surfaces defining Eulerian boundary |
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List of geometry surfaces of the model that define the Eulerian boundary.
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| Eulerian_update_frequency Update frequency for Eulerian boundary check |
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Number of steps between each Eulerian update check (Default 10). This is used to reduce the number of unnecessary boundary update checks and is dependent on the expected rate of deformation in the analysis.
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| Volume_rate Rate of volume injected or extracted |
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Defines the rate of volume injection or extraction from the domain as: VLRATE =volume increment / time increment
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| Injection_velocity Velocity of material injected or extracted |
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Defines the actual velocity of the Eulerian boundary nodes moving in or out.
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| Injection_direction Injection or extraction direction |
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Defines the injection direction of the Eulerian boundary. The available options are: • "X_dir" - Injection velocity is in X direction • "Y_dir" - Injection velocity is in Y direction • "Z_dir" - Injection velocity is in Z direction
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| Time_curve Time curve name or number |
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Assigns a time curve, by name or number, to define a multiplication factor for the injection/extraction sediment rate as a function of time. If Time_curve is not defined, then the injection velocity or volume rate will be constant by default.
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| Geometry_set_name Name of a geometry set defining the Eulerian boundary |
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Name of a geometry set containing lines (2-D) or surfaces (3-D) that define the Eulerian boundary.
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