FEM ConstraintInitialFlowVelocity: Difference between revisions

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{{Docnav
{{Docnav
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintMagnetization|Constraint magnetization]]
|[[FEM_ConstraintInitialPressure|Constraint initial pressure]]
|[[FEM_ConstraintInitialPressure|Constraint initial pressure]]
|[[FEM_Workbench|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconL=FEM_ConstraintMagnetization.svg
|IconR=FEM_ConstraintInitialPressure.svg
|IconR=FEM_ConstraintInitialPressure.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
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{{GuiCommand
{{GuiCommand
|Name=FEM ConstraintInitialFlowVelocity
|Name=FEM ConstraintInitialFlowVelocity
|MenuLocation=Model → Fluid ConstraintsConstraint initial flow velocity
|MenuLocation=Model → Fluid boundary conditionsInitial flow velocity condition
|Workbenches=[[FEM_Workbench|FEM]]
|Workbenches=[[FEM_Workbench|FEM]]
|SeeAlso=[[FEM_ConstraintFlowVelocity|FEM Constraint flow velocity]], [[FEM_ConstraintInitialPressure|FEM Constraint initial pressure]]
|SeeAlso=[[FEM_ConstraintFlowVelocity|Constraint flow velocity]], [[FEM_ConstraintInitialPressure|Constraint initial pressure]]
}}
}}


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Creates an initial flow velocity constraint for a fluid flow analysis.
Creates an initial flow velocity condition for a fluid flow analysis.


==Usage== <!--T:10-->
==Usage== <!--T:10-->


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#* Either press the toolbar button {{Button|[[Image:FEM_ConstraintInitialFlowVelocity.svg|16px]] '''FEM_ConstraintInitialFlowVelocity'''}} or select the menu {{MenuCommand|Model → Fluid Constraints → [[Image:FEM_ConstraintInitialFlowVelocity.svg|16px]] Constraint initial flow velocity}}.
# Press the {{Button|[[Image:FEM_ConstraintInitialFlowVelocity.svg|16px]] [[FEM_ConstraintInitialFlowVelocity|Initial flow velocity condition]]}} button or select the menu {{MenuCommand|Model → Fluid boundary conditions → [[Image:FEM_ConstraintInitialFlowVelocity.svg|16px]] Initial flow velocity condition}}.
# Enter an initial flow velocity value for the analysis. The value is entered as a combination of the 3 main cartesian vectors components (X,Y,Z).
# Enter an initial flow velocity value for the analysis. The value is entered as a combination of the 3 main cartesian vectors components (X,Y,Z).
# For a 3D analysis, select a 'solid' (body) from your model, for a 2D analysis select a face.
# For a 3D analysis, select a 'solid' (body) from your model, for a 2D analysis select a face. However, it is also possible to select a face (e.g. the inlet of a pipe) in 3D or an edge in 2D.


==Limitation== <!--T:11-->
==Formulas== <!--T:15-->


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For a description how to input formulas, see section ''Formulas'' in the page for the [[FEM_ConstraintFlowVelocity#Formulas|Flow velocity constraint]].
*The constraint cannot be oriented other then using the main Cartesian components. This is a limitation of Elmer.


==Notes== <!--T:13-->
==Notes== <!--T:13-->


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In the most simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.
In simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.




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{{Docnav
{{Docnav
|[[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]
|[[FEM_ConstraintMagnetization|Constraint magnetization]]
|[[FEM_ConstraintInitialPressure|Constraint initial pressure]]
|[[FEM_ConstraintInitialPressure|Constraint initial pressure]]
|[[FEM_Workbench|FEM]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_ConstraintElectrostaticPotential.svg
|IconL=FEM_ConstraintMagnetization.svg
|IconR=FEM_ConstraintInitialPressure.svg
|IconR=FEM_ConstraintInitialPressure.svg
|IconC=Workbench_FEM.svg
|IconC=Workbench_FEM.svg
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Latest revision as of 23:22, 13 November 2023

FEM ConstraintInitialFlowVelocity

Menu location
Model → Fluid boundary conditions → Initial flow velocity condition
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
Constraint flow velocity, Constraint initial pressure

Description

Creates an initial flow velocity condition for a fluid flow analysis.

Usage

  1. Press the Initial flow velocity condition button or select the menu Model → Fluid boundary conditions → Initial flow velocity condition.
  2. Enter an initial flow velocity value for the analysis. The value is entered as a combination of the 3 main cartesian vectors components (X,Y,Z).
  3. For a 3D analysis, select a 'solid' (body) from your model, for a 2D analysis select a face. However, it is also possible to select a face (e.g. the inlet of a pipe) in 3D or an edge in 2D.

Formulas

For a description how to input formulas, see section Formulas in the page for the Flow velocity constraint.

Notes

In simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.