FEM MeshTransfiniteVolume
Appearance
|
|
| Menu location |
|---|
| Mesh → GMSH Refinements → Structured Transfinite Volume |
| Workbenches |
| FEM |
| Default shortcut |
| None |
| Introduced in version |
| 1.2 |
| See also |
| FEM tutorial |
| Solvers |
|---|
| All |
Description[edit | edit source]
The FEM MeshTransfiniteVolume command creates a structured mesh in a 4- or 5-sided volume bounded by transfinite surfaces.
Task panel of the MeshTransfiniteVolume tool
Usage[edit | edit source]
- To enable the command a
Mesh From Shape by Gmsh must be provided first.
- Select the Mesh object in the Tree View.
- There are several ways to invoke the command:
- Press the
Structured Transfinite Volume button.
- Select the Mesh → GMSH Refinements →
Structured Transfinite Volume option from the menu.
- Press the
- Optionally, use the Mixed mesh elements checkbox.
- Optionally, use the Auto apply transfinite surfaces and curves checkbox and select the Surface type (Left, Right, AlternateRight or AlternateLeft, specify the number of nodes, distribution type (Constant, Bump, Bump Inverted, Progression or Progression Inverted) and the corresponding coefficient.
- Optionally, use the Recombine checkbox. If activated, all edges and surfaces belonging to the selected volumes that do not have transfinite definitions already become transfinite automatically. Use strategically placed transfinite curve and surface definitions to guide the automatic algorithm.
- Press the Add button. Select a solid. To remove objects from the selection, press the Remove button.
- Click the OK button.
- Close the task.
- Result: You now should see a new
TransfiniteVolumeobject under theFEMMeshGmshobject in your active analysis container.
- Result: You now should see a new
- Double-click on the
FEMMeshGmshparent object in your Model Tree and press Apply to force a mesh recalculation. - Close the task.
After the mesh has been created you can change its properties using the Property View. After you changed a property, you must reopen the Gmsh dialog again and click the Apply button. (You can leave the dialog open while changing properties.)
You can create as many different transfinite volumes as needed.
Notes[edit | edit source]
- Using this tool with the Auto apply transfinite surfaces and curves and Recombine checkboxes enabled is the easiest way to generate structured hexahedral meshes using the transfinite Gmsh algorithm. All subvolumes must have 5 or 6 faces with 3 or 4 edges each, though.
Structured hexahedral mesh generated using the transfinite volume tool (the lug was divided into subvolumes having the proper number of surfaces and edges)
- Materials: Solid Material, Fluid Material, Non-Linear Mechanical Material, Reinforced Material (Concrete); Material Editor
- Element Geometry: Beam Cross Section, Beam Rotation, Shell Plate Thickness, Fluid Section for 1D Flow
- Electromagnetic Boundary Conditions: Electrostatic Potential Boundary Condition, Current Density Boundary Condition, Magnetization Boundary Condition, Electric Charge Density
- Fluid Boundary Conditions: Initial Flow Velocity Condition, Initial Pressure Condition, Flow Velocity Boundary Condition
- Geometrical Analysis Features: Plane Multi-Point Constraint, Section Print Feature, Local Coordinate System
- Mechanical Boundary Conditions and Loads: Fixed Boundary Condition, Rigid Body Constraint, Displacement Boundary Condition, Contact Constraint, Tie Constraint, Spring Boundary Condition, Force Load, Pressure Load, Centrifugal Load, Gravity Load
- Thermal Boundary Conditions and Loads: Initial Temperature, Heat Flux Load, Temperature Boundary Condition, Body Heat Source
- Overwrite Constants: Constant Vacuum Permittivity
- Mesh: Mesh From Shape by Netgen, Mesh From Shape by Gmsh, Mesh Boundary Layer, Mesh Refinement, Mesh Group, Erase Elements, FEM Mesh to Mesh
- Solve: Solver CalculiX, Solver Elmer, Solver Mystran, Solver Z88; Mechanical Equations: Elasticity Equation, Deformation Equation; Electromagnetic Equations: Electrostatic Equation, Electricforce Equation, Magnetodynamic Equation, Magnetodynamic 2D Equation, Static Current Equation; Flow Equation, Flux Equation, Heat Equation, Solver Job Control, Run Solver
- Results: Purge Results, Show Result, Apply Changes to Pipeline, Post Pipeline From Result, Pipeline Branch, Warp Filter, Scalar Clip Filter, Function Cut Filter, Region Clip Filter, Contours Filter, Glyph Filter, Line Clip Filter, Stress Linearization Plot, Data at Point Clip Filter, Calculator Filter; Filter Functions: Plane, Sphere, Cylinder, Box; Data Visualizations: Create Lineplot, Create Histogram, Create Table
- Utilities: Clipping Plane on Face, Remove All Clipping Planes, FEM Examples; Clear FEM Mesh, Display Mesh Info
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub