Using Structured and Unstructured Mesh with Boundary Layers

This example demonstrates a geometry where free tetrahedral mesh is used in one domain and a swept mesh is used in another domain. The domains are separated by a mesh control face, which is automatically removed once the domains on both sides are meshed. Finally boundary layers are added, without the need to respect the (now removed) mesh control face.

1	Add a Mesh Control Faces () node from the Geometry toolbar, Virtual Operations menu () (or right-click the Geometry node and select it from the Virtual Operations submenu).

2	Select the face separating the domains in the Faces to include selection using the scroll wheel for selecting the interior boundary.

3	Click Build Selected (). The face is removed. There is now only one domain.

4	Add a Free Tetrahedral () node from the Mesh toolbar. Note that the face has reappeared and that there are two domains.

5	Add the cylinder-shaped domain with a hole to the selection list.

6	Click the Size () node and select Finer as the Predefined element size. Click Build Mesh ().

7	Add a Swept () node from the Mesh toolbar.

8	Add a Distribution () node to Swept 1 from the Mesh toolbar.

9	Select Predefined distribution type and enter 10 in the Number of elements field and 3 in the Element ratio field. Click Build Mesh ().

10	Add a Boundary Layers () node from the Mesh toolbar.

11	In the Model Builder, click the Boundary Layer Properties () node under Boundary Layers 1.

12	Add (for example) the sides of the geometry to the selection list

13	Click the Build Mesh button () or press F8 to build the entire mesh. The mesh control face is now removed and the boundary layer mesh nodes are not located where the boundary was.

Boundary Layer Meshing Model Examples

For an example of the Boundary Layer and Boundary Layer Properties features:

•	If you have the AC/DC Module, see Iron Sphere in a 20 kHz Magnetic Field: Application Library path ACDC_Module/Tutorials/iron_sphere_20khz_bfield.

•	If you have the Acoustics Module, see Acoustic Scattering off an Ellipsoid: Application Library path Acoustics_Module/Tutorials/acoustic_scattering.

•	If you have the Batteries & Fuel Cells Module, see Liquid-Cooled Lithium-Ion Battery Pack: Application Library path Batteries_and_Fuel_Cells_Module/Thermal_Management/li_battery_pack_3d.

•	If you have the CFD Module, see Turbulent Flow Over a Backward Facing Step: Application Library path CFD_Module/Single-Phase_Benchmarks/turbulent_backstep.

•	If you have the Chemical Reaction Engineering Module, see Dissociation in a Tubular Reactor: Application Library path Chemical_Reaction_Engineering_Module/Reactors_with_Mass_and_Heat_Transfer/dissociation.

•	If you have the Electrochemistry Module, see Wire Electrode: Application Library path Electrochemistry_Module/Electrochemical_Engineering/wire_electrode.

•	If you have the Heat Transfer Module, see Turbulent Flow Over a Backward Facing Step: Application Library path Heat_Transfer_Module/Verification_Examples/turbulent_backstep.

•	If you have the Plasma Module, see 3D ICP Reactor, Argon Chemistry: Application Library path Plasma_Module/Inductively_Coupled_Plasmas/argon_3d_icp.