FEM MeshBoundaryLayer

Description
FEM MeshBoundaryLayer enables the user to set a localized set of meshing parameters by selecting a set of elements (Vertex, Edge, Face) and applying the parameters to it. It is especially useful for refining meshes close to edges or surfaces in flow simulations. For example, it can be used to refine the mesh in the vicinity of an air foil or obstacle in a flow.

The boundary layer has the advantage of creating highly defined, anisotropic meshes. As the name implies it supports accurate calculations near boundaries, e.g. a wall where friction occurs, generating a velocity gradient.

Usage

 * 1) To enable the function a mesh must be first provided [[Image:FEM_MeshGmshFromShape.svg|32px]] FEM mesh from shape by Gmsh.
 * 2) * Select the Mesh object in the Model Tree and press the button.
 * 3) * Select the Mesh object in the Model Tree and select the option from the menu.
 * 4) Edit the start element size, the growth rate and the number of growth layers.
 * 5) Select a vertex, edge, face.
 * 6) Click the  button.
 * 7) Close the task.
 * Result: You now should see a new object under the  object (see example #3 below) in your active analysis container.
 * 1) Double-click on the  parent object in your Model Tree and press  to force a mesh recalculation.
 * 2) Close the task.

After the mesh has been created you can change its properties using the property editor. After you changed a property, you must reopen the Gmsh dialog again and click the button. (You can leave the dialog open while changing properties.)

You can create as many different mesh boundary layers as needed.

Visual examples