Difference between revisions of "HowTo Import a fluent mesh with interfaces"

Revision as of 15:55, 15 March 2007

1 Purpose

The purpose of this short HowTo is to explain the few steps that are necessary in order to read a fluent mesh that contains interfaces. Valid versions:

2 How is it done

A mesh with an interface is a mesh containing two overlapping surfaces that do not necessary share the same discretization nodes, as seen in Figure 1.

Figure 1 Non-conformal mesh

To convert such a mesh, just use fluentMeshToFoam utility. Let consider the current case, where an "inlet", an "outlet" and two interface "interface_coarse" and "interface_fine" boundaries are defined. The rest of the boundaries are considered walls.

fluentMeshToFoam ./ test_interfaces test_interface/geometry/test_interface.msh

Once imported, the mesh consists of actually two separated volumes, by the interface_fine and interface_coarse surfaces. The second step is to stitch the meshes by spliting the faces of the two interfaces creating polyhedral cells, so they match each other face to face and node to node:

stitchMesh ./ test_interfaces interface_fine interface_coarse

Now the mesh looks something like in Figure 2.

Figure 2 Stiched mesh

The utility will preserve also the original patches as boundaries, but since they are no longer needed, they can be safely deleted from the polyMesh/boundary file.

3 Download

The sources of the test case can be downloaded from: [test_interfaces]

@@ Line 10: / Line 10: @@
 </div>
 Once imported, the mesh consists of actually two separated volumes, by the interface_fine and interface_coarse surfaces.
-The second step is to stitch the meshes by spliting the faces of the two interfaces creating polyhedral cells:
+The second step is to stitch the meshes by spliting the faces of the two interfaces creating polyhedral cells, so they match each other face to face and node to node:
 <div align=center>
   stitchMesh ./ test_interfaces interface_fine interface_coarse