Virtual body with Internal Boundary Interfaces

One way to extend the Virtual Body functionality, e.g. to have also prism layers on the moving object is to combine virtual body with Internal Boundary Interfaces. With this virtual body can be used to extend the applicability of sliding interfaces from rotating regions to more generally moving (e.g. translating) regions.

The steps are: 

1. Create meshes for the Background region (stationary) without a cutout and for the Object region (moving)
2. Create a new Virtual Body Boundary inside the Background region
3. Assign the outer Part Surface of the Object region to the newly created Virtual Body Boundary
4. Create a new Interface between the Virtual Body Boundary and the external Boundary of the Object region
5. Assign a Virtual Body Motion to the Motion Specification of the Background region
6. Assign a new Rigid Motion (e.g., Translation) to the Object region as well as to the Virtual Body Motion of the Virtual Body Boundary

A sketch of the setup can be found in the following picture:

The overlapping cells of the moving region and the background regions are set inactive by the Virtual Body Model. Then the vertices of the Background region are being projected to the external object boundaries of the moving Object region. Ensure that the boundary interface is not moving into the wall boundaries of the background region. As depicted in the following picture:


Adapt the shape of the external object boundary if needed.