XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX''"> Application Region and Companion Region
The Contact, Coupled Advection and Gap radiation loads have two regions ---- the application region and the companion region (or region 2). They are commonly referred to as the master region and the slave region in MSC Sinda.
For the Coupled Advocation load, the region 2 (slave) can be Nodal or 1D. Actually the 1D curve will be converted into nodes internally. The nodes or 1D curve will always be the slave. The “closest neighbor method” is used to determine the links.
For the Contact or Gap Radiation loads, the “projection method” is used to determine the contact area and links. The projection is always from the slave to the master. The meshes on the master and slave do not have to match each other. Although the matching meshes will certainly cause the most accurate result, it is not always convenient to keep the mesh congruent and lined up across the interface.
There are two main factors to determine which surface should be the master or slave: projection efficiency and result accuracy. Usually we will recommend using a similar mesh size on both the master and slave surfaces. We recommend the following guidelines:
1. Use the smaller surface as the slave for better projection efficiency.
2. Use the surface with the finer mesh as the slave for better result accuracy.
3. If the bigger surface has a much finer mesh, use it as the slave for better accuracy, even though it may be a little bit slower.
4. Avoid using a very rough mesh for the slave, no matter whether the surface is bigger or smaller.
For edge to edge contact, the thickness of the slave surface will be used.