Bill Bulat
Ansys Employee
Hi Rodrigo,nThe easiest thing to do is to allow dissimilar meshes at the interfaces between the misaligned volumes (so that initially, they are NOT thermally joined). You can then thermally connect the conducting blocks at each of the interfaces between them even though the mesh nodes are neither coincident nor shared by the elements on either side of the interface. The simplest way to do that is to use the CEINTF (Constraint Equation INTerFace) command. Select the nodes on the interfacing surface belonging to one block and the elements of the other, then issue the CEINTF command. This will automatically create constraint equations that will interpolate the TEMP DOFs (using element shape functions) at the interface. It models perfect thermal contact.nAnother procedure which is harder to explain is to connect the dissimilar meshes with surface-to-surface contact elements (CONTA174 and TARGE170). This would allow you the option of specifying a finite thermal conductance at the interface (imperfect thermal contact).nAnother more tedious option is to try to create AREAs that are coplanar with all of the boundaries of all of the blocks (those that do not have a constant z coordinate) and that extend from the minimum z coordinate to the maximum z coordinate of all of the blocks. You can then use these to subdivide all of the blocks (which is only possible before meshing) with the VSBA command. You can then join the blocks by merging coincident keypoints (NUMM,KP). Now when the blocks are meshed the resulting mesh will be contiguous at the interfaces.nBest regards,nBillnn