Isoparametric tetrahedron
Nodes
The element has 4 to 10 nodes. Midside nodes may be omitted.
Each node has displacements $[u,v,w]$ and temperature $[T].$
Edges
The element has 6 edges.
| Edge number | Node order |
|---|---|
| 1 | 1 – (5) – 2 |
| 2 | 2 – (6) – 3 |
| 3 | 3 – (7) – 1 |
| 4 | 1 – (8) – 4 |
| 5 | 2 – (9) – 4 |
| 6 | 3 – (10) – 4 |
Faces
The element has 4 faces. Face numbers are depicted in the figure. Face normals point outward from the element.