Figure 19:

Specifications of the torsion benchmark (Section 4.4). The face opposite the applied torsion is kept fixed. The quantity of interest is the y-displacement as measured at the encircled area. To simplify the diagram of this three-dimensional test, we omit the computational domain in this figure describing the problem setup. In the IBFE model, however, the structure is contained within a computational domain with dimensions Ω = [0, L]³ and L = 9 cm, and the solid mesh is placed in the center of this domain. Zero fluid velocity is enforced on the boundary of Ω.