Figure 1:

Specifications of the compressed block benchmark (Section 4.1). The quantity of interest is the y-displacement as measured at the encircled point. The structure, shown here in its initial configuration and denoted by ${\Omega }_0^{\text{S}}$, is immersed in a fluid denoted by ${\Omega }_0^{\text{f}}$. The entire computational domain is $\Omega ={\Omega }_t^{\text{f}}\cup {\Omega }_t^{\text{s}}$. Zero fluid velocity is enforced on the boundary of Ω.