Figure 8.

Errors in u and p in L¹, L², and L^∞ norms for the static (γ = 0) version of the orthotropic shell model of sec. 5.1.2. Errors for the unified formulation appear as solid lines, and errors for the partitioned formulation appear as dashed lines. Reference lines with slope −1 are provided for the u error data. For p, reference lines with slopes −1 and −0.5 are provided for the L¹ and L² norm data, respectively. Because this test includes discontinuities in the pressure at fluid-structure interfaces, the present method does not yield convergence in p in the L^∞ norm. The partitioned formulation generally yields improved accuracy compared to the unified formulation, especially for the pressure for relatively coarse structural mesh spacings.