Extended Data Fig. 6: Computed Fluid Dynamics analysis of Tujiaaspis vividus.
From: Galeaspid anatomy and the origin of vertebrate paired appendages
a, 3D model including ventrolateral ridges in dorsal (dr), ventral (vn), lateral (lt) and frontal (fr) views. b, c, d, Computational domain (b), mesh overlying the models without (upper) and with (lower) ventrolateral fins in dorsal (dr) and ventral (vn) views, and general mesh (c) employed in the CFD analysis noting the different boundary conditions (in, inlet; ou, outlet; ns, non-slip; ss, slip symmetry), refinement volume (rf) and inflation layers (if).
