Large-eddy simulation and streamline coordinate analysis of flow over an axisymmetric hull

A new perspective on the analysis of turbulent boundary layers streamlined bodies is provided by deriving axisymmetric Reynolds-averaged Navier–Stokes equations in an orthogonal coordinate system aligned with streamlines, streamline-normal lines and plane symmetry. Wall-resolved large-eddy simulation using unstructured overset method performed to study flow about DARPA SUBOFF hull at a Reynolds number $Re_L = 1.1 \times 10^{6}$ based length free-stream velocity. The naturally normal wall surface perpendicular velocity far from body, which critical for studying concave streamwise curvature. momentum reduce differential form Bernoulli's equation $s$ – $n$ Euler curved streamlines outside layer. In laminar layer front hull, streamline represents balance advection, pressure gradient viscous stress, while between centripetal acceleration. mid-hull, curvature terms are negligible results conform traditional flat-plate layers. thick stern layer, reappear stresses. This explains characteristic variation static observed tails bodies.