Large Eddy Simulation of High Re Number Partially Separated Flow

Asymmetries in the wake of a submarine model in pitch

“…A primary pair of streamwise counterrotating vortices are seen to form on the leeward side of the model. Similar flow fields have been observed over a wide range of Reynolds numbers by, for example, Han & Patel (1979) for a 4.3:1 spheroid and Vatsa, Thomas & Wedan (1989), Fu, Shekarriz & Huang (1994), Chesnakas & Simpson (1997), Karlsson & Fureby (2009) and Feymark et al (2012) for a 6:1 prolate spheroid. Werlé (1962), Hornung & Perry (1984) and Bippes (1987) described the separation topologies over similar bodies at low and moderate angles of attack, but here we are concerned with the evolution of the streamwise counter-rotating vortices which comprise the turbulent wake of such bodies in pitch.…”