High turbulence (lower panel) is typically seen in the accelerated near-bottom flow, at the sheared mid-water column interface and in the jump region.
Note the similarities in the structure of both isopycnals and turbulence in the two images (flow in the latter case is from left to right).
While form drag is generally ignored in large scale simulations of ocean circulation, it is included in simulations of atmospheric flows, where the form drag caused by flow over mountain ranges represents a critical loss of momentum. It is not known under what conditions oceanic form drag is of similar importance.
Form drag and mixing due to tidal flow past a sharp point, J. Phys. Oceanogr., 34, 1297-1312, 2004 (K. A. Edwards, P. MacCready, J.N. Moum, G. Pawlak, J. M. Klymak and A. Perlin) [pdf]
Internal hydraulic flows on the continental shelf: high drag states over a small bank, J. Geophys. Res., 106, 4593-4611, 2001 (J.D. Nash and J.N. Moum) [pdf]
Topographically-induced drag and mixing at a small bank on the continental shelf, J. Phys. Oceanogr., 30, 2049-2054, 2000 (J.N. Moum and J.D. Nash) [pdf]