David K. Heist
Department of Chemical Engineering University of Illinois Urbana, Illinois 61801, USA
Yang Na
Department of Chemical Engineering University of Illinois Urbana, Illinois 61801, USA
Thomas J. Hanratty
Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign Urbana, Illinois 61801, USA
Streamwise flow-oriented vortices play an important, if not dominant, role in generating Reynolds stresses. A new mechanism has been identified for forming these vortices. This involves the turning of spanwise arch vortices that occur at locations where the streamwise velocity profile develops a strong inflection.