On the hydrodynamic stability of channel flow with cross flow

Authors: Fransson, J. H. M., Alfredsson, P.H.
Document Type: Article
Pubstate: Published
Journal: Phys. Fluids
Volume: 15   436-441
Year: 2003


We study plane channel flow, with a homogeneous cross flow through porous walls, mainly with respect to the stability to two-dimensional wave disturbances. Since the stability of a shear flow depends both on the velocity distribution and the Reynolds number we partly investigated this flow under the conditions that the flow Reynoldes number was constant. The flow exhibits some interesting and unexpected stability characteristics. The effect of the cross flow was for certain parameter regions stabilizing and for others destabilizing. The latter result is in contrast to previous studies.