Finite size vortices in the wake of an accelerated bent lamina

A theory of an unsteady incompressible inviscid flow past an accelerated lamina, moving across the fluid, is extended to address a bent (rather than flat) lamina and finite size (rather than point) vortices in its wake. It is shown that when the velocity of the lamina varies with time t as tm, the distance of the vortices from the lamina and the size of their cores grow, initially, as t(2m+2)/3 and t(2m+2)/3exp(-Ct-(8m+2)/3), respectively, where C is a strictly positive constant. The growth rate of the core dimensions with time seems to provide a plausible energy argument for the experimentally observed wake asymmetry that culminates the initial symmetric vortex arrangement.