On Flow Past Bodies in Aligned Magnetic Fields

In inviscid, incompressible flow past a body in a strong aligned magnetic field at very low magnetic Reynolds number, the flow far from the body may be rectilinear but non-uniform. The paper discusses the evolution of small perturbations towards or away from such a rectilinear flow and concludes that such evolution can only occur gradually (i.e. over many diameters) ahead of the body. Downstream the decay must occur close to the body. Two dimensional and axisymmetric flows are considered. 1