Systems and methods for modifying fluid flowing over solid bodies are provided. A representative system incorporates a vorticity concentration-producing component and a synthetic jet actuator. The vorticity concentration-producing component is disposed on a pressure side of the solid body. The fluid flowing over the solid body remains attached to a surface of the solid body in a vicinity of the vorticity concentration-producing component. The synthetic jet actuator includes a jet housing that incorporates an internal chamber with a volume of fluid and an opening in the jet housing connecting the internal chamber to an external environment having the fluid. The synthetic jet actuator is operative to periodically change the volume within the internal chamber such that a synthetic jet stream comprising a series of fluid vortices is generated and projected in the external environment out from the opening of the jet housing resulting in a reduction in pressure drag of the solid body compared to the pressure drag exhibited by the solid body without operation of the synthetic jet actuator.