Flow Structures (IMAGE) American Institute of Physics Caption Comparison of turbulent flow structures over an airfoil when a pulsed linear (left) and a serpentine (right) plasma actuator are used to control the flow. Credit M. Riherd, APRG Usage Restrictions This image may be used only with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.