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. 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.