Drag Reduction Effect of Turbulent Flow by Synchronized Wall-Oscillation in Annular Pipe

Key Points

• The synchronized wall-oscillation technique results in notable drag reduction in turbulent flow.
• Drag reduction was measured at levels exceeding 30% under specific conditions in the annular pipe.
• Observational analysis evaluated fluid dynamics in an annular pipe using synchronized wall-oscillation.
• These findings may enable improved designs for fluid transport systems, potentially lowering energy consumption.