Aryan Moody
Using hibernating turbulence to increase maximum drag-reduction.
Email: a.moody@ncl.ac.uk
Supervisors
School of Engineering
School of Mathematics, Statistics and Physics
Project description
Experiments in channel flows close to the point of transition to-turbulence were recently carried out. The investigations found short time periods where the instantaneous wall-shear stress drops significantly below the average wall-shear stress. These intervals are known as hibernating turbulence. During the intervals, the velocity approaches the maximum drag-reduction (MDR) asymptote. This profile is more often found when we dissolve small quantities of a highly drag-reducing additive in the working fluid.
This project will detect hibernating turbulence in boundary-layer flows. Hibenating turbulence can lead to disruptive technologies. Such technologies can induce or prolong states of hibernation to achieve the high levels of drag reduction associated with MDR. The technologies would be effective in situations where we are unable to use additives. An example of this is the flows over aerodynamic vehicles.
Publications
- Lai J, Moody A, Chakraborty N. Turbulent kinetic energy transport in head-on quenching of turbulent premixed flames in the context of Reynolds Averaged Navier Stokes simulations. Fuel 2017, 199, 456-477.
- Mahfoze OA, Moody A, Wynn A, Whalley RD, Laizet S. Reducing the skin-friction drag of a turbulent boundary-layer with low-amplitude wall-normal blowing within a Bayesian optimization framework. Physical Review Fluids 2019, 4, 1-23.
Interests
Football, hiking.
Qualifications
- MEng Mechanical Engineering, Newcastle University, 2017.
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