Much of the current research in turbulent drag reduction centers on controlling locally individual streamwise vortices. These techniques involve complex closed loop control systems that become difficult or impossible to implement in practice. Extensive numerical simulation has suggested that introducing streamwise vorticity in the form of a transverse unsteady excitation can reduce drag far more effectively than spanwise vorticity control and would only require simple open loop control making it far easier to implement. In this work we implemented the above concept using Lorentz force actuators consisting of alternating pairs of electrodes and magnets. Specifically, we used a transverse oscillating square current waveform, and conducted exp...
We experimentally assess the capabilities of an active, open-loop technique for drag reduction in tu...
Over the last two decades, both experiments and simulations have demonstrated that transverse wall o...
Lorentz force velocimetry (LFV) is a contactless technique for the measurement of liquid metal flowr...
Turbulent control and drag reduction in a channel flow via a bidirectional traveling wave induced by...
The research group FOR1779 “active drag reduction via wavy surface oscillations” develops robust met...
AbstractNumerical simulations and experimental research are both carried out to investigate the cont...
The research unit FOR 1779 develops robust methods for the reduction of turbulent friction drag via ...
The streamwise and spanwise travelling waves induced by spanwise Lorentz force are studied for skin-...
The research unit FOR 1779 develops robust methods for the reductionof turbulent friction drag via w...
The present work aims at contributing to the development of active flow control via spanwise wall os...
Lorentz-forcing spanwise travelling wave actuation in the turbulent boundary layer has been studied ...
The effect of time-periodic spanwise Lorentz forces on flow separation in a weakly conductive fluid\...
Thispaper presents a system-theory approach to control of a two-dimensionalturbulent flow of saltwat...
Several techniques based on spanwise focing were introduced in the last decade \cite{du-symeonidis-k...
This work discusses classic feedback control (PD) and Iterative Learning Control (ILC) applied to a ...
We experimentally assess the capabilities of an active, open-loop technique for drag reduction in tu...
Over the last two decades, both experiments and simulations have demonstrated that transverse wall o...
Lorentz force velocimetry (LFV) is a contactless technique for the measurement of liquid metal flowr...
Turbulent control and drag reduction in a channel flow via a bidirectional traveling wave induced by...
The research group FOR1779 “active drag reduction via wavy surface oscillations” develops robust met...
AbstractNumerical simulations and experimental research are both carried out to investigate the cont...
The research unit FOR 1779 develops robust methods for the reduction of turbulent friction drag via ...
The streamwise and spanwise travelling waves induced by spanwise Lorentz force are studied for skin-...
The research unit FOR 1779 develops robust methods for the reductionof turbulent friction drag via w...
The present work aims at contributing to the development of active flow control via spanwise wall os...
Lorentz-forcing spanwise travelling wave actuation in the turbulent boundary layer has been studied ...
The effect of time-periodic spanwise Lorentz forces on flow separation in a weakly conductive fluid\...
Thispaper presents a system-theory approach to control of a two-dimensionalturbulent flow of saltwat...
Several techniques based on spanwise focing were introduced in the last decade \cite{du-symeonidis-k...
This work discusses classic feedback control (PD) and Iterative Learning Control (ILC) applied to a ...
We experimentally assess the capabilities of an active, open-loop technique for drag reduction in tu...
Over the last two decades, both experiments and simulations have demonstrated that transverse wall o...
Lorentz force velocimetry (LFV) is a contactless technique for the measurement of liquid metal flowr...