IUTAM Symposium on Flow Control and MEMS : Proceedings of the IUTAM Symposium Held at the Royal Geographical Society, 19-22 September 2006, Hosted by Imperial College, London, England

The Symposium brought together many of the world’s experts in fluid mechanics, microfabrication and control theory to discover the synergy that can lead to real advances and perhaps find ways in which collaborative projects may proceed. The meeting website shows the high profile of the meeting (IUTAM sponsorship brings a very considerable cachet: keynote speakers are leaders in their fields; representatives from industry are from companies who have key requirements in flow control — Airbus, BAE SYSTEMS, Rolls Royce, MTU, ONERA, Renault, Peugeot-Citroën — gathered largely from the aerospace and automotive communities. A key driver was the improvement in flow efficiency to reduce drag, and thereby emissions arising from transport. One session was dedicated to industrial representatives offering views on current problems and the identification of appropriate MEMS technology to provide solutions. About 65 papers were presented. Academics from North America, the UK, France, Germany, Switzerland, Spain, Italy, Israel, Australia and China attended. Front Matter....Pages i-xv Front Matter....Pages 1-1 High Power Density MEMS: Materials and Structures Requirements....Pages 3-13 MEMS for Flow Control: Technological Facilities and MMMS Alternatives....Pages 15-24 MEMS-Based Electrodynamic Synthetic Jet Actuators for Flow Control Applications....Pages 25-32 Suction and Oscillatory Blowing Actuator....Pages 33-44 Numerical Investigation of a Micro-Valve Pulsed-Jet Actuator....Pages 45-51 Characterization of MEMS Pulsed Micro-Jets with Large Nozzles....Pages 53-58 Magnetically Actuated Microvalves for Active Flow Control....Pages 59-65 Micromachined Shear Stress Sensors for Flow Control Applications....Pages 67-73 Front Matter....Pages 75-75 Synthetic Jets and Their Applications for Fluid/Thermal Systems....Pages 77-93 Is Helmholtz Resonance a Problem for Micro-Jet Actuators?....Pages 95-101 Passive Scalar Mixing Downstream of a Synthetic Jet in Crossflow....Pages 103-109 Towards a Practical Synthetic Jet Actuator for Industrial Scale Flow Control Applications....Pages 111-118 Measurements of Synthetic Jets in a Boundary Layer....Pages 119-125 Large-Eddy Simulations of Synthetic Jets in Stagnant Surroundings and Turbulent Cross-Flow....Pages 127-134 Characteristics of Small-Scale Synthetic Jets — Numerical Investigation....Pages 135-140 Large Eddy Simulations of Transitional and Turbulent Flows in Synthetic Jet Actuators....Pages 141-144 Front Matter....Pages 145-145 Model Reduction and Control of a Cavity-Driven Separated Boundary Layer....Pages 147-155 Collaborative Studies on Flow Separation Control....Pages 157-166 High Resolution PIV Study of Zero-Net-Mass-Flow Lift Enhancement of NACA 0015 Airfoil at High Angles of Attack....Pages 167-173 Separation Control along a NACA 0015 Airfoil Using a Dielectric Barrier Discharge Actuator....Pages 175-181 Front Matter....Pages 145-145 Dynamic Surface Pressure Based Estimation for Flow Control....Pages 183-189 The Control of Laminar Separation Bubbles Using High- and Low-Amplitude Forcing....Pages 191-197 Control of Subsonic Flows with High Voltage Discharges....Pages 199-202 Control of Flow Separation on a Wing Profile Using PIV Measurements and POD Analysis....Pages 203-207 Control of the Shear-Layer in the Wake of an Axisymmetrical Airfoil Using a DBD Plasma Actuator....Pages 209-215 Front Matter....Pages 217-217 Models for Adaptive Feedforward Control of Turbulence....Pages 219-227 Minimum Sustainable Drag for Constant Volume-Flux Pipe Flows....Pages 229-235 Enhancement of Suboptimal Controllability in Wall Turbulence....Pages 237-242 An Improvement of Opposition Control at High Reynolds Numbers....Pages 243-249 Direct Numerical Simulation of Alternated Spanwise Lorentz Forcing....Pages 251-257 Boundary Layer Control for Drag Reduction by Lorentz Forcing....Pages 259-265 Multi-Scale Flow Control for Efficient Mixing: Laboratory Generation of Unsteady Multi-Scale Flows Controlled by Multi-Scale Electromagnetic Forces....Pages 267-272 Multi-Scale Flow Control for Efficient Mixing: Simulation of Electromagnetically Forced Turbulent-Like Laminar Flows....Pages 273-277 Front Matter....Pages 279-279 Active Control of Laminar Boundary Layer Disturbances....Pages 281-292 Low-Dimensional Tools for Closed-Loop Flow-Control in High Reynolds Number Turbulent Flows....Pages 293-310 Evolutionary Optimization of Feedback Controllers for Thermoacoustic Instabilities....Pages 311-317 Active Cancellation of Tollmien-Schlichting Instabilities in Compressible Flows Using Closed-Loop Control....Pages 319-331 Optimal Boundary Flow Control: Equivalence of Adjoint and Co-State Formulations and Solutions....Pages 333-337 Optimal Growth of Linear Perturbations in Low Pressure Turbine Flows....Pages 339-343 Simulations of Feedback Control of Early Transition in Poiseuille Flow....Pages 345-348 Front Matter....Pages 279-279 A Switched Reduced-Order Dynamical System for Fluid Flows under Time-Varying Flow Conditions....Pages 349-352 Strategies for Optimal Control of Global Modes....Pages 353-357 Front Matter....Pages 359-359 Modeling and Development of Synthetic Jet Actuators in Flow Separation Control Application....Pages 361-364 Feedback Control Using Extremum Seeking Method for Drag Reduction of a 3D Bluff Body....Pages 365-372 Flow Control in Turbomachinery Using Microjets....Pages 373-380 ONERA/IEMN Contribution within the ADVACT Program: Actuators Evaluation....Pages 381-386 Control of Flow-Induced Vibration of Two Side-by-Side Cylinders Using Micro Actuators....Pages 387-391 Improvement of the Jet-Vectoring through the Suppression of a Global Instability....Pages 393-396 Front Matter....Pages 397-397 Experimental Optimization of Bionic Dimpled Surfaces on Axisymmetric Bluff Bodies for Drag Reduction....Pages 399-403 Flow Regularisation and Drag Reduction around Blunt Bodies Using Porous Devices....Pages 405-408 The Effects of Aspect Ratio and End Condition on the Control of Free Shear Layers Development and Force Coefficients for Flow Past Four Cylinders in the In-line Square Configuration....Pages 409-413 Numerical Simulation on the Control of Drag Force and Vortex Formation by Different Wavy (Varicose) Cylinders....Pages 415-419 Passive Multiscale Flow Control by Fractal Grids....Pages 421-425 Hydraulic Model of the Skin Friction Reduction with Surface Grooves....Pages 427-431 Vortex Shedding behind a Tapered Cylinder and Its Control....Pages 433-436 Control of a Separated Flow over a Smoothly Contoured Ramp Using Vortex Generators....Pages 437-441 Biomimetic Flight and Flow Control: Learning from the Birds....Pages 443-447 Back Matter....Pages 449-454 The Symposium brought together many of the world’s experts in fluid mechanics, microfabrication and control theory to discover the synergy that can lead to real advances and perhaps find ways in which collaborative projects may proceed. The high profile meeting was attended by keynote speakers who are leaders in their fields. A key driver was the improvement in flow efficiency to reduce drag, and thereby emissions arising from transport. About 65 papers were presented.