Feedback-free microfluidic oscillator with impinging jets
Arnaud Bertsch, Alessandro Bongarzone, Margaux Duchamp, Philippe Renaud, François Gallaire
Abstract
Microscale pulsatile liquid flows which self-oscillate in laminar flow conditions and are based on facing impinging jets were studied both experimentally and using direct numerical simulations. The two facing jets first bifurcate in opposite directions and later approach one another, collide, and switch sides, with a regular periodicity. Experimentally, the evolution of the self-oscillation frequency was shown to be dependent on the jet separation distance and average velocity. Simulated velocity fields provide information on vortical flow structure evolution at the self-oscillation onset.
Topics & Concepts
Microscale chemistryLaminar flowOscillation (cell signaling)MechanicsJet (fluid)PhysicsMicrofluidicsFlow (mathematics)Pulsatile flowClassical mechanicsMathematicsChemistryThermodynamicsMedicineBiochemistryMathematics educationCardiologyFluid Dynamics and Heat TransferMicrofluidic and Capillary Electrophoresis ApplicationsFluid Dynamics and Turbulent Flows