high speed visualization – TechConnect Briefs

On the Motion of a Bubble through Microchannel Contractions

Chio H., Jensen M.J., Wang X., Bruus H., Attinger D., Columbia University, US

We present the first transient pressure measurements and high-speed visualizations of a gas bubble passing through liquid-filled microchannel contractions. Results are compared with a simple theoretical model taking into account the Young-Laplace pressure drop, the [...]

Miniaturized High Speed Visualization Setup for the Diagnostics of Dynamical Processes in Microsystems

Brugger H., Maier C., Hofer E.P., University of Ulm, DE

For the real time visualization of the dynamics of MEMS it is often inevitable to use high speed camera systems because of the optical enlargement. The micro diagnostic system MinVis, which consists of a miniaturized [...]

Microflows with Moving Boundaries: Experiment and Simulation

Maier C., Hofer E.P., University of Ulm, DE

Surface forces and capillary effects can play a dominant role in fluidic microsystems. Therefore it is crucial for simulations to use accurate numerical approaches [1]. Furthermore experimental data gained from such surface dominated systems can [...]

Model Based Identification as a New Tool to Extract Physical Parameters of Microactuators from Measurements with Error Bounds

Rembe C., Hofer E.P., Tibken B., University of Ulm, DE

Model based evaluation of high speed cinematographic image sequences is demonstrated for a microrelay which was manufactured using the LIGA technology. The measurements of the microrelay have been performed with an experimental setup based on [...]