Papers – Page 14 – TechConnect Briefs

Performance Limits of Micromachined Tunable-Cavity Filter

Moon J-S., Shkel A., University of California Irvine, US

This paper focuses on the performance limits of a tunable-cavity Fabry-Perot filter (FPF)implemented using MEMS technology.This is a versatile device capable of many functions,including light modulation and high precision sensing.Our goal is to explore challenges [...]

Coupled Electrostatic-Structures-Fluidic Analysis of a Micromirror

Turowski M., Chan E., Dionne P., CFD Research Corporation, US

For micromirrors used in optical MEMS, in addition to the static displacement-voltage characteristics, the accurate transient characterization of these devices is becoming increasingly important. The latter one is strongly affected by the viscous damping

Nonlinear Mechanics of Suspension Beams for a Micromachined Gyroscope

Davis W.O., Pisano A.P., University of California-Berkeley, US

We present a method for the calculation of the coefficients of cubic stiffening for tether-suspended micromachined systems. The analysis is based on a nonlinear rod theory, and enables the prediction of the maximum achievable motion [...]

Atomistic Simulation of Electro-Osmosis in a Nanometer-Scale Channel

Freund J.B., University of California at Los Angeles, US

An atomistic simulation of an electro-osmostic flow in a 50 ° A wide channel is performed to examine models for such flows and study its physical details. The working fluid considered is a 1.1M mean [...]

Simulation of Flow in Structurally Programmable Microfluidic Channels

Makhijani V.B., Reich A.J., Puntambekar A., Hong C., Ahn C., CFD Research Corporation, US

This paper describes the simulation of liquid filling in a structurally-programmable microfluidic delivery system being developed as part of a disposable biochip for clinical diagnostics. Flow control in the system is achieved by using passive [...]

Optimization of a MEMS Based Micro Capillary Pumped Loop for Chip-Level Temperature Control

Trebotich D., Kirshberg J., Teng J., Liepmann D., University of California, US

Recent results in the microfluidics group at the Berkeley Sensor and Actuator Center and the Air Force Research Laboratory have shown that a micro-capillary pumped loop (micro-CPL) can move extreme amounts of heat (< 200 [...]

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 [...]

Insects Separate Diffusing Particles in Parallel

Lawry J.V., California Academy of Sciences, US

The circulation of insects and other invertebrates transfers heat, mass, and momentum within micro-fluids through phase interfaces of complex geometry at size ranges important for developing compact energy and chemical systems. Pump size and vascular [...]

Use of Numerical Methods for Modeling and Simulating Capillary Driven Flows in Microchannels

Quinte A., Halstenberg S., Eggert H., Forschungszentrum Karlsruhe, DE

Today, medical test strips are used for rapid diagnostics and the quick and easy determination of biomedically relevant parameters, such as the content of glucose of the blood. For the transport of the test uid [...]

A Stochastic Projection Method for Microchannel Flow

Le Maitre O.P., Knio O.M., Ghanem R.G., Najm H.N., John's Hopkins University, US

The construction and implementaion of a stochastic flow solver is described. The solver combines a spectral stochastic uncertainty representation scheme with a finite difference projection method for flow simulation. The uncertainty quantification scheme is based [...]