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Published July 27, 2005 | Published
Book Section - Chapter Open

Pressure-driven wave propagation in mm-scale channels

Austin, Joanna


Miniaturized analysis systems, which may potentially revolutionize detection of air-borne biological or chemical agents through increased portability and real time response, also present exciting fundamental challenges. Development of integrated total analysis systems will depend on optimizing the interaction of multiple components such as valves, injectors, pumps, and channels. In pressure-driven systems, such components may produce finite amplitude waves and wave attenuation may then be a key design factor in optimizing both devices that operate on steady-state assumptions and devices where unsteadiness is cultivated, for example mixers. A fundamental experimental investigation of wave propagation as a function of the channel size was performed. A shock wave is transmitted into mm-scale channels to achieve a well-characterized initial condition. Wave attenuation and structure information is obtained from time-of-arrival data and pressure histories along the channel. Experimental results are compared with models developed for the analogous flow regime of wave propagation through macroscale channels in low pressure environments.

Additional Information

© 2005 American Physical Society. Date submitted: 27 Jul 2005. Abstract ID: BAPS.2005.DFD.HM.3

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Published - MWS_DFD05-2005-000195.pdf


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