Title

Geometry-Based Macro-Tool Evaluation Of Non-Moving-Part Valvular Microchannels

Abstract

An examination of non-moving-part (NMP) microvalves using geometry-based tools is presented. On a microscale, valves without moving parts possess the potential to greatly benefit fluid delivery systems. To improve valve effectiveness, these 'valves' - which are little more than rectangular, multiple-path channels - require configurations that retard reverse-direction flow as much as possible relative to forward-direction flow. Application of current geometry-based macro-tools to the microchannels of interest provides much insight into pressure-loss/flow-rate relationships for these valves. It was observed that for forward flow, macro-tools predict pressure losses quite well. For reverse flow, transition losses at this scale appear too minute to completely describe experimental data. Yet, with a modified model, pressure-loss behavior can follow a somewhat similar trend for the reverse case. With proper consideration, geometry-based macro-tools are shown to provide helpful insight into pressure-loss/flow-rate relationships for NMP microvalves.

Publication Date

9-1-2002

Publication Title

Journal of Micromechanics and Microengineering

Volume

12

Issue

5

Number of Pages

662-669

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0960-1317/12/5/323

Socpus ID

0036735570 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0036735570

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