期刊
EXPERIMENTS IN FLUIDS
卷 50, 期 5, 页码 1225-1233出版社
SPRINGER
DOI: 10.1007/s00348-010-0983-0
关键词
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资金
- Grant Agency of the Academy of Sciences of the Czech Republic [IAA200760705, AV0Z20760514]
- Grant Agency of the Czech Republic [101/07/1499]
- Yorkshire Water
- EPSRC
- ICT
- Engineering Research at Sheffield [EP/E01867X/1]
- EPSRC [EP/E01867X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E01867X/1] Funding Source: researchfish
Bistable diverter valves are useful for a large number of no-moving-part flow control applications, and there is a considerable interest in using them also in microfluidics, especially for handling small pressure-driven flows. However, with decreasing Reynolds number, the Coanda effect-on which the flow diverting effect depends-becomes less effective. Authors performed a study, involving flow visualisation, PIV experiments, measurements of the flow rates, and numerical flowfield computations, aimed at clarifying behaviour of a typical fluidic valve at low Reynolds numbers. A typical fluidic valve originally developed for high Re operation was demonstrated to be useful, though with progressively limited efficiency, down to surprisingly low Re values as small as Re = 800. Also observed was a previously not reported discontinuation in the otherwise monotonic decrease in performance at Re between 1,500 and 2,000.
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