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Optimal Design and Operation for a No-Moving-Parts-Valve (NMPV) Micro-Pump with a Diffuser Width of 500 μm.

Wang CT, Leu TS, Sun JM - Sensors (Basel) (2009)

Bottom Line: From prior analyses and experiments, it is found that piezoelectric films work better at a buzz driving frequency of f < 30Hz and the best operating frequency is at a driving frequency of f = 10Hz because it produces the largest net flow.In addition, the expansion angles θ(1) = 30° and θ(2) = 120° are the best expansion angles because they produce the largest net flow.These related results are very helpful for the actual design of no-moving-parts-valve micro-pump.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical and Electro-Mechanical Engineering, National I Lan University / 1, Sec. 1, Shen-Lung Road, I-Lan, 26047, Taiwan.

ABSTRACT
A no-moving-parts-valve (NMPV) with a diffuser width of D = 500 microns was investigated in this study by numerical simulations at Reynolds numbers, Re(D), ranging from 20 to 75, and expansion valve angles ranging from 30° < θ(1) < 57° and 110° < θ(2) < 120°. The D(p),(i) value, 1.02 < D(p),(i) < 1.14, is larger within the proposed range of the expansion valve angles. A flow channel structure with a depth of 500 micron is manufactured using yellow light lithography in this study. From prior analyses and experiments, it is found that piezoelectric films work better at a buzz driving frequency of f < 30Hz and the best operating frequency is at a driving frequency of f = 10Hz because it produces the largest net flow. In addition, the expansion angles θ(1) = 30° and θ(2) = 120° are the best expansion angles because they produce the largest net flow. These related results are very helpful for the actual design of no-moving-parts-valve micro-pump.

No MeSH data available.


Chart for the relationship between θ1, θ2 and Dp,i at ReD = 20.
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f4-sensors-09-03666: Chart for the relationship between θ1, θ2 and Dp,i at ReD = 20.

Mentions: First, D = 500 μm is fixed for the NMPV to investigate the relationship between different flow channel speeds and the angles of the expansion valve. From Figure 3, it is found that Dp,i exhibits a relatively irregular distribution at Reynolds number, ReD = 5. When it is increased to ReD = 20, it shows that there exists a larger Dp,i area on the contour line map from Figure 4. Similarly, there also exists a larger Dp,i area in the same direction at ReD = 50 and ReD = 75.


Optimal Design and Operation for a No-Moving-Parts-Valve (NMPV) Micro-Pump with a Diffuser Width of 500 μm.

Wang CT, Leu TS, Sun JM - Sensors (Basel) (2009)

Chart for the relationship between θ1, θ2 and Dp,i at ReD = 20.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3297122&req=5

f4-sensors-09-03666: Chart for the relationship between θ1, θ2 and Dp,i at ReD = 20.
Mentions: First, D = 500 μm is fixed for the NMPV to investigate the relationship between different flow channel speeds and the angles of the expansion valve. From Figure 3, it is found that Dp,i exhibits a relatively irregular distribution at Reynolds number, ReD = 5. When it is increased to ReD = 20, it shows that there exists a larger Dp,i area on the contour line map from Figure 4. Similarly, there also exists a larger Dp,i area in the same direction at ReD = 50 and ReD = 75.

Bottom Line: From prior analyses and experiments, it is found that piezoelectric films work better at a buzz driving frequency of f < 30Hz and the best operating frequency is at a driving frequency of f = 10Hz because it produces the largest net flow.In addition, the expansion angles θ(1) = 30° and θ(2) = 120° are the best expansion angles because they produce the largest net flow.These related results are very helpful for the actual design of no-moving-parts-valve micro-pump.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical and Electro-Mechanical Engineering, National I Lan University / 1, Sec. 1, Shen-Lung Road, I-Lan, 26047, Taiwan.

ABSTRACT
A no-moving-parts-valve (NMPV) with a diffuser width of D = 500 microns was investigated in this study by numerical simulations at Reynolds numbers, Re(D), ranging from 20 to 75, and expansion valve angles ranging from 30° < θ(1) < 57° and 110° < θ(2) < 120°. The D(p),(i) value, 1.02 < D(p),(i) < 1.14, is larger within the proposed range of the expansion valve angles. A flow channel structure with a depth of 500 micron is manufactured using yellow light lithography in this study. From prior analyses and experiments, it is found that piezoelectric films work better at a buzz driving frequency of f < 30Hz and the best operating frequency is at a driving frequency of f = 10Hz because it produces the largest net flow. In addition, the expansion angles θ(1) = 30° and θ(2) = 120° are the best expansion angles because they produce the largest net flow. These related results are very helpful for the actual design of no-moving-parts-valve micro-pump.

No MeSH data available.