Loss characteristics and flow rectification property of diffuser valves for micropump applications

Wang, Yi Chun; Hsu, Jui Cheng; Kuo, Ping Chi; Lee, Yung-Chun

doi:10.1016/j.ijheatmasstransfer.2008.06.010

Cited by 64 publications

(53 citation statements)

References 33 publications

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“…Nevertheless, the design of diffusers for micropump applications is still short of a solid foundation due to lack of relevant experimental data and good analytical expressions for the pressure loss characteristics in low Reynolds number flow regime (Wang et al 2009). Recently, Nabavi (2009 have pointed out that parametric studies based on microdiffuser geometry (such as the effect of conical angle or slenderness ratio) and other flow conditions needs to be carried out experimentally or numerically.…”

Section: Introductionmentioning

confidence: 99%

Parametric characterization of piezoelectric valveless micropump

Verma

Chatterjee

2011

Microsyst Technol

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Experimental investigations are performed to determine the influence of electrical excitation and geometrical parameters on the performance of piezoelectric valveless micropumps fabricated on printed circuit board substrates. Strain gauges and shunt resistor are used in conjunction with a data acquisition system to form an effective transducer, capable of providing magnitude and phase response information pertaining to fluid-structure interaction. Effect of conical diffuser geometry on the displacement response and pressure flow characteristics are studied. With suitable variations in the design of the diffuser element and input excitation parameters, the ability of the valveless micropump can be extended to include forward, reversed and bidirectional flow features. The characteristic signatures of single and two peaks in flowrate or pressure data are captured in the displacement phase response. System identification approach is proposed to model and predict the performance of valveless micropumps.

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Section: Introductionmentioning

confidence: 99%

Parametric characterization of piezoelectric valveless micropump

Verma

Chatterjee

2011

Microsyst Technol

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“…2 is 0°. Since the entrance pressure loss coefficient is independent of the half angle [21], the entrance pressure loss coefficient of 0.5 and exit pressure loss coefficient of 1 are still regarded credible and to be used in the subsequent analysis.…”

Section: Pressure Loss Coefficient Of Diffuser/nozzlementioning

confidence: 99%

An Efficiency improved diffuser with extended sidewall for application in valveless micropump

Wang

McDaid

et al. 2015

Heat Mass Transfer

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“…Turning diffuser is often introduced in applications such as HVAC [1 -3], wind-tunnel [4 -6], gas turbine cycle [7] and aircraft engine [8,9] as an adapter to join the conduits of different cross-sectional areas or an ejector to decelerate the flow and raise the static pressure before discharging to the atmosphere. The performances of diffuser are measured primarily using outlet pressure recovery coefficient (Cp) and flow uniformity index (out) that are so much affected due to the nature of its geometry by the existence of flow separation and dispersion of core and secondary flow.…”

Section: Introductionmentioning

confidence: 99%

“…Study of the geometrical effect on diffuser performance has been of fundamental interest to researchers in the area of fluid mechanics since decades and it continues to grow [1][2][3][4][5][6][7][8][9][10][11][12]. Turning angle () is one of important geometrical parameters that is deemed to influence significantly the performance of turning diffuser.…”

Section: Introductionmentioning

confidence: 99%