Abstract
The actions of bubbles in a piezoelectric valve-less nozzle/diffuser micropump, including entrance, movement, combination and separation in the pump chamber, are recorded by a high speed video camera. A piezoresistive micro pressure transducer is used to measure the pressure pulsations in the piezoelectric valve-less micropump chamber. Experimental results show that the effective bulk modulus of fluid and the amplitude of pressure pulsations in the valve-less micropump decrease significantly with the bubbles into the pump chamber. The entrance of bubbles can lead to performance deterioration and even complete failure of the micropump. However, the movement, combination and separation of bubbles have little effect on the effective bulk modulus of fluid and the dynamic characteristics of micropump.
| Original language | English |
|---|---|
| Pages (from-to) | 34-38+62 |
| Journal | Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics |
| Volume | 24 |
| Issue number | 3 |
| State | Published - Jun 2010 |
| Externally published | Yes |
Keywords
- Bubble
- High-speed video
- Pressure pulsation
- Valve-less micropump
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