| Summary: | 碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 99 === As technology advances, the development of micro-pumps are increasingly diverse, but the piezoelectric valve-less pump is still a problem of structural damage is not easy to replace. Although the research of valve-less micro thermal bubble pump has raised, but that did not have a lot of research and exploration guide. This study does some research about thermal bubble pump that change the pump size. The result is the flow rate is raised by changing pump size small to large, and get smaller pressure peak.
At this situation that only change the surface tension to 2σ, 4σ, and 6σ. The results showed that the surface tension at 2σ get lower flow rate then original, and the surface tension at 2σ, 4σ, and 6σ no change obviously. The variation of peak pressure has increased to the positive direction with increasing surface tension.
At this situation that only change the viscosity to 2μ and 4μ. The results showed that the viscosity at 2μ get lower flow rate then original, and the viscosity at 2μ and 4μ no change obviously. The variation of peak pressure has increased to the positive direction with increasing viscosity.
Simulate changes frequency with the same watt and change watt setting with the same frequency, find the best situation is to find a fixed value of the bubble to grow is the best state of contraction.
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