A novel vortex mixer actuated by one-shot electricity-free pumps
| Autor: | Ping-Hei Chen, An-Shik Yang, Yi-Fan Hsieh, Li-Yu Tseng, Shao-Kai Liao, Long-Sheng Kuo |
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| Rok vydání: | 2013 |
| Předmět: |
Engineering
business.industry General Chemical Engineering Microfluidics Vortex mixer Laminar flow General Chemistry Mechanics Computational fluid dynamics Industrial and Manufacturing Engineering Physics::Fluid Dynamics Momentum Electronic engineering Compressibility Environmental Chemistry Transient (oscillation) business Mixing (physics) |
| Zdroj: | Chemical Engineering Journal. 228:882-888 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2013.05.053 |
| Popis: | Effective mixing is vitally important to many microfluidic devices in the areas of biotechnical industries, analytic chemistry and medical industries. However, most micro-mixers require complicated fabrication procedures, possibly inappropriate for practical microfluidic utilization. These mixers generally operate under low Reynolds-number conditions, causing a relatively long reaction time in various biochemical processes. This study presents a novel hemisphere-shaped vortex mixer to rapidly mix two liquids with simple geometric configuration. To simulate mixing behavior, computational analysis is based on the transient three-dimensional conservation equations of mass, momentum and species concentration. The test flow are treated as laminar, incompressible, miscible, uniform-property flows with insignificant gravity and temperature variation effects over the calculation domain. Considering the proposed mixer concurrently actuated by two finger-pressed pumps without electrical power, both experimental and simulation results show an intense swirling eddy generated in the core region of mixing chamber, achieving a mixing index up to 93% in a one-shot mixing event. |
| Databáze: | OpenAIRE |
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