The effect of the microfluidic diodicity on the efficiency of valve-less rectification micropumps using Lattice Boltzmann Method
| Autor: | Zongqin Zhang, Manfred Krafczyk, S. Geller, Ahmed Fadl, Jonas Tölke, Donna M. Meyer |
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| Rok vydání: | 2009 |
| Předmět: |
Pressure drop
Materials science Nozzle Lattice Boltzmann methods Micropump Reynolds number Mechanics Condensed Matter Physics Electronic Optical and Magnetic Materials Diffuser (thermodynamics) symbols.namesake Hardware and Architecture Fluid dynamics symbols Electronic engineering Electrical and Electronic Engineering Microscale chemistry |
| Zdroj: | Microsystem Technologies. 15:1379-1387 |
| ISSN: | 1432-1858 0946-7076 |
| Popis: | The efficiency of the valve-less rectification micropump depends primarily on the microfluidic diodicity (the ratio of the backward pressure drop to the forward pressure drop). In this study, different rectifying structures, including the conventional structures (nozzle/diffuser and Tesla structures), were investigated at very low Reynolds numbers (between 0.2 and 60). The rectifying structures were characterized with respect to their design, and a numerical approach was illustrated to calculate the diodicity for the rectifying structures. In this study, the microfluidic diodicity was evaluated numerically for different rectifying structures including half circle, semicircle, heart, triangle, bifurcation, nozzle/diffuser, and Tesla structures. The Lattice Boltzmann Method (LBM) was utilized as a numerical method to simulate the fluid flow in the microscale. The results suggest that at very low Reynolds number flow, rectification and multifunction micropumping may be achievable by using a number of the presented structures. The results for the conventional structures agree with the reported results. |
| Databáze: | OpenAIRE |
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