Title :
Numerical Studies of Curved-walled Micro Nozzle/Diffuser
Author :
Chen, Yutang ; Hsu, Chinchun ; Chang, Mingcheng ; Kang, Shungwen
Author_Institution :
Dept. of Mech. Eng., De Lin Inst. of Technol., Taipei
Abstract :
In this study, commercially available software CFD was adopted for analyzing the performance of straight-walled and curved-walled micro nozzle/diffuser. Such nozzle/diffuser was used in valve-less micro-pumps. This model tested different types of nozzle/diffuser and the results showed that the pressure loss coefficient for nozzle/diffuser decreases with the increase of Reynolds number. At the same Reynolds number, the pressure loss coefficient for nozzle is higher than that of the diffuser. At a given volumetric flow rate, the pressure loss coefficient and ratio of pressure loss coefficient for curved-walled nozzle/diffuser are slightly higher than that of the straight-walled nozzle/diffuser. In this study, the numerical data was found good agreement with previous analytic solution and experimental results.
Keywords :
computational fluid dynamics; diffusion; flow; nozzles; CFD software; Reynolds number; curved-walled micro nozzle; diffuser; pressure loss coefficient; valve-less micro-pumps; Computational fluid dynamics; Differential equations; Fabrication; Micropumps; Performance analysis; Performance loss; Pumps; Software performance; Systems engineering and theory; Testing; Diffuser; Fluent; Nozzle; Pressure loss coefficient; Reynolds number;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2006. NEMS '06. 1st IEEE International Conference on
Conference_Location :
Zhuhai
Print_ISBN :
1-4244-0139-9
Electronic_ISBN :
1-4244-0140-2
DOI :
10.1109/NEMS.2006.334908
