Laminar fully developed flow and pressure drop in linearly varying cross -section converging-diverging microtubes have been investigated in this work. These microtubes are formed from a series of converging-diverging modules. An analytical model is developed for frictional flow resistance assuming parabolic axial velocity profile in diverging and converging sections. Frictional flow resistance is found to be only a function of the geometrical parameters. To validate the model, a numerical study is carried out for the Reynolds number ranging from 0.01 to 100, for various taper angles and maximum-minimum radius ratios ranging from 0.5 to 1. Comparisons between the model and numerical results show that the proposed model predicts the axial velocity and the flow resistance accurately. As expected, the flow resistance is found to be effectively independent of the Reynolds number from numerical results. Parametric study shows that the effect of radius ratio is more significant than the taper angle. It is also observed that for small taper angles, flow resistance can be determined accurately by applying the local Poiseuille flow approximation.
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ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels
June 23–25, 2008
Darmstadt, Germany
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4834-5
PROCEEDINGS PAPER
Laminar Fully Developed Flow in Periodically Converging-Diverging Microtubes
M. Bahrami,
M. Bahrami
University of Victoria, Victoria, BC, Canada
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M. Akbari,
M. Akbari
University of Victoria, Victoria, BC, Canada
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D. Sinton
D. Sinton
University of Victoria, Victoria, BC, Canada
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M. Bahrami
University of Victoria, Victoria, BC, Canada
M. Akbari
University of Victoria, Victoria, BC, Canada
D. Sinton
University of Victoria, Victoria, BC, Canada
Paper No:
ICNMM2008-62187, pp. 181-188; 8 pages
Published Online:
June 11, 2009
Citation
Bahrami, M, Akbari, M, & Sinton, D. "Laminar Fully Developed Flow in Periodically Converging-Diverging Microtubes." Proceedings of the ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. Darmstadt, Germany. June 23–25, 2008. pp. 181-188. ASME. https://doi.org/10.1115/ICNMM2008-62187
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