Present study tries to put light on hydrodynamics of nanofluids in microchannels. For the present hydrodynamic study, the microchannels of hydraulic diameters of 212 and 301 μm are used. Present study also uses nanofluids in microchannel. To observe the hydrodynamic effect of nanofluids in microchannel, the alumina nanoparticles with sizes 45 nm are chosen with the water as base fluid. The nanofluids with the dilute concentrations 0.25 vol% are used to observe the effect of volume fraction. From the study of base fluid flow in microchannel, it is found that the axial pressure drop is linear thus showing the incompressible behaviour of fluid. For all microchannels, early transition to turbulence was observed. Also for the same Re the pressure drop was higher for smaller channel. However, the usage of nanofluids in these microchannels shows different behavior from normal fluids. The axial pressure drop was again linear thus proving that even though these fluids are different from normal fluids; they follow the behaviour of incompressible Newtonian fluids. Surprisingly, the friction factor was similar for these fluids as compared to base fluids. This can be attributed to dilute concentration of nanofluids, which make them a homogeneous fluid. It suggests that the use of dilute nanofluids in microchannel results in no or little penalty in pressure drop. It also suggests that if nanofluids have to be used as a better coolant, the hydrodynamics and heat transfer characteristics has to be studied as higher concentrations.
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ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
December 18–21, 2009
Shanghai, China
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-4389-5
PROCEEDINGS PAPER
Hydrodynamic Study of Nanofluids in Microchannel
Pawan K. Singh,
Pawan K. Singh
Indian Institute of Technology Madras, Chennai, TN, India
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T. Sundararajan,
T. Sundararajan
Indian Institute of Technology Madras, Chennai, TN, India
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Sarit K. Das
Sarit K. Das
Indian Institute of Technology Madras, Chennai, TN, India
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Pawan K. Singh
Indian Institute of Technology Madras, Chennai, TN, India
T. Sundararajan
Indian Institute of Technology Madras, Chennai, TN, India
Sarit K. Das
Indian Institute of Technology Madras, Chennai, TN, India
Paper No:
MNHMT2009-18180, pp. 467-473; 7 pages
Published Online:
October 26, 2010
Citation
Singh, PK, Sundararajan, T, & Das, SK. "Hydrodynamic Study of Nanofluids in Microchannel." Proceedings of the ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 1. Shanghai, China. December 18–21, 2009. pp. 467-473. ASME. https://doi.org/10.1115/MNHMT2009-18180
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