Numerical Investigation of a Crossflow Jet in a Rectangular Microchannel

Kok Cheong Wong

doi:10.4028/www.scientific.net/AMM.284-287.849

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 284-287Numerical Investigation of a Crossflow Jet in a...

Numerical Investigation of a Crossflow Jet in a Rectangular Microchannel

Abstract:

The present numerical study is conducted in three dimensional to investigate the crossflow of an external round jet and a horizontal stream of microchannel flow. The results of heat transfer performance for the cases with and without transverse jet are compared. The patterns of different crossflow jet were analyzed to understand the flow and heat transfer characteristics. The effect of jet nozzle position on the heat transfer is investigated. Generally, the heat transfer performance increases with the jet Reynolds number. However, some cases of weak jet are found to cause lower heat transfer rate relative to the case without external jet. When vertical weak jet encounter strong horizontal flow, the horizontal flow is dominant that the jet cannot reach the microchannel bottom wall but imposes resistance to the horizontal flow. The investigation on the jet nozzle location shows that the jet nozzle location closer to the channel inlet gives better heat transfer performance.

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Periodical:

Applied Mechanics and Materials (Volumes 284-287)

Pages:

849-853

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.284-287.849

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Online since:

January 2013

Authors:

Kok Cheong Wong

Keywords:

Crossflow, Jet, Jet Location, Rectangular Microchannel

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