Effect of two-sphere particles on flow field structure of flat plate boundary layer

DING Mingjie; DONG Lin; BAN Runze; FENG Kaibin

doi:10.12299/jsues.23-0139

Volume 37 Issue 3

Sep. 2023

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Article Navigation > Journal of Shanghai University of Engineering Science > 2023 > 37(3): 263-271

DING Mingjie, DONG Lin, BAN Runze, FENG Kaibin. Effect of two-sphere particles on flow field structure of flat plate boundary layer[J]. Journal of Shanghai University of Engineering Science, 2023, 37(3): 263-271. doi: 10.12299/jsues.23-0139

Citation:

DING Mingjie, DONG Lin, BAN Runze, FENG Kaibin. Effect of two-sphere particles on flow field structure of flat plate boundary layer[J]. Journal of Shanghai University of Engineering Science, 2023, 37(3): 263-271. doi: 10.12299/jsues.23-0139

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Effect of two-sphere particles on flow field structure of flat plate boundary layer

doi: 10.12299/jsues.23-0139

School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2023-06-08
Publish Date: 2023-09-30

Abstract

Abstract

To comprehend the flow structures surrounding particles within the boundary layer, particle image velocimetry (PIV) technique was employed to measure the flow field characteristics around particles of three distinct diameters and six different spacings within the Reynolds number range of 500 to 2000. The analysis results of the flow field characteristics reveal that with escalating fluid velocity and particle diameter, the vortex region behind the particles progressively intensified, exhibiting three distinctive modes: a singular vortex, mirror-symmetric vortices, and large-small oppositely rotating vortices. Among the observed experimental particles, the vortex region behind 10 mm particles displayed the most pronounced characteristics. However, upon reaching a certain threshold of particle spacing, the enhancement of the vortex region behind the particles ceased with further increases in spacing. These research findings serve as experimental evidence toward further elucidating the flow structures around particles within the boundary layer.
- boundary layer,
- particle image velocimetry (PIV),
- flow characteristics,
- vortex,
- particles

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References(14)

References

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