A numerical study for boundary layer current and sheet flow transport induced by a skewed asymmetric wave

CHEN Xin; ZHANG Zichao; WANG Fujun

doi:10.1007/s13131-018-1267-4

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Article Navigation > Acta Oceanologica Sinica > 2018 > 37(9): 82-89

CHEN Xin, ZHANG Zichao, WANG Fujun. A numerical study for boundary layer current and sheet flow transport induced by a skewed asymmetric wave[J]. Acta Oceanologica Sinica, 2018, 37(9): 82-89. doi: 10.1007/s13131-018-1267-4

Citation:

CHEN Xin, ZHANG Zichao, WANG Fujun. A numerical study for boundary layer current and sheet flow transport induced by a skewed asymmetric wave[J]. Acta Oceanologica Sinica, 2018, 37(9): 82-89. doi: 10.1007/s13131-018-1267-4

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A numerical study for boundary layer current and sheet flow transport induced by a skewed asymmetric wave

doi: 10.1007/s13131-018-1267-4

1.
Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, China
2.
School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

Received Date: 2017-11-12

Abstract

Abstract

An analytical model with essential parameters given by a two-phase numerical model is utilized to study the net boundary layer current and sediment transport under skewed asymmetric oscillatory sheet flows. The analytical model is the first instantaneous type model that can consider phase-lag and asymmetric boundary layer development. The two-phase model supplies the essential phase-lead, instantaneous erosion depth and boundary layer development for the analytical model to enhance the understanding of velocity skewness and acceleration skewness in sediment flux and transport rate. The sediment transport difference between onshore and offshore stages caused by velocity skewness or acceleration skewness is shown to illustrate the determination of net sediment transport by the analytical model. In previous studies about sediment transport in skewed asymmetric sheet flows, the generation of net sediment transport is mainly concluded to the phase-lag effect. However, the phase-lag effect is shown important but not enough for the net sediment transport, while the skewed asymmetric boundary layer development generated net boundary layer current and mobile bed effect are key important in the transport process.
- analytical model,
- boundary layer current,
- sediment transport,
- sheet flow,
- skewed asymmetric wave

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References(26)

References

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