Shu-Qing Yang

Prof. Dr. Shu-Qing Yang

orcid

Research Focus & Metrics

Academic Career Length

30Years (1997-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2018 in Desalination
Verified
Journal Article
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YZYing Zhang
Ying Zhang
MSMuttucumaru Sivakumar
Muttucumaru Sivakumar
SYShu-Qing Yang
Shu-Qing Yang
KEKeith Enever
Keith Enever
MRMohammad Ramezanianpour
Mohammad Ramezanianpour

1 December 2004 in Journal of Hydraulic Engineering
Verified
Journal Article
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SYShu-Qing Yang
Shu-Qing Yang
STSoon Keat Tan
Soon Keat Tan
SLSiow-Yong Lim
Siow-Yong Lim
This paper investigates the mechanism of the dip phenomenon whereby the location of the maximum velocity appears below the free surface vis-à-vis the secondary currents in open-channel flows. It is found that the classical log law gives a good description of the velocity distribution in the inner region if the local shear velocity is introduced into the dimensionless distance, i.e., u*(z)y/ν. In the outer region, where the maximum velocity occurs at some distance below the free surface in a vertical plane, it is found that the velocity deviation from the log law is linearly proportional to the logarithmic distance ln(1-y/h) from the free surface. To this end, the study proposes a dip-modified log law for the velocity distribution in smooth uniform open channel flows. This new law is capable of describing the dip phenomenon, and is applicable to the velocity profile in the region from the near bed to just below the free surface, and transversely, from the center line to the near-wall region of the channel....

1 March 2010 in Journal of Great Lakes Research
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Journal Article
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SYShu-Qing Yang
Shu-Qing Yang
PLPan-Wei Liu
Pan-Wei Liu

1 August 1997 in Journal of Hydraulic Engineering
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Journal Article
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SYShu-Qing Yang
Shu-Qing Yang
SLSiow-Yong Lim
Siow-Yong Lim
This paper presents an analytical approach for the partitioning of the flow cross-sectional area in steady and uniform three-dimensional channels. The mechanism and direction of energy transport from the main flow are analyzed first. Based on the availability of surplus energy from the main flow, a concept of energy transportation through a minimum relative distance toward a unit area on the wetted perimeter is proposed. This leads to a novel method to analytically divide the flow area into various parts corresponding to the channel shape and roughness composition of its wetted perimeter. The demarcated boundary or “division line” can be evaluated using a presented equation. The existence of the division lines, which are lines of zero Reynolds shear stress within the flow region, has been proven through comparison with turbulence characteristics measurements. The method is illustrated in a study of the shear stress distribution in smooth rectangular open channels. Analytical solutions, valid for all aspec...

11 December 2009 in Journal of Fluid Mechanics
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SYShu-Qing Yang
Shu-Qing Yang
GDG. Dou
G. Dou
Friction factor of drag-reducing flow with presence of polymers in a rough pipe has been investigated based on the eddy diffusivity model, which shows that the ratio of effective viscosity caused by polymers to kinematic viscosity of fluid should be proportional to the Reynolds number, i.e.u∗R/ν and the proportionality factor depends on polymer's type and concentration. A formula of flow resistance covering all regions from laminar, transitional and fully turbulent flows has been derived, and it is valid in hydraulically smooth, transitional and fully rough regimes. This new formula has been tested against Nikuradse and Virk's experimental data in both Newtonian and non-Newtonian fluid flows. The agreement between the measured and predicted friction factors is satisfactory, indicating that the addition of polymer into Newtonian fluid flow leads to the non-zero effective viscosity and it also thickens the viscous sublayer, subsequently the drag is reduced. The investigation shows that the effect of polymer also changes the velocity at the top of roughness elements. Both experimental data and theoretical predictions indicate that, if same polymer solution is used, the drag reduction (DR) in roughened pipes becomes smaller relative to smooth pipe flows at the same Reynolds number.

22 September 2005 in Water Resources Research
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Journal Article
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SYShu-Qing Yang
Shu-Qing Yang
STSoon Keat Tan
Soon Keat Tan
SLSiow‐Yong Lim
Siow‐Yong Lim