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Investigation of bed shear stresses subject to external turbulence.

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Investigation of bed shear stresses subject to external turbulence.
นักวิจัย : Cheng, Nian-Sheng , Sumer, B. Mutlu. , Fredsøe, Jørgen.
คำค้น : DRNTU::Engineering::Civil engineering::Water resources.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2546
อ้างอิง : Cheng, N. S., Sumer, B. M., & Fredsøe, J. (2003). Investigation of bed shear stresses subject to external turbulence. International Journal of Heat and Fluid Flow, 24(6), 816-824. , 0142-727X , http://hdl.handle.net/10220/7643 , http://dx.doi.org/10.1016/S0142-727X(03)00088-2
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : International journal of heat and fluid flow
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The fluctuating bed shear stress has largely been investigated only for uniform channel flows and boundary layers. In practical engineering, the flow conditions are often modified due to the presence of various hydraulic structures. To what extent the modification affects the known characteristics of the bed shear stress is not clear. This study presents experimental results of the bed shear stress fluctuations, which are obviously subjected to external turbulence generated by superimposing artificial structures in the open channel flows. The statistical analysis of the measurements shows that the probability density function of the bed shear stress can be described by the lognormal function. Some associated relations concerning higher-order moments, skewness and kurtosis, which are derived from the lognormal function, are further compared with the experimental data. Physical implication of the skewed probability density distribution is finally discussed.

บรรณานุกรม :
Cheng, Nian-Sheng , Sumer, B. Mutlu. , Fredsøe, Jørgen. . (2546). Investigation of bed shear stresses subject to external turbulence..
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Cheng, Nian-Sheng , Sumer, B. Mutlu. , Fredsøe, Jørgen. . 2546. "Investigation of bed shear stresses subject to external turbulence.".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Cheng, Nian-Sheng , Sumer, B. Mutlu. , Fredsøe, Jørgen. . "Investigation of bed shear stresses subject to external turbulence.."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2546. Print.
Cheng, Nian-Sheng , Sumer, B. Mutlu. , Fredsøe, Jørgen. . Investigation of bed shear stresses subject to external turbulence.. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2546.