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Computation of bed-load sediment flux based on Lagrangian and Eulerian quantities

عنوان مقاله: Computation of bed-load sediment flux based on Lagrangian and Eulerian quantities
شناسه ملی مقاله: IHC18_103
منتشر شده در هجدهمین کنفرانس هیدرولیک ایران در سال 1398
مشخصات نویسندگان مقاله:

Seyed Abbas Hosseini-Sadabadi - Dept. of Civil and Environmental Engineering, Amirkabir University of Technology No. ۴۲۴, Hafez Ave., Tehran, Iran
Alessio Radice - Dept. of Civil and Environmental Engineering, Politecnico di Milano, Piazza L. da Vinci ۳۲, ۲۰۱۳۳ Milan, Italy
Francesco Ballio - Dept. of Civil and Environmental Engineering, Politecnico di Milano, Piazza L. da Vinci ۳۲, ۲۰۱۳۳ Milan, Italy
Amir Reza Zarrati - Dept. of Civil and Environmental Engineering, Amirkabir University of Technology No. ۴۲۴, Hafez Ave., Tehran, Iran

خلاصه مقاله:
Bed-load fluxes were calculated for particle recording experiments carried out over a fixed-bed composed of two layers of glued particles and a range of shear velocity ratios from u*/u*c = 1.2 to u*/u*c = 1.8. Sediment fluxes were computed from a Lagrangian-Eulerian standpoint as proportional to entrainment rate and hop length, and from a purely Eulerian approach based on the multiplication of concentration of moving particles and their average Eulerian velocities. Results proved that if the experimental bias to the values of hop lengths is appropriately corrected, there is a perfect coincidence between the two methods, as the Lagrangian-Eulaerian and Eulerian sediment fluxes were identical for all the experimental conditions.

کلمات کلیدی:
Lagrangian, Eulerian, sediment flux, entrainment, hop length

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/998904/