نتایج جستجو برای: bed load

تعداد نتایج: 196071  

Journal: :Proceedings of the National Academy of Sciences 1979

Journal: :Proceedings of the Japan Society of Civil Engineers 1984

Journal: :Transactions, American Geophysical Union 1951

ژورنال: مهندسی دریا 2012
زنگانه, مرتضی, هوشنگی, حمید, کاظمی, احسان, یگانه بختیاری, عباس,

Bed-load transport is effective on river bed stability and Morphology. Therefore, modeling this phenomenon is very important in the field of hydraulics engineering. Bed-load transport occurs by saltation at low to medium shear stress and by sheet-flow at high shear stress. In the present paper, the hydrodynamics of transport in thesaltationand sheet-flow regimes under unidirectional flow is stu...

Journal: :PROCEEDINGS OF HYDRAULIC ENGINEERING 1992

Ahmad Mirzaei Mohammad Shahrokhi, Omid Vahidi

In present paper, dynamic behavior and control of a fluidized bed reactor for polyethylene production has been considered. A double active sites model for Ziegler-Natta catalysts is used for simulation of polymerization reaction. Hydrodynamic behavior of the bed is modeled using a two phase model including bubble and emulsion phases in which bubble phase has plug flow pattern with different...

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