Numerical modelling of supercritical flow in circular conduit bends using SPH method  

作　　者：Nikola M.Rosie Milena B.Kolarevie Ljubodrag M.Savie Dejana M.Doraevic Radomir S.Kapor 

机构地区：[1]Fuculty of Civil Engineering,University of Belgrade,Belgrade,Serbia, [2]Energoproiekt-Hidroinzenjering,Belgrade,Serbia

出　　处：《Journal of Hydrodynamics》2017年第2期344-352,共9页水动力学研究与进展B辑（英文版）

基　　金：financial support through projects TR 37009,TR 37010,granted by the Serbian Ministry of Education,Science and Technological Development

摘　　要：The capability of 1he smoothed-particle hydrodynamics （SPH） method to model supercritical flow in circular pipe bends is considered. The standard SPH method, which makes use of dynamic boundary particles （DBP）, is supplemented with the original algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for eslimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing can lead to correct presentation of the flow-type in a bend. Due to easiness of its implementation, the SPH method can he efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.The capability of 1he smoothed-particle hydrodynamics （SPH） method to model supercritical flow in circular pipe bends is considered. The standard SPH method, which makes use of dynamic boundary particles （DBP）, is supplemented with the original algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for eslimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing can lead to correct presentation of the flow-type in a bend. Due to easiness of its implementation, the SPH method can he efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.

关 键 词：Smoothed-particle hydrodynamics （SPH） super critical bend flow helical flow artificial viscosity 

分 类 号：TV[水利工程]