Author(s): Liany A. Hendratta; Terunori Ohmoto; Shogo Nishi
Linked Author(s): Terunori Ohmoto
Keywords: Hyper-concentrated sediment laden flow; Non-Newtonian fluid; Open channel flow; PIV
Abstract: Concerning hyper-concentrated sediment-laden flow in an open channel, only a small number of studies have been conducted to obtain detailed measurement data on flow velocity changes because of the difficulty in measurement, and the influence of non-Newtonian fluid properties on resistance and the internal structure of flow remains poorly understood. We conducted an open channel experiment using a water solution of sodium polyacrylate (PSA), whose properties are close to those of a 30% (by volume) suspension of Yellow River sediment and a 10% (by volume) kaolin suspension, both of which are non-Newtonian fluids. This study has shown that non-Newtonian fluid properties can be expressed with a power-law model and shed light on the relationship between its parameters and sediment concentration by volume. The reproducibility of hyper-concentrated sediment-laden flow by use of a PSA solution as a simulant fluid has been evaluated from the viewpoint of the law of resistance. Finally, rheological mechanisms of hyper-concentrated sediment-laden flow were investigated by particle image velocimetry (PIV).
Year: 2014