RT - Journal Article T1 - Numerical Analysis of Separation and Stream tube Dimensions in the Intakes Installed to Rectangular and Trapezoidal Channels JF - JSTNAR YR - 2018 JO - JSTNAR VO - 21 IS - 4 UR - http://jstnar.iut.ac.ir/article-1-2908-en.html SP - 129 EP - 141 K1 - Flow pattern K1 - Fluent K1 - Rectangular and trapezoidal main channel K1 - Separation K1 - Stream tube. AB - The study of flow patterns in front of intake has been attracted the attention of researchers during the past decades to explore the mechanism of flow and sediment entry to the intake. In this study, the separation and stream tube dimensions were investigated in water intakes installed to rectangular and trapezoidal main channel. These researches were carried out with experimental and fluent models. The results of experimental and fluent models have a good conformity. It was found that, in trapezoidal main channel, the stream tube width decreases near the bed and increases near the surface and separation dimensions reduced and led to reduction of sediment entry and increase of efficiency LA eng UL http://jstnar.iut.ac.ir/article-1-2908-en.html M3 10.29252/jstnar.21.4.129 ER -