Hydrodynamic Computation Analysis of Main Channel and Flow Change in Baliase River Zularifin (a), Saleh Pallu (b), Mukhsan Putra Hatta (b)
a) Universitas Hasanuddin, Gowa, Jalan Poros Malino KM.6, Bontomarannu, 92171, Gowa Sulawesi Selatan.
b)Fakultas Teknik Universitas Hasanuddin, Gowa, Jalan Poros Malino KM.6, Bontomarannu, 92171, Gowa Sulawesi Selatan.
Abstract
This study aims to analyze the hydrodynamics of the Baliase Main Channel through the computational simulation of the Nays2DH - iRIC application and to determine changes in the Speed pattern, Froude number of the Baliase Trunk design review. The results showed that the computation simulation using the Nays2DH application was able to simulate the condition of the Baliase Kanan main channel both before the channel dimension change and after experiencing a channel change. By using the principle of hydrodynamics is able to show the flow pattern, flow velocity is clearly compared to using the principle of hydrostatics. The results that the flow velocity obtained from using hydrostatic principles were obtained before experiencing a change in dimensions (model A) v = 1.102 m / s, while the 2DH Nays simulation results obtained v = 0.94 - 1.2 m / s. Meanwhile, after experiencing a change in the channel dimensions (Model A) the flow velocity is v = 2.067 m / s, the simulation results of the Nasys-2DH computation flow velocity v = 2.1 - 2.6 m / s. Froude number produced by model A, Fr = 0.224 -0.236 and after experiencing a change in channel demise (model B), Fr = 0/45 to 0.7 (sub critical), which means that the channel^s cross-sectional depth is still able to handle the flow velocity that occurs.
