Numerical simulation of sedimentation in pressurized deep tunnel of Donghu Lake
Based on the Godunov-type finite-volume method,a one-dimensional numerical model is developed to simulate hydrodynamics-solid transport-bed deformation in pressurized pipeline.This model is then employed to predict the sedimentation process in the deep tunnel of Donghu Lake and the hydraulic flushing effect after deposition is also investigated.It is found that sedimentation will not occur during long-term running under the current operating conditions.Nevertheless,when encountering extreme situations that result in solid concentration reaching a certain level,obvious sedimentation will occur along the pipeline.About 16～24 hours are needed to flush out the pre-deposits when the maximum deposition height in the pipeline reaches 30 cm.
pressurized pipelineerosion and deposition in pipelineHLLC solverdeep tunnelslot method
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