Author(s): Shiyan Zhang; Jennifer G. Duan
Linked Author(s): Shiyan Zhang, Jennifer G. Duan
Keywords: No Keywords
Abstract: One Dimensional (1D) numerical model using finite volume method (FVM) was developed for simulating the fluvial processes of dam break flow. The governing equation is the modified 1D shallow water equation that takes account of both bed-load and suspended load transport. The non-equilibrium sediment transport algorithm was adopted in the model. Van Rijn method was employed to calculate the bed-load transport rate and also the concentration of suspended sediment at the reference level. The flux term was discretised using the first and higher order upwind-biased schemes. The model was first tested under a fixed bed condition to evaluate the performance of different schemes and then applied to two experimental cases of dam break flow over a mobile bed. The simulated results generally agreed well with the measured data of the experiments. Results of different schemes are compared and discussed. The study shows the accuracy and applicability of various numerical methods in dam break flow simulation for mobile bed condition.
Year: 2009