Laboratory investigation of dam-break flow of a mixture of water and granular matter
Some preliminary experimental results concerning the velocity of the snout of a debris flow originating from the instantaneous opening of a sluice-gate (dam-break) in a rectangular flume are presented. The measurements have been performed by varying the slope and roughness of the channel bed and the amount of cohesionless solid material (gravel) mixed with water stored in a tank above the sluice-gate at the beginning of the test. It has been observed that the bed roughness does not immediately affect the evolution of the debris flow and its effects are seen only after a certain time from the opening of the sluice-gate. This observation provides a way to evaluate the time scale of the resistance force in the debris flow. Moreover, sometimes the dam-break wave evolves into a fully developed flow, allowing a quantitative description of the steady motion of a debris flow.
debris flow dam-break granular flow
E. Larcan D. Berzi
Department of I.I.A.R., Politecnico di Milano, Milano, Italy
国际会议
成都
英文
223-228
2007-05-17（万方平台首次上网日期，不代表论文的发表时间）