| RESEARCH ON METHOD TO CALCULATE VELOCITIES OF SOLID PHASE AND LIQUID PHASE IN DEBRIS FLOW |
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| 作者姓名： | 陈洪凯 唐红梅 陈野鹰 |
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| 作者单位： | Institute of Geotechnical Engineering Chongqing Jiaotong University Chongqing 400074，P. R. China，Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering，Ministry of Education，Chongqing University，Chongqing 400044，P. R. China |
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| 基金项目： | Project supported by the Talent Fund of the Ministry of Communication of China（No.95050508）; the Fund of Western Communication of China（No.200332822047）; the Key Science Fund of the Ministry of Communication of China（No.95060233） |
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| 摘 要： | Velocities of solid phase and liquid phase in debris flow are one key problem to research on impact and abrasion mechanism of banks and control structures under action of debris flow. Debris flow was simplified as two-phase liquid composed of solid phase with the same diameter particles and liquid phase with the same mechanical features. Assume debris flow was one-dimension two-phase liquid moving to one direction, then general equations of velocities of solid phase and liquid phase were founded in two-phase theory. Methods to calculate average pressures, volume forces and surface forces of debris flow control volume were established. Specially, surface forces were ascertained using Bingham's rheology equation of liquid phase and Bagnold's testing results about interaction between particles of solid phase. Proportional coefficient of velocities between liquid phase and solid phase was put forward, meanwhile, divergent coefficient between theoretical velocity and real velocity of solid phase was provided too. To state succinctly before, method to calculate velocities of solid phase and liquid phase was obtained through solution to general equations. The method is suitable for both viscous debris flow and thin debris flow. Additionally, velocities every phase can be identified through analyzing deposits in-situ after occurring of debris flow. It is obvious from engineering case the result in the method is consistent to that in real-time field observation.
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| 关 键 词： | 计算速率 固相 液相 泥石流 双相流 |
| 收稿时间： | 2003-10-16 |
| 修稿时间： | 2005-10-31 |
Research on method to calculate velocities of solid phase and liquid phase in debris flow |
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| Hong-kai Chen,Hong-mei Tang,Ye-ing Chen.RESEARCH ON METHOD TO CALCULATE VELOCITIES OF SOLID PHASE AND LIQUID PHASE IN DEBRIS FLOW[J].Applied Mathematics and Mechanics(English Edition),2006,27(3):399-408. |
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| Authors: | Hong-kai Chen Hong-mei Tang Ye-ing Chen |
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| Institution: | 1. Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China
2. Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, P. R. China |
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| Abstract: | Velocities of solid phase and liquid phase in debris flow are one key problem to research on impact and abrasion mechanism of banks and control structures under action of debris flow. Debris flow was simplified as two-phase liquid composed of solid phase with the same diameter particles and liquid phase with the same mechanical features. Assume debris flow was one-dimension two-phase liquid moving to one direction, then general equations of velocities of solid phase and liquid phase were founded in two-phase theory. Methods to calculate average pressures, volume forces and surface forces of debris flow control volume were established. Specially, surface forces were ascertained using Bingham's rheology equation of liquid phase and Bagnold's testing results about interaction between particles of solid phase. Proportional coefficient of velocities between liquid phase and solid phase was put forward, meanwhile, divergent coefficient between theoretical velocity and real velocity of solid phase was provided too. To state succinctly before, method to calculate velocities of solid phase and liquid phase was obtained through solution to general equations. The method is suitable for both viscous debris flow and thin debris flow. Additionally, velocities every phase can be identified through analyzing deposits in-situ after occurring of debris flow. It is obvious from engineering case the result in the method is consistent to that in real-time field observation. |
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| Keywords: | debris now two-phase fluid velocities of solid phase and liquid phase calculation method verification |
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