论文信息 - THREE-DIMENSIONAL FLOW AROUND BANDAL-LIKE STRUCTURES

THREE-DIMENSIONAL FLOW AROUND BANDAL-LIKE STRUCTURES

Using Bandal-like structure in a recurrent way is a promising method for the management of large alluvial rivers. Unfortunately, scientific knowledge on Bandal-like structures is still very poor despite of their historied applications in the Indian subcontinent. In this paper, the fundamental characteristics of the three-dimensional flow around Bandal-like structures are investigated with field survey, laboratory experiment and numerical simulation methods. The field survey was made with a velocity profiler in the Brahmaputra-Jamuna River in Bangladesh. The experiment was conducted under live-bed scour condition with a pair of simplified Bandal-like structures in the Ujigawa Open Laboratory, Kyoto University. A three-dimensional numerical model was developed and used to simulate the flow field under the same conditions as those of the laboratory experiment. It is found that the numerical results are reasonably consistent with those of the experimental measurements. Based on the analysis and comparison of the results from different research methods, the complex flow structure is clarified and characterized.

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