| 高含沙浑水静态剪切应力的试验研究 |
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| 引用本文： | 秦毅,曹如轩,郑学萍,陈杰. 高含沙浑水静态剪切应力的试验研究[J]. 水科学进展, 2008, 19(6): 863-867 |
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| 作者姓名： | 秦毅 曹如轩 郑学萍 陈杰 |
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| 作者单位： | 西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048;西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048;西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048;西安理工大学西北水资源与环境生态教育部重点实验室,陕西,西安,710048 |
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| 基金项目： | 陕西省教育厅重点实验室科研建设项目 |
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| 摘 要： | 以试验为手段对高含沙浑液的静态剪切应力进行了探讨,得出静态剪切应力比用压力式流变仪测出的动态剪切应力要大,其差值随着静态时间的增长而加大,且与含沙量成正比,与粒径成反比的定性结论。配合水槽概化试验,论述了静态剪切应力的存在使高含沙水流层流区的阻力随时间增长而加大;静态剪切应力的存在也是造成河道滩槽贴边淤积和滩地高含沙水流整体停滞的根源,是河槽形成"自然堤"的主要因素。
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| 关 键 词： | 高含沙浑水 静态剪切力 水流阻力 贴边淤积 |
| 收稿时间： | 2007-07-24 |
Experiment study on static yeild stress with hypoconcentration muddy water |
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| QIN Yi,CAO Ru-xuan,ZHENG Xue-ping,CHEN Jie. Experiment study on static yeild stress with hypoconcentration muddy water[J]. Advances in Water Science, 2008, 19(6): 863-867 |
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| Authors: | QIN Yi CAO Ru-xuan ZHENG Xue-ping CHEN Jie |
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| Affiliation: | Key Laboratory of North-West Water Resources and Ecology Environment of Education Ministry, Xi'an University of Technology, Xi'an 710048, China |
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| Abstract: | By the means of experiment this paper probes into the shear stress of the static muddy water. The experiment indicates that the value of the static yield stress is larger than that measured from pressure capillary rheometer and increases with the resting time and the sediment content and is negatively proportion to the particle size. It is learned from the water channel conceptualized experiment that the a static shear stress produces the resistance of the hypoconcentrated laminar flow change with time, and this stress is the root of the globule siltation resulting in the cease of the whole hypoconcentration muddy water flow near boundary of a channel and the root of natural barrier formtion. |
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| Keywords: | hypoconcentration muddy water the static yield stress the resistance of the flow the boundary siltation |
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