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在用毛细管法测定液体的粘滞系数的实验中,现有仪器为保证毛细管两端压强差恒定,一般都采用了一个恒压液槽,恒压液槽上有进液口和溢液口,因此需要液源和收集溢液的容器,给实验带来许多麻烦。我们利用虹吸原理,设计了一种测定液体粘滞系数的装置,该装置采用一漂浮支架 相似文献
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Recently,a report from Elite Readers suggested that a strange phenomenon of 'square-shaped waves' had occurred at the beaches of the Isle of Rhe in the Bay of Biscay.Based on the hydrological and geological data of the Bay of Biscay,we find that the special phenomenon is closely related to a solitary wave that can be described by the shallow water wave equation.We discuss the formation mechanisms of the square-shaped waves by the Kadomtsev-Petviashvili equation.The combination of exact solutions and actual condition provides the simulated initial state.We then reproduce a square-shaped structure by a numerical method and obtain the result consistent with the observed picture from media.Our work enriches public understanding of strange water waves and has great significance for tourism development and shipping transportation. 相似文献
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