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Mathematic Model of the Hydraulics Calculation of Spill Weir Dam

LI Jie(Department of Fundamental Courses,Beijing Institute of Fashion Technology,Beijing 100029,China)  
For the hydraulics calculation of spill weir dam,due to the difficulty to solve the group of partial differential equation,it was normally calculated by potential flow without stickiness.But in the real practice,liquid is sticky,the calculation results have a quite relatively difference with that in practice.In this paper,based on the discussion of the mathematic model of the flow over spill weir dam,under the condition of potential flow without considering the sticky,a new mathematic model was set-up by changing the boundary condition to consider the loss of energy in the real fluid flow.It made a numeral calculation of flow field to fit the real state.A numerical calculating answer in the example agreed well with experimental results.
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