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	1. An analytical solution for long waves scattering around a circular island
	NIU Xiaojing
	Hydraulic Engineering 30 June 2014
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	Abstract:Based on the long wave equation, a new analytical solution is obtained for long waves propagating over a circular island mounted on a flat bottom. The profile of the island is idealized as a power function of the radial distance with arbitrary powers. The solution is found by using the separation of variables and the Frobenius method. A more straightforward way is applied to solve the ordinary differential equation derived from the long wave equation by separation of variables. The newly derived analytical solution is compared with the previous solution obtained by Jung et al.(2010). Excellent agreement is found between the two solutions for the same cases, while the present solution is superior to that of Jung et al.(2010) in the convergence of the series solution in most cases.
	TO cite this article:NIU Xiaojing. An analytical solution for long waves scattering around a circular island[OL].[30 June 2014] http://en.paper.edu.cn/en_releasepaper/content/4602969


	2. Analysis of Hydro-Mechanical Interaction to Pervious Pressure Tunnel
	SU Kai,Wu Hegao
	Hydraulic Engineering 10 February 2014
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	Abstract:Given internal water load as a kind of body load, an axisymmetric thick-walled cylinder model is built, in which the nonuniformity coefficients of reinforcement strain and concrete strain are introduced to compute the lining's equivalent permeability coefficient. The water-filled joint element model is developed to simulate the limited cooperation between reinforced concrete lining and surrounding rock. And an equivalent method is adopted to develop the computer program. The reinforcement stress and the surrounding rock stresses are calculated in pervious pressure tunnel with internal water exosmosis. The results show that the reinforcement stress obtained by the new method is near the observed data in the practice project. The fact that the reinforcement stress is at a lower stress level in the pervious pressure tunnel with high internal water load is verified.
	TO cite this article:SU Kai,Wu Hegao. Analysis of Hydro-Mechanical Interaction to Pervious Pressure Tunnel[OL].[10 February 2014] http://en.paper.edu.cn/en_releasepaper/content/4585034


	3. Relationships between Total Dissolved Gas and Dissolved Oxygen in Water
	MA Qian,LI Ran,FENG Jingjie,WANG Lele
	Hydraulic Engineering 25 June 2013
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	Abstract:Supersaturated dissolved gas can cause gas bubble disease in fish, potentially increasing their mortality. Previous studies have indicated that total dissolved gas (TDG) has a more serious impact on fish than other dissolved gases, such as dissolved oxygen (DO) or dissolved nitrogen. However, for many reasons, dissolved oxygen (DO) concentrations are generally used as a proxy for determining total dissolved gas (TDG) concentrations. Here, the relationships between TDG and DO concentrations are discussed relative to laboratory experiments and field TDG concentrations downstream of dam projects in China. The relationship between TDG and DO varied with time and space, and no clear or fixed relationship was observed between TDG and DO. Therefore, using DO concentrations to predict TDG supersaturation may result in large errors, and it is thus not appropriate to use DO concentrations as a predictor of TDG concentrations.
	TO cite this article:MA Qian,LI Ran,FENG Jingjie, et al. Relationships between Total Dissolved Gas and Dissolved Oxygen in Water[J].


	4. Research on Coanda effect of surface jet by Remold Stress Model
	FU Xiaoli
	Hydraulic Engineering 07 November 2012
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	Abstract:In this paper, Coanda effect is observed to attract the water to free surface. A surface jet attracts water from the surroundings and the phenomenon is called water entrainment, which is found to be resulting from one of the combined effects-Coanda effect. To capture these surface currents several turbulence model are used. In this paper, two isotropic and anisotropic turbulent models (standard k-ε, Realizable k-ε and RSM) are employed with different boundary conditions to compare with the experimental data. The simulated results indicated Realizable k- ε and standard are unable to capture streamwise vorticity and surface current. The RSM with proper boundary condition is proved to have good agreement with experimental data and to predict the Coanda effect best. The results showed that an anisotropic RANS model with the appropriate boundary conditions can give good results for the surface jets, at least for this simple geometry. It also can predict the Coanda effect more properly than the isotropic models.
	TO cite this article:FU Xiaoli. Research on Coanda effect of surface jet by Remold Stress Model[OL].[ 7 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4494487


	5. The Best Configuration Selection of Underwater Modular Self-Reconfigurable Robots

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