Numerical Simulation Of Ice Cover And Its Changes In Thickness

Ice is a common phenomenon in the rivers of cold regions. Rivers in these regions often form the ice cover, the ice jam or the ice dam in winter, and they will bring various ice disasters. Nowadays with the rapid development of the computer technology, the mathematic model is adopted more and more when it comes to study in ice-water two-phase flow. The mathematical model has become an important method when studying in the ice-water two-phase flow due to its characteristics of convenience, high effectiveness and low cost. The heat transmission theory, the method of Numerical Heat Transfer and the Solidification/Melting model in FLUENT are used to the thickness of ice ,the velocity of flow and the temperature and so on with the distinctness in velocity of intake and the water depth. The 3D and 2D numerical simulation are done. Simulation results show that in the 2D case. The thickness of the ice cover on the wall surface heat transfer is greater than the thickness of it on the air heat transfer form. The thickness of the ice cover on the wall surface heat transfer along the way changes slowly, but it on the air heat transfer along the way changes significantly. Reducing the entrance velocity, lowering the wall surface or air temperature, the formation of the thickness of the ice cover will increase; in the 3D circumstances, The thickness of the ice cover was relatively uniform in the import of the U-turn model, the ice cover was gradual accumulation in the convex bank when the stream traversed the import of the U-turn model, the thickness of the ice cover in the convex bank was significantly bigger than the thickness in the concave bank. The temperature field under the ice cover tends to be complex because of the existence of the secondary flows. The temperature in the convex bank is greater than it in the concave bank. Compared with the data from experiments, the laws in the numerical simulation are similar with them in the experiments...