基于VOF模型的二维溃坝水流数值模拟研究OA

Based on the Volume off Fluid(VOF)model,a two-dimensional dam break classic case is simulated,and the calculation accuracy of the VOF model is verified by comparing with the experimental values.For the case where there is an obstacle downstream of the two-dimensional dam break,the flow field changes at different times are studied,compared with the experimental results,and the pressure on the obstacle is analyzed.By changing the position of the obstacle,the influence of different obstacle positions on the dam break water flow and the pressure on different obstacle positions are studied.The results show that VOF can simulate the dam break water flow very well.For the dam break model with an obstacle downstream,the lowest point of the obstacle is subject to the greatest pressure,and the highest point is subject to the least pressure.The farther the obstacle is from the dam break water flow,the greater the pressure it is subject to,the more drastic the liquid level change,the higher the height of the water tongue formed by the dam break water flow hitting the obstacle,the splashing water body also increases accordingly,and the height of the water tongue hitting the right wall is greater.