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采用GAO-YONG湍流模式对二维管道内三角形钝体绕流问题以及槽道内后台阶分离流动进行了数值模拟.求解程序基于开源数值计算平台OpenFOAM(Open Field Operation and Manipulation),数值模拟结果很好地预测了钝体绕流问题中漩涡脱落的尾流的流动趋势以及后台阶流动中分离再附的流动结构,同时分析了速度分布以及摩擦系数等参数并与实验值进行了对比,结果符合很好.这表明GAO-YONG湍流模式对大分离流动有较好的预测能力,对工程实践具有指导性作用.
The GAO-YONG turbulence model is used to simulate the flow around the bluff bodies in the two-dimensional pipeline and the back flow in the channel. The program is based on the OpenFOAM (Open Field Operation and Manipulation) platform. The numerical results are good The flow tendency of the vortex shedding wake in the flow around the bluff body and the flow structure of separation and reattachment in the back flow are predicted. The parameters of velocity distribution and friction coefficient are also analyzed and compared with the experimental data. The results are in good agreement with the experimental data This shows that the GAO-YONG turbulence model has a good predictive ability for large separation flow and plays an instrumental role in engineering practice.