卫生洁具形成虹吸现象的VOF模型判定方法

The Determinant Method of Ceramic Sanitary Ware Forming Siphon Phenomenon Based on VOF Model

利用标准k-ε湍流模型,闭合非定常气、液多相流的N-S方程,采用有限体积法和非结构化网格,数值模拟了虹吸式卫生洁具冲水流道的三维流动,由残余污水的测试实验验证了该数学模型的正确性。对排污管的驼峰顶断面的气、液两相的体积分数积分数进行了定量计算,获得了其虹吸现象形成的数值判据。对卫生洁具流道形成虹吸现象的水力特性实现了预测,为虹吸式卫生洁具的出水流道水力设计优化提供了理论依据。

With the finite volume method and unstructured grid,the standard turbulence model is adopted to close the unsteady N-S equations for the gas liquid multiphase flow using VOF model.The interior 3D flow field in a ceramic sanitary ware is numerically simulated.The computational model is validated using experimental data of remain sewage.Base on computational results of phase fraction on the surface of siphon crest in rising time,the numerical criterion of the siphon phenomenon forming can be obtained.The hydraulic characteristics of siphon phenomenon in the ceramic sanitary ware can be predicted.The presented model can be used for the optimization of the hydraulic design of ceramic sanitary wares.