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为探明程序中多孔介质模型求解重力坝坝基渗流场问题的准确性,采用基于有限体积法的Fluent数值模拟程序求解坝基渗流场,以半无限深简单地下轮廓线的二维稳定有压渗流场为例,不考虑多物理场耦合时,基于渗流理论,采用理论求解法计算渗流场各测点表征量的精确解,并与Fluent后处理程序输出的相应测点同一表征量的数值模拟结果进行了比较。结果表明,基于有限体积法的数值模拟结果与理论解相比误差在3%以内,可满足工程精度要求。
In order to prove the accuracy of the porous media model in solving the problem of seepage field in gravity dam foundation, Fluent numerical simulation program based on finite volume method was used to solve the seepage field of dam foundation. The semi-infinite deep simple two- As an example, when considering the coupling of multiphysics, based on the seepage theory, the exact solution of the characteristic quantities of the seepage points in the seepage field is calculated by the theoretical solution method. The numerical results of the same characterization of the corresponding measuring points output by the Fluent postprocessing program A The results show that the error of numerical simulation based on finite volume method is less than 3% compared with theoretical solution, which can meet the requirements of engineering accuracy.