摘要
采用两相流混合模型,选取RNG k-ε湍流模型封闭两相流时均方程,对辐流式二次沉淀池液固两相流力学特性进行三维数值模拟。采用有限体积法求解微分方程;紊动能、紊流耗散均采用Quick离散格式;速度与压力耦合求解时使用了压力隐式算子分裂PISO(Pressure-Implicit with Splitting of Operators)算法。通过模拟获得了速度场、紊动能和污泥质量浓度等参量在空间的分布规律,对沉淀池的设计有一定的参考价值。
The two-phase mixture model was used to study the mechanical feature of solid-liquid two- phase turbulent flow in a secondary sedimentation tank of radial flow by 3-D numerical simulation . The improved RNG two-equation turbulent model was used to close the two-phase time-averaged equations. The finite volume method was used to solve the differential equations; the turbulence kinetic energy and the kinetic energy of turbulent dissipation took quick discrete format; the coupling velocity and pressure equations were solved with PISO algorithm （pressure-implicit with splitting of operators）. Through simula- tion, the paper obtained the distribution law of velocity field, turbulent kinetic energy , and quality con- centration of sludge in apace, which has certain reference value for the design of secondary sedimentation tank.
出处
《水资源与水工程学报》
2013年第4期25-27,共3页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(51178391)
陕西省西北旱区生态水利工程重点实验室开放基金(106-221223)
中央财政支持地方高校发展专项资金特色重点学科项目资助(106-00X101)
关键词
辐流式沉淀池
力学特性
三维模拟
液固两相流
sedimentation tank of radial flow
solid-liquid two-phase turbulent flow
mechanical proper-ty
3-D numerical simulation
two-phase turblent flow
