湍流标量输运过程中的Schmidt数识别  

Identification for Schmidt number in scalar transport process of turbulent flows

作　　者：朱嵩[1] 刘国华[2] 程伟平[2] 黄跃飞[3] 

机构地区：[1]广东省电力设计研究院,广东广州510663 [2]浙江大学建筑工程学院,浙江杭州310058 [3]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水利水电科技进展》2011年第3期17-19,共3页Advances in Science and Technology of Water Resources

基　　金：国家重点基础研究发展计划(973计划)(2005CB724202);国家自然科学基金(50879075)

摘　　要：湍流Schmidt数是湍流传质过程中的关键控制参数,为了准确识别输运过程的湍流Schmidt数,提出基于Metropolis-Hastings算法和有限单元法的湍流Schmidt数识别算法。湍流求解采用稳态标准k-ε模型,浓度场求解采用非稳态无源对流扩散方程。算例计算结果表明,基于Metropolis-Hastings算法和有限单元法的参数识别算法对湍流Schmidt数的识别精度较高。Turbulent Schmidt number is a key control parameter in the mass transfer process of turbulence.In order to accurately identify the turbulent Schmidt number during the transportation,a method for identifying the turbulent Schmidt number based on the Metropolis-Hastings algorithm and the finite element methods was proposed.The steady standard k-ε model was employed to computate the tubulent fields,and the unsteady convection-diffusion equation without sources was adopted to solve the concentration fields.The computated results of a case indicates that the proposed method based on the Metropolis-Hastings algorithm and the finite element methods has high identificaiton precision for the tubulent Schmidt number.

关 键 词：湍流Schmidt数 Metropolis-Hastings算法 参数识别 标量输运 

分 类 号：O357.5[理学—流体力学]