悬浮生物载体空间结构的数值评价  

Numerical Evaluation of Spatial Structure of Suspended Bio-Carriers

作　　者：江帆[1] 陈维平[1] 李元元[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2008年第12期75-79,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省科技攻关项目(2005A30402001);金属新材料制备与成形广东省重点实验室开放基金项目(2007006)

摘　　要：为了评价及优化移动床生物膜反应器的重要材料——悬浮生物载体的空间结构,采用动网格模型与两相流模型耦合的动态数值模拟方法对装有悬浮生物载体的移动床反应器的内部流体力学特性进行分析.计算结果表明,动网格技术与两相流技术耦合的数值方法能够很详细地模拟悬浮生物载体在移动床生物反应器中的运动,以及其中每个瞬时的计算域内压力、速度、气含率等流体参数的定量分布.文中还讨论了采用气含率和载体表面剪切力两个流体力学参数来评价生物载体空间结构的可行性.Suspended bio-carriers are important functional materials for the moving-bed bio-film reactor. In order to evaluate and optimize the spatial structure of suspended bio-carriers, the internal fluid dynamic characteristics of the moving-bed bio-film reactor loaded with suspended bio-carriers are analyzed via the dynamic numerical simulation coupling the dynamic mesh model with the two-phase flow model. Calculated results show that the coupled simulation technology helps to describe in detail the movement of suspended bio-carriers in the moving-bed bio-film reactor, and to obtain the quantitative distributions of the flow parameters such as pressure, velocity and gas holdup at each moment. The feasibility of applying the gas holdup and surface shear stress to the evaluation of the spatial structure of suspended bio-carriers is finally discussed.

关 键 词：悬浮生物载体 空间结构 动态模拟 动网格 两相流 

分 类 号：X703.1[环境科学与工程—环境工程] TB34[一般工业技术—材料科学与工程]