Finite element modeling to study flow induced deformation of biofilm

Fluid flow past the biofilm surface can bring external force to biofilm which could result in biofilm deformation and detachment. The flow velocity have significant effect on determining biofilm deformation and detachment. In this work, finite element method was adapted to study the flow induced deformation of biofilm in varied flow conditions.     

机泵一体外转子潜油永磁同步电机设计与优化

设计机泵一体外转子潜油永磁同步电机，将螺杆泵整体嵌入电机内部，缩短系统长度，提高井下通过性。确定机泵一体采油系统方案，开展电机电磁及结构参数设计。针对电机，开展参数优化设计研究。基于传统田口法，提出田口迭代法，通过与遗传算法全局寻优结果对比，验证田口迭代法快速、准确的优化方法的合理性。对优化后的电机，开展有限元分析，计算其磁密、空载反电动势、转矩等性能，并进行了验证。