摘要
荷电多相湍流与一般多相湍流相比,存在流场脉动与电场脉动耦合的复杂运动特征,如何用方程加以描述并利用模型方程模拟这种耦合作用成为荷电多相湍流模拟研究的一项重要任务。在单相荷电流体湍流模型方程和荷电颗粒拟流体多相湍流描述方程建立的基础上,根据目前发展和应用不断扩大的“双流体”多相湍流模型,把荷电颗粒当作拟流体处理,借用拟流体多相湍流描述方程建立的方法,获得了荷电颗粒拟流体多相湍流模型,该模型方程通过电场关联项描述了电场和流场湍流脉动的耦合作用,通过引入电湍能交换系数对电场关联项加以模化,该模型可用于工程中大尺度复杂荷电多相湍流的模拟计算和工业装置的设计。
Compared with normal multiphase turbulent flow, charged multi-phase turbulent flow appears more complex due to the coupling between electric field and flow field. How to describe the coupling action with mathematic function and to model it are the main task in charged multi-phase turbulent flow. Based on the establishment of single-phase charged fluid turbulence model and charged particles pseudofluid multi-phase turbulence governing equations, a new simulation model was deduced with the double fluid modeling method regarding the charged particle phase as a fluid phase. In this model, the coupling action between turbulent flow field and electric field was described with electric conjunction term and this term will be modeled by using an electric-turbulence exchanging coefficient. This model could be applied in the accurate engineering simulation of big size complex
出处
《排灌机械》
2007年第1期54-57,共4页
Drainage and Irrigation Machinery
基金
国家发展与改革委员会项目[发改高技(2003)2140)]
江苏省高校自然科学基金资助项目(03KJD4300064)
关键词
荷电颗粒
拟流体
多相湍流
模型
流场
charged particles
pseudo-fluid
multi-phase charged multi-phase turbulent flow. turbulent flow
model
flow field
