Efd详细技术介绍教案分析.ppt

EFD带来的优势 易学易用 强大的仿真能力 费时少，可直接调用CAD模型 可作为CAD设计的一部分进行 EFD 基于产品研发的虚拟仿真实验室 满足专业工程师的需求 即使没有专业学识或者数值分析知识背景也可以进行的流体流动与换热分析 EFD是唯一一款集成于产品研发过程中进行流动与换热分析的CFD工具，这是因为其具备七大关键技术，保证了EFD参与研发流程的：可行性、实用性、准确性、便利性。 Solution-adaptive mesh (example) EFD 方法 蒸气 作为真实气体，可以凝结 真实气体 (version 2008) 非牛顿流体 Herschel-Bulkley模型: K为流体的连续系数, n是流体的指数, ?是流体的场应力. power-law模型: μmin ≤ μ ≤ μmax Carreau模型: ?inf 是流体的无限剪切率动力黏度, ?0是流体的零剪切率动力黏度,, Kt 为时间常数, n power-law指数. 在两平行板间的牛顿流体与非牛顿流体的层流 多孔介质 Flows through sections with distributed drags (gauzes, porous screens and bodies, etc.)  EFD中的辐射 流动中的颗粒运动(磨损, 放射, 吸收) Thanks for your attention Batch Run Allows you to solve a set of projects in a prescribed order. You can include projects of any currently open document. For systems with multiprocessor capabilities, the Use processor(s) list allows you to specify the number of processors to be used in calculation. If an option implying multiple processors is selected, several tasks from the batch will be started on these processors simultaneously. Parametric study is a tool designed to perform a set of calculations varied only by a selected variable parameter (a particular model dimension or a boundary condition parameter) in order to find an analysis (i.e. a specific value of the dimension or parameter) where the selected flow parameter (defined as a goal) will be equal to the specified target value. The model configurations being different in only variable parameter (dimension or boundary condition parameter) yield different flow field, thus resulting in different goal values for each calculation. The obtained goal value is compared to the target parameter, which can be specified as a constant, table or function dependencies. If the difference between the calculated goal and the parameter is greater than the specified criterion, a new configuration is automatically created with the variable parameter value to be analyzed (the other project settings are maintained the same for every calculation