tailieunhanh - ANSYS CFX-Mesh Tutorials phần 3

(Bạn có thể xem các thông báo lỗi bằng cách kích chuột phải vào đối tượng và chọn Hiển thị lỗi và cảnh báo.) Mục cần được tạo ra hoặc tái tạo ra (bởi vì thay đổi các thiết lập đã được thực hiện kể từ khi được tạo ra cuối cùng). | 26 Tutorial 2 Static Mixer Refined Mesh This example modifies the mesh and geometry for the static mixer example created in the previous example and assumes that you have access to the files created as part of that example. The following geometry and meshing features are illustrated modifying an existing mesh setup Inflation and geometry update. 1. Modifying the Mesh Generation Opening the Existing Project 1. Open ANSYS Workbench. 2. In the main part of the window click on the existing StaticMixer project. If it does not appear in the list of recent projects perhaps because you moved the files then use Browse to locate the project file instead. 3. T . . To open CFX-Mesh double-click on StaticMixer. CFX-Mesh will now be opened with the geometry and mesh settings from the previous tutorial. Modifying the Mesh Settings The first step is to create a refined mesh size over the whole geometry. 1. Click on Default Body Spacing in the Tree View which is contained in Mesh Spacing. 2. In the Details View change Maximum Spacing to m. This is a smaller length scale for the model than set previously m . CFX-Mesh Tutorials. . IP Inc. Tutorial 2 Static Mixer Refined Mesh 3. Press Enter on the keyboard to set this value. The next step is to create an Inflated Boundary on the walls of the mixer. Creating inflated boundaries generates prismatic elements from the surface by inflating triangular elements into the solid. As a result near the wall boundaries there will be layers of flat prismatic wedge-shaped elements which provide a smaller mesh length scale in the direction perpendicular to the wall. This provides better resolution of the velocity field near the wall where it changes rapidly. Inflation can greatly improve accuracy particularly in a model with a high aspect ratio such as a long narrow pipe or in a model where turbulence is significant. Inflation should always be used when you are interested in lift drag or pressure drop in the model. Away