tailieunhanh - Meshing User's Guide ANSYS phần 8

Phải đối mặt với nguồn không có thể là một phân tích khép kín như một hình xuyến, hình trụ hoặc hình cầu. Tuy nhiên, phân tích một phần là chấp nhận được là phải đối mặt với nguồn và mục hơn khu vực: khu vực lớn nhất sẽ được chọn làm nguồn | Specialized Meshing Note When Physics Preference is set to CFD and CutCell meshing is being used a shape checking algorithm based on orthogonal quality is used. Orthogonal quality which is the recommended quality criterion for CFD simulations can be used for all types of meshes including CutCell and polyhedral. Note that the skewness quality criterion is not recommended for CutCell meshes. Orthogonal quality in the Meshing application and ANSYS FLUENT is equivalent to orthoskew in TGrid except that the scale is reversed Orthoskew 1 - Orthogonal Quality The orthoskew values may not correspond exactly with the orthogonal quality values as the computation depends on boundary conditions on internal surfaces WALL vs. INTERIOR FAN RA-DIATOR POROUS-JUMP . In all cases the orthogonal quality value in ANSYS FLUENT should provide more accurate results than the value in the Meshing application. Also for CutCell meshes the elements in the Meshing application are traditional hex tet wedge pyramid elements while CutCell meshes that are exported from the Meshing application to ANSYS FLUENT are exported in polyhedral format. If you use the Meshing Options panel to change your Physics Preference from CFD to another preference the CutCell mesh method will be disabled. Activating the CutCell Mesh Method Now that prerequisites are set and you have access to the CutCellMeshing group you can activate the CutCell mesh method. Activating the method will expose the CutCell meshing controls and hide controls that are not applicable to CutCell 1. In the CutCellMeshing group of global controls in the Details View set Active p. 84 to Yes. After activating CutCell you will continue to have access to the following mesh controls with the noted exceptions and additions that are unique to CutCell. The unique controls are discussed in more detail in the appropriate workflow steps Most Advanced Size Function controls are supported. - Proximity Size Function Sources p. 64 control is applicable only to