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1、ICEMCFD/AI*Environment 5.0Hexa Workshop 3Sphere Cube ANSYSICEMCFD/AI*Environment 5.0WorkshopOpen ProjectOpen existing projectFile - Open Project Browse to SphereCube directorySelect File name icemcfd.prjGeometry file will automatically be loadedCalled by project fileCreate parts for surfacesSPHERE,
2、SYMMTurn off new parts SPHERE and SYMMPut remaining visible surfaces into CUBE Select only surfaces from Geometry selection bar (all other types toggled off) Type “v” for visible or select “visible objects” icon from selection barDelete Empty Parts and set Good ColorsSYMMSPHERE CUBENote: Not meshing
3、 inside cubeDate2ANSYSICEMCFD/AI*Environment 5.0WorkshopInitialize BlockingBegin BlockingBlocking - Create Block - Initialize BlocksChange Part to LIVEType = 3DSelect Entities Select “a” for all or “all entities” from Select geometry bar Initial block will encompass all entities (entire geometry)#2#
4、1#3Date3ANSYSICEMCFD/AI*Environment 5.0WorkshopBlock TopologyPlan block topologyThink “schematically”Create blocks in a manner that would best suit the geometryWould best suit mesh alignment e.g. align mesh with predicted flow directionResult in best mesh qualityConsider different optionsIn this cas
5、e a radial (half ogrid) topology would probably work bestBad internal angles at cornersDate4ANSYSICEMCFD/AI*Environment 5.0WorkshopCreate OgridCreate O-gridSelect Split Block Ogrid BlockSelect bottom face as shown Selecting the face will also select the adjacent blockSet Offset to 1 (default)Apply#2
6、#1#3Date5ANSYSICEMCFD/AI*Environment 5.0WorkshopRemove blocksDiscard center bottom blockSelect Delete BlocksUse 2 corner method Type “d” or select Select two corner vertices icon from Select blocks bar Select two diagonally opposing vertices as shown Any diagonal pair will do Easier than selecting i
7、con when several surrounding blocks are displayedApplyNote change in color of center block edges Cyan (internal) to white (boundary)12Date6ANSYSICEMCFD/AI*Environment 5.0WorkshopAssociate Blocking to GeometryAssociate center block vertices to corner points of cubeTurn on Points in Model tree Geometr
8、ySelect Associate Associate Vertex Point (default)Select one vertex first, middle mouse then select point you wish to associate to Vertex position will update automaticallyRepeat for all eight cornersNote change in color of vertices White (boundary constrained to surface) to red (fixed constrained t
9、o point)#2#1Date7ANSYSICEMCFD/AI*Environment 5.0WorkshopAssociate Blocking to GeometryAssociate edges to curvesTurn on Curves in Model tree GeometrySelect Association Associate Edge to CurveSelect right mouse key to exit select mode In order to select non-default optionsTurn on Project vertices opti
10、on Will automatically project vertices to curve Can move manually after association Can also move on to curve after association if option is turned offSelect Choose edges icon, then select outer bottom edges (4), middle mouse, then outer bottom circular curves (4) Multiply selected curves (more than
11、 one) will automatically be grouped#2#1Date8ANSYSICEMCFD/AI*Environment 5.0WorkshopMove VerticesMove vertices on to surfaceSelect Move Vertex Move VertexTurn off all Model tree Parts except SPHERE Toggle all off first, then toggle on SPHERE part Vertex movement will be constrained only to SPHERE sur
12、faces (only active part) Surfaces do not have to be displayed (but obviously helps if they are) try Full display option#2#1Select and move vertices onto SPHERE surface If surface is not in the same line of view (behind or in front) of the vertex, drag the cursor over until it “hits” the surface. You
13、 will not see the vertex move until the cursor is on the surface Otherwise, rotate the model (use F9 to toggle to dynamic mode/back to select mode) so surface is behind or in front of vertexDate9ANSYSICEMCFD/AI*Environment 5.0WorkshopMove VerticesMove vertices on to surfaceMove vertices so blocks ar
14、e as orthogonal as possible and block faces are as planar as possibleConstantly rotate the model! Blocks may seem okay in one view but skewed when viewed from a different directionCross-sectional view: Internal angle is too big move top vertex downwardRadial view: Face is non-planar move left vertex
15、 toward right (line up in radial direction)ExamplesDate10ANSYSICEMCFD/AI*Environment 5.0WorkshopCompute MeshSet mesh sizes on surfacesSelect Mesh Set Surface Mesh SizeType “P” for Part or select Select items in a part icon from selection barToggle on CUBE and SPHERE familiesSet Maximum element size
16、= 1; Height = 0.1; Height ratio = 1.2; ApplyRepeat for SYMM: Maximum element size = 1; Height/Height ratio = 0 (or blank)Display surfaces with Hexa Sizes #1Date11ANSYSICEMCFD/AI*Environment 5.0WorkshopCompute/View MeshCompute meshSelect Pre-Mesh Params Update Sizes Apply To calculate edge distributions from geome
