养 FLUENT Fluent User Services Center Introductory GAMBIT Training vww. fluentusers com GAMBIT 2.3 June 2006 Geometry Creation GAMbIT uses the acis geometry engine Provides tools for bottom-up geometry creation Vertex creation: From coordinates, grid snap, etc Edge creation Straight, vertex sweep/revolve, arc, ellipse, spline, etc Face creation Wireframe, edge sweep/revolve, etc Volume creation Wireframe face sweep/revolve face stitch etc Provides tools for top-down geometry creation by Face creation Rectangle, circle, ellipse, etc Volume creation: Brick, cylinder, sphere etc Boolean operation Unite, subtract, intersect Decomposition: Split Geometry creation typically involves use of all tools
2-16 Fluent User Services Center www.fluentusers.com © 2006 Fluent Inc. Introductory GAMBIT Training GAMBIT 2.3 June 2006 Geometry Creation ◆ GAMBIT uses the ACIS geometry engine. ◆ Provides tools for bottom-up geometry creation: ⚫ Vertex creation: From coordinates, grid snap, etc. ⚫ Edge creation : Straight, vertex sweep/revolve, arc, ellipse, spline, etc. ⚫ Face creation : Wireframe, edge sweep/revolve, etc. ⚫ Volume creation : Wireframe, face sweep/revolve, face stitch, etc. ◆ Provides tools for top-down geometry creation by: ⚫ Face creation: Rectangle, circle, ellipse, etc. ⚫ Volume creation: Brick, cylinder, sphere, etc. ⚫ Boolean operation: Unite, subtract, intersect ⚫ Decomposition: Split ◆ Geometry creation typically involves use of all tools
养 FLUENT Fluent User Services Center Introductory GAMBIT Training vww. fluentusers com GAMBIT 2.3 June 2006 Vertex Creation Commonly used vertex creation methods Create Real vertex I By coordinates(Cartesian, cylindrical, spherical) Coordinate sys Global Local On edge (if the intent is to split the edge, the edge split tool should be used instead) A At the intersection of two edges(resulting vertex is 2F not connected to either edge Label Vertex is not connected to either edge Ay」⊥ Reset_cose 回 At the centroid of an edge/face/volume c Project onto an edge Create Vertices At Edge Intersections Other vertex creation methods are presented in the Edge Appendix Edge 2 u Tolerance On face or volume Read coordinates from data file wy」_ Reset」 Close
2-17 Fluent User Services Center www.fluentusers.com © 2006 Fluent Inc. Introductory GAMBIT Training GAMBIT 2.3 June 2006 Vertex Creation ◆ Commonly used vertex creation methods: ⚫ By coordinates (Cartesian, cylindrical, spherical) ⚫ On edge (if the intent is to split the edge, the edge split tool should be used instead). ⚫ At the intersection of two edges (resulting vertex is not connected to either edge) ◼ Vertex is not connected to either edge ⚫ At the centroid of an edge/face/volume ⚫ Project onto an edge ◆ Other vertex creation methods are presented in the Appendix ⚫ On face or volume ⚫ Read coordinates from data file
器 FLUENT Fluent User Services Center Introductory GAMBIT Training vww. fluentusers com GAMBIT 2.3 June 2006 The Right Answer in CFD Edge Creation- Straight and Arcs Create Straight Edge Straight line Vertices Multiple edges can be created by selecting T ◆ Real y virtual multiple vertices Label Arc Reset aose Circle Three vertices on the arc/circle Or Create circular Arc Method: 4 Center and two endpoints or Vertices Radius and start/end angles(arc only) Center End- Points start Angle Pane Reset dose XY -18
2-18 Fluent User Services Center www.fluentusers.com © 2006 Fluent Inc. Introductory GAMBIT Training GAMBIT 2.3 June 2006 Edge Creation – Straight and Arcs ◆ Straight line ⚫ Multiple edges can be created by selecting multiple vertices. ◆ Arc ◆ Circle ⚫ Three vertices on the arc/circle OR ⚫ Center and two endpoints OR ⚫ Radius and start/end angles (arc only)
器 FLUENT Fluent User Services Center Introductory GAMBIT Training vww. fluentusers com GAMBIT 2.3 June 2006 The Right Answer in CFD Edge Creation- Vertex Sweep and Revolve Sweep Vertices Sweep vertex Vertices Path:Edge◆ Vector Select a vertex to sweep Choose edge or vector option Label v Revolve vertex Apply Reset Cose Revolve vertices Select one or more vertices to rotate 回 Specify angle of revolution Define the axis of revolution using the Axis vector definition form (0,0,0)->0,0,1) Input the Height for spiral creation Apply Reset Close 2-19
2-19 Fluent User Services Center www.fluentusers.com © 2006 Fluent Inc. Introductory GAMBIT Training GAMBIT 2.3 June 2006 Edge Creation – Vertex Sweep and Revolve ◆ Sweep vertex ⚫ Select a vertex to sweep. ⚫ Choose edge or vector option. ◆ Revolve vertex ⚫ Select one or more vertices to rotate ⚫ Specify angle of revolution ⚫ Define the axis of revolution using the vector definition form. ⚫ Input the Height for spiral creation
养 FLUENT Fluent User Services Center Introductory GAMBIT Training vww. fluentusers com GAMBIT 2.3 June 2006 Edge creation -other Tools Other edge creation tools are available Elliptical arc Conic arc Fillet arc +*+ Create edge from vertices(NURBS Project edge(s)onto a face Details on each of these tools can be found in the Appendix. 2006 Fluent Inc
2-20 Fluent User Services Center www.fluentusers.com © 2006 Fluent Inc. Introductory GAMBIT Training GAMBIT 2.3 June 2006 Edge Creation – Other Tools ◆ Other edge creation tools are available: ⚫ Elliptical arc ⚫ Conic arc ⚫ Fillet arc ⚫ Create edge from vertices (NURBS) ⚫ Project edge(s) onto a face ◆ Details on each of these tools can be found in the Appendix