Gambit-2.2-lect-02a-geometry.pdf

Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005

Creating Geometry in GAMBIT
2-1 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005

Preliminaries-1
‹ Objective:
z Create and mesh the fluid region for flow problems and solid
regions for heat transfer (and structural analysis for Fidap Users).
z Typically plished by constructing and working with lower
order entity objects and volume primitives.
‹ Terminology:
Lowest order entity z Vertex - a point
z Edge - a curve that is defined by at least 1 vertex (in the case of 1
vertex, the edge forms a loop)
z Face - a surface (not necessarily planar) bounded by at least 1 edge
(except for sphere and torus)
Highest order entity z Volume - a geometric solid (as in a solids model), also can be
thought of as an "air tight" set of bounding faces.
2-2 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005

Preliminaries-2
‹ Color Identification
z Color by Entity
„ Vertices and Edges are colored according to the highest order entity to
which they are connected.
„ The coloring scheme is:
ΠVertex (white)
ΠEdge (yellow)
ΠFace (light blue)
ΠVolume (green)
z Color by Connectivity
„ Vertices and Edges are colored according to the number of edges and
faces to which they are connected:
ΠWhite: Stand-alone vertex or edge
ΠOrange: Vertex connected to only one edge, or edge connected to
only one face (unconnected face)
ΠBlue: Vertex connected to exactly two edges, or edge connected to
exactly two faces (connected face)
ΠMagenta: Vertex connected to three or more edges, or edge
connected to three or more faces (internal face)
2-3 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005

Preliminaries-3
‹ Undo/Redo:
z 10 levels of undo by defaul