文档介绍：Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005
Meshing Control using Sizing Functions and
Boundary Layers
6-1 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005
Sizing Functions and Boundary Layers
Sizing Functions and Boundary Layers are meshing control tools available in
GAMBIT.
Sizing functions can be used to smoothly control the growth in mesh size over
any particular region of the geometry or the entire geometry, starting from a
“source” or origin.
z Sizing functions are used to smoothly transition from fine mesh needed to resolve
flow physics, curved geometry and model flow in thin gaps.
Boundary layers are used to grow layers of cells of desired height from specified
boundaries of 2-D/3-D geometry and are typically used to capture near wall
phenomena such as turbulence and heat transfer.
Multiple Sizing Functions and Boundary Layers can be used to control mesh size
distribution.
6-2 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005
Size Functions
Size Functions control the mesh distribution in a region of space,
including edges, faces, and volumes similar to the way grading
controls mesh distribution on edges.
Size Functions are accessed through the Tools menu:
Size Functions are designed to grade meshes with Tets even
though they can be used with a hex mesh.
Multiple Size Functions: Curvature and Proximity
6-3 © Fluent Inc. 9/22/2006
Fluent User Services Center Introductory GAMBIT Training
GAMBIT February 2005
Size Function Types
Size Function requires the specification of
Type, Entities, and Parameters.
Size Function "Type" controls method by
which scope of sizing function is obeyed.
z Fixed
Scope is defined as a fixed region about a
source.
z Curvature
Scope is defined as a region near hig