mesh generation using gmsh to simulate cavity flow · mesh generation using gmsh to simulate cavity...
TRANSCRIPT
Mesh Generation Using gmsh to simulate cavity flow
Albert S. Kim, Assoc. Prof.CEE, UHM
Adding Points
● Go to– Modules
– Geometry
– Elementary entities
– Add
– Point
● Numbers are arbitrary.
Coordinate input (1-4)
Coordinate input (5-8)
Adding Lines
● Go to– Modules
– Geometry
– Elementary entities
– Add
– Straight Line
Adding Surfaces
● Go to– Modules
– Geometry
– Elementary entities
– Add
– Plane Surface
Top
Press ‘e’ after you select 4 lines.
Bottom
Left & Right
Front & Back
Adding Volume
● Go to– Modules
– Geometry
– Elementary entities
– Add
– Volume
Adding .geo file
● Go to File → Save As
Adding Physical Surface
● Go to– Modules
– Geometry
– Physical groups
– Add
– Surface
top
bottom
left & right
front & back
Adding Physical Volume
● Go to– Modules
– Geometry
– Physical groups
– Add
– Volume
My cu be. ge o
My cu bes ym
.ge o
● Close gmsh program● Restart gmsh● Load
“mycubesym.geo”
● Go to– Mesh
– 3D
File → Save Mesh
Files generated are
● mycube.geo– Original file generated by gmsh
● mycubesym.geo– Edited file from mycube.geo to include surface
names such as top, bottom, left, right, front, and back.
● mycubesym.msh– Mesh file from mycubesym.geo.