Using Blender to create solids for Gerris
From Gerris
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| === How to create a wing === | === How to create a wing === | ||
| ==== Start with an empty scene (camera and light is OK) ==== | ==== Start with an empty scene (camera and light is OK) ==== | ||
| - | [[Image:blender_1_001.jpeg|thumb|frame|Start]] | + | [[Image:blender_1_001.jpeg|Start]] |
| ==== Add Bezier curve ==== | ==== Add Bezier curve ==== | ||
| Line 11: | Line 11: | ||
| </pre> | </pre> | ||
| - | [[Image:blender_1_002.jpeg|thumb]] | + | [[Image:blender_1_002.jpeg]] |
| ==== Close the curve ==== | ==== Close the curve ==== | ||
| Line 19: | Line 19: | ||
| </pre> | </pre> | ||
| - | [[Image:blender_1_003.jpeg|thumb]] | + | [[Image:blender_1_003.jpeg]] |
| ==== Subdivide it ==== | ==== Subdivide it ==== | ||
| Line 27: | Line 27: | ||
| </pre> | </pre> | ||
| - | [[Image:blender_1_004.jpeg|thumb]] | + | [[Image:blender_1_004.jpeg]] |
| ==== Disable the Back and Front for the curve ==== | ==== Disable the Back and Front for the curve ==== | ||
| Line 43: | Line 43: | ||
| (object) -> convert object type: Mesh | (object) -> convert object type: Mesh | ||
| - | [[Image:blender_1_005.jpeg|thumb]] | + | [[Image:blender_1_005.jpeg]] |
| - | [[Image:blender_1_006.jpeg|thumb]] | + | [[Image:blender_1_006.jpeg]] |
| ==== Close the top and bottom parts of the mesh ==== | ==== Close the top and bottom parts of the mesh ==== | ||
| Line 58: | Line 58: | ||
| (mesh) -> faces -> fill | (mesh) -> faces -> fill | ||
| - | [[Image:blender_1_007.jpeg|thumb]] | + | [[Image:blender_1_007.jpeg]] |
| <pre> | <pre> | ||
| Line 65: | Line 65: | ||
| </pre> | </pre> | ||
| - | [[Image:blender_1_008.jpeg|thumb]] | + | [[Image:blender_1_008.jpeg]] |
| ==== Recalculate normals ==== | ==== Recalculate normals ==== | ||
| Line 78: | Line 78: | ||
| (mesh) -> normals -> recalculate inside | (mesh) -> normals -> recalculate inside | ||
| - | [[Image:blender_1_009.jpeg|thumb|frame|The result]] | + | [[Image:blender_1_009.jpeg|frame|The result]] |
| ==== Export the mesh in STL format ==== | ==== Export the mesh in STL format ==== | ||
| Line 112: | Line 112: | ||
| [[media:blender_1.gts|gts]] | [[media:blender_1.gts|gts]] | ||
| - | [[Image:blender_1_simulation.jpeg|thumb|frame|The result]] | + | [[Image:blender_1_simulation.jpeg|frame|The result]] |
Revision as of 14:15, 14 March 2008
Using Blender to create solids for Gerris
This is a short introduction to using Blender for creation of solid bodies for inclusion in Gerris simulation.
How to create a wing
Start with an empty scene (camera and light is OK)
Add Bezier curve
<space> -> add -> curve -> bezier curve
Close the curve
<TAB> <C>
Subdivide it
(curve) -> segments -> subdivide
Disable the Back and Front for the curve
De-select "Back" and "Front" (this is done in bottom window in blender)
Extrude the curve
Set the extrude level to 1
Convert the curve to mesh
Switch to object mode - <TAB>.
(object) -> convert object type: Mesh
Close the top and bottom parts of the mesh
Switch to the side view
<Tab> <B> - border select (select the top nodes)
(mesh) -> faces -> fill
<A> <B> - border select (select the bottom nodes)
Recalculate normals
<A> <A>
Now you should have all mesh nodes selected.
(mesh) -> normals -> recalculate inside
The result
Export the mesh in STL format
<TAB> - go to object mode
Select the wing...
(File) -> Export -> STL
Save the file as wing.stl
STL to GTS
Convert from .stl to .gts
stl2gts < wing.stl > wing.gts
Transform the wing.gts
transform -o < wing.gts | transform -t 1 > blender_1.gts
The first transform normalizes the wing, the 2nd one moves it to 2nd cell along X axis. The resulting file "blender_1.gts" is ready for use in Gerris simulation.
Example simulation
The result
