https://github.com/fandreuz/parametric-propeller-mesh
Parametrized generation of OpenFOAM configuration files and .obj files as a function of the propeller diameter.
https://github.com/fandreuz/parametric-propeller-mesh
Last synced: about 2 months ago
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Parametrized generation of OpenFOAM configuration files and .obj files as a function of the propeller diameter.
- Host: GitHub
- URL: https://github.com/fandreuz/parametric-propeller-mesh
- Owner: fandreuz
- Created: 2021-07-27T08:10:28.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2021-09-27T08:44:25.000Z (over 4 years ago)
- Last Synced: 2026-01-03T01:04:54.981Z (6 months ago)
- Language: Python
- Size: 814 KB
- Stars: 2
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# parametric-propeller-mesh
This package simplifies the configuration of an OpenFOAM mesh as a function of
the dimension of a propeller. It creates an arbitrary number of cylinders (in
`.obj` files)to define different regions of refinement, as well as the
configuration dictionaries for OpenFOAM tools (i.e. `snappy`).
## Results
The following image shows the result after the application of `snappy` with
4 cylinders with refinement values varying from 5 (innermost) to 3
(`cylinder2`).
## Installation and usage
Download the source code using the command
```
https://github.com/fAndreuzzi/parametric-propeller-mesh.git
```
Then navigate to the directory downloaded. To use the package use the following
command from your terminal:
```
python3 script.py your/OpenFOAM/case/directory your/propeller.obj
```
`your/OpenFOAM/case/directory` is the root directory of your OpenFOAM
experiment, the one which contains the directories `constant`, `system`, etc.
`your/propeller.obj` is an OBJ file which contain the 3D representation of
your propeller divided in two regions `propellerTip` and `propellerStem`. In
order to generate such an `.obj` file you may be interested in the method
`propeller.Propeller.generate_obj` from the package
[BladeX](https://github.com/fAndreuzzi/BladeX) (at the moment available only
in my fork of the project).
## Configuration
At the moment you need to modify the script in order to change the
configuration. We are going to switch to another method as soon as the
complexity increases.
+ `N_of_cylinders`: The number of cylinders used to define different regions
of resolution (every cylinder encloses one region);
+ `cylinder_scales`: A `N x 3` (where `N` is `N_of_cylinders`). Every column
is the dimension of the corresponding cylinder on that axis, in terms of
propeller diameters (`[2, 1, 2]` means that the cylinder is two diameters big
along X and Z, and one diameter big along Y);
+ `take_available_y`: The amount of Y available space that a cylinder can take
in the direction of the propellerTip. For details see the documentation of the
function `src.generate_cylinders.compute_cylinder_anchors`. Must contain
`N-1` items (where `N` is `N_of_cylinders`) since the outermost cylinder is
already anchored to the tail of `propellerStem`.
Important: cylinders appear always in increasing dimension. This means that
the first row of `cylinder_scales` represents the innermost cylinder, and the
last one the outermost. Cylinders must not overlap, intersect, or do other weird
things.