pyCFDutils

Python CFD post-processing utilities
Adrien Crovato, 2020

MATLAB utilities available here.

Features

pycfdutils can be used to:

• create sectional pressure data from field or surface solution files in Tecplot ASCII, VTK ASCII or VTK binary format
• compute the sectional aerodynamic loads
• save the pressure data and the loads to disk

Requirements

pycfdutils needs

• Python 3 interpreter and libraries
• numpy and vtk packages
• matplotlib package (optional)

Install and run

If you only want to use pyCFDutils, you can install it using

python3 -m pip install . [--user]

and then run a case using

python3 path/to/case.py

If you need to develop in pyCFDutils before using it, and you can directly run your case from the repo folder using

python3 run.py path/to/case.py

Documentation

The documentation is written in the classes/methods signature. The main features are listed here for convenience.

vtk_utils.Reader

• open(fname): read the file fname

vtk_utils.Cutter

• cut(cut_orig, cut_norm, tag_name=None, tag_id=None): create a cutplane defined by the point cut_orig and the normal cut_norm. If a tag name tag_name and number tag_id are provided, the slice is performed on the group defined by those parameters, otherwise the slice is performed on the grid directly.
• pts, elems, vals = extract(var_names, tag_dim, at_point=True, sort=True): returns the coordinates of the points (pts), the list of connectivity (elems) and the data (vals) named var_names contained in the current cutplane of dimension tag_dim. atPoint inidcates that the data are defined at the points (as opposed to: defined at the cells center). In the former case, sort can be used to sort the data against the list of connectivity.

cross_sections.CrossSections

• add_section(y, xz, cp): add data from a cutplane defined at y-coordinate y consisting of x and z-coordinates (xz) and pressure coefficient (cp).
• compute_loads(aoa=0): compute sectional aerodynamic load coefficients at angle of attack aoa degrees.
• display(): print the loads on console.
• plot(): plot the loads.
• write(): save the loads to disk.