Merge Section Layout Data

Problem Description

Given a blade cross-section layout CSV and a directory of section files, merge all cross-sections into one visualization mesh so the full blade can be inspected in Gmsh, ParaView, or another mesh viewer.

Explanation of the Solution

import logging
import sgio

logging.basicConfig(level=logging.INFO)

sgio.merge_sections_from_csv(
    csv_file="blade.csv",
    section_dir="cs",
    input_format="gmsh",
    output_file="blade_merged.msh",
    output_format="gmsh22",
)

sgio.merge_sections_from_csv(...) reads the location and cs columns from blade.csv, resolves each section file under cs/, translates every section along the spanwise direction, normalizes the data to a visualization mesh, remaps Gmsh geometrical tags when needed, and writes a merged mesh file.

The default input format is vabs and the default output format is gmsh22. For the current example data the section inputs are already Gmsh meshes, so the call is:

sgio.merge_sections_from_csv(
    csv_file="blade.csv",
    section_dir="cs",
    input_format="gmsh",
    output_file="blade_merged.msh",
)

It can also read section inputs directly from other SG formats and convert them internally before merging, for example:

sgio.merge_sections_from_csv(
    csv_file="blade.csv",
    section_dir="sections",
    input_format="swiftcomp",
    model_type="bm1",
    output_file="blade_merged.msh",
)

Result

A merged mesh file blade_merged.msh is created. Open it with:

gmsh blade_merged.msh

or inspect it in ParaView.

File List

• run.py: Example script that calls the library API

• blade.csv: Blade cross-section layout file