cubit-mesh-export 0.5.0

High-order curved mesh export from Coreform Cubit to NGSolve/Netgen

cubit-mesh-export

High-order curved mesh export from Coreform Cubit to NGSolve/Netgen.

Features

• Cubit plugin: radia_export netgen/gmsh/nastran/vtk APREPRO commands + Export Mesh GUI
• Arbitrary-order curving (order 1-5) via ACIS geometry projection
• Label preservation: material (block), boundary (sideset), edge (BBND)
• Companion JSON: CAD reference values for Volume/Area/Length consistency checking
• Standalone checker: verify mesh quality without Cubit (check-vol CLI)

Install

pip install cubit-mesh-export
cubit-plugin-install

The second command deploys the plugin binaries (.ccm, .ccl, .pyd) to your Coreform Cubit installation.

Upgrade

pip install --upgrade cubit-mesh-export
cubit-plugin-install

Always run cubit-plugin-install after upgrading to deploy the new binaries.

Usage

Cubit commands (recommended)

After installation, these commands are available in Cubit:

radia_export netgen "model.vol" order 3 overwrite     # NGSolve FEM (.vol)
radia_export gmsh "model.msh" order 2 version 2 overwrite  # GMSH v2.2
radia_export gmsh "model.msh" order 2 version 4 overwrite  # GMSH v4.1
radia_export nastran "model.bdf" order 2 overwrite    # Nastran BDF
radia_export vtk "model.vtk" order 2 overwrite              # VTK Legacy

Or use the Export Mesh menu in the Cubit GUI.

Python API (for scripting / verification)

import netgen       # must import before cubit
import ngsolve
import cubit

cubit.init(['cubit', '-nojournal', '-batch'])
cubit.cmd('open "model.cub5"')

from cubit_mesh_export import extract_curved_mesh
ng_mesh = extract_curved_mesh(cubit, order=3)
ng_mesh.Save("model.vol")

Check (does NOT require Cubit)

check-vol model.vol                         # basic check
check-vol model.vol --json model.vol.json   # compare vs CAD values

from cubit_mesh_export.check import check_consistency
results = check_consistency("model.vol")

Part of the Radia project

Source: github.com/ksugahar/Radia