sahni-lab/multi-res-rounded-wedge-cfd-database

Supersonic/hypersonic laminar flow of air over a rounded wedge body

Supersonic/hypersonic laminar flow of air over a rounded wedge body, solved with Ansys Fluent. Each sample is one set of freestream conditions (Mach number and altitude). For every sample the dataset provides the volume solution and the boundary-surface solution.

Contents

Samples	469 (metadata/samples.parquet)
Mesh	the same for every sample: 89,516 points, 44,320 hexahedra; 2D, one cell layer through the thickness (x, ±0.006 m)
Freestream	Mach 2.7–6.4, altitude 0.15–28.9 km

Layout

metadata/
  samples.parquet        one row per sample: freestream conditions, mesh size, file paths
  fields.json            field names, original solver names, units, descriptions
data/NNNN/
  volume.vtu             flow solution
  surface.vtm            boundary surfaces (multiblock), blocks in surface/<name>.vtu

All .vtu files are VTK XML unstructured grids (binary, zlib), readable with ParaView, VTK, pyvista or meshio. Fields are point data.

Samples (metadata/samples.parquet)

column	units	description
sample_id		four-digit ID, matches data/NNNN/
original_id		ID in the original run
T0	K	total temperature
P0	Pa	total pressure
Ts	K	static temperature
Ps	Pa	static pressure
M		freestream Mach number
altitude_km	km	altitude used for the static conditions
n_points, n_cells, cell_types		volume mesh size
volume_path, surface_path		paths of the sample's files in this repo

Solver setup

Ansys Fluent 2025 R2, density-based implicit solver, laminar, energy equation on, air as an ideal gas with constant properties (gamma, cp, R, viscosity and thermal conductivity are the same in every sample).

Fields

volume.vtu and surface/<block>.vtu: pressure, mach_number, velocity_magnitude, sound_speed, temperature, density, dynamic_pressure, enthalpy, gamma, gas_constant, heat_flux, internal_energy, specific_heat_cp, strain_rate_mag, lam_thermal_conductivity, total_energy, total_enthalpy, total_pressure, total_temperature, viscosity_lam, wall_shear, velocity (3). Units and descriptions are in metadata/fields.json. heat_flux and wall_shear are nonzero on the wall only.

Surface blocks: outlet, back, inlet, wedge, front.

Loading

import meshio, pandas as pd
from huggingface_hub import snapshot_download

root = snapshot_download("sahni-lab/multi-res-rounded-wedge-cfd-database", repo_type="dataset",
                         allow_patterns=["metadata/*", "data/0000/*"])
samples = pd.read_parquet(f"{root}/metadata/samples.parquet")
vol = meshio.read(f"{root}/data/0000/volume.vtu")
print(vol.point_data["mach_number"].shape)