Datasets:

ppak10
/

FLOW-3D-Single-Track

configs:
  - config_name: temperature
    data_files:
      - split: train
        path: data/temperature/*.parquet
  - config_name: fraction_of_fluid
    data_files:
      - split: train
        path: data/fraction_of_fluid/*.parquet
  - config_name: liquid_label
    data_files:
      - split: train
        path: data/liquid_label/*.parquet
  - config_name: melt_region
    data_files:
      - split: train
        path: data/melt_region/*.parquet
  - config_name: pressure
    data_files:
      - split: train
        path: data/pressure/*.parquet
  - config_name: temperature_gradient
    data_files:
      - split: train
        path: data/temperature_gradient/*.parquet
  - config_name: velocity_magnitude
    data_files:
      - split: train
        path: data/velocity_magnitude/*.parquet
  - config_name: gradient_magnitude
    data_files:
      - split: train
        path: data/gradient_magnitude/*.parquet
  - config_name: vx_vy_vz
    data_files:
      - split: train
        path: data/vx_vy_vz/*.parquet
  - config_name: dtdx_dtdy_dtdz
    data_files:
      - split: train
        path: data/dtdx_dtdy_dtdz/*.parquet

FLOW-3D-Single-Track

This dataset consists of LPBF (Laser Powder Bed Fusion) melt pool simulations performed using FLOW-3D. Each row is one timestep from one simulation case, containing process parameters, mesh metadata, a per-timestep field volume, and image previews.

Dataset Configs

Load a specific field config:

from datasets import load_dataset

ds = load_dataset("ppak10/FLOW-3D-Single-Track", "temperature")

Available configs:

Config	Volume Shape	Description
`temperature`	`(50, 30, 30)`	Temperature field (K)
`fraction_of_fluid`	`(50, 30, 30)`	Fluid fraction (0–1)
`liquid_label`	`(50, 30, 30)`	Liquid region label
`melt_region`	`(50, 30, 30)`	Melt region mask
`pressure`	`(50, 30, 30)`	Pressure (dyne/cm²)
`temperature_gradient`	`(50, 30, 30)`	Raw Z temperature gradient
`velocity_magnitude`	`(50, 30, 30)`	Velocity magnitude (cm/s)
`gradient_magnitude`	`(50, 30, 30)`	\|∇T\| from components (K/cm)
`vx_vy_vz`	`(50, 30, 30, 3)`	Velocity vector components (cm/s)
`dtdx_dtdy_dtdz`	`(50, 30, 30, 3)`	Temperature gradient components (K/cm)

Volumes are padded to (50, 30, 30) along the Z axis. The nz column indicates how many Z layers contain real data; layers nz:50 are zero-padded (except temperature, which is padded with T_ambient = 299.15 K).

Row Schema

Column	Type	Description
`id`	string	Case identifier, e.g. `P100W_V0.30mps_A00deg`
`top_down_preview`	Image	Top-down 2D projection frame for this timestep
`volume_preview`	Image	3D volume render frame for this timestep
`timestep_index`	int32	0-based index within the simulation
`timestep_count`	int32	Total number of timesteps in this case
`timestep`	float64	Simulation time (seconds)
`power_w`	int32	Laser power (W)
`velocity_mmps`	float64	Scanning velocity (mm/s)
`angle_deg`	int32	Laser tilt angle (degrees)
`spot_radius_mm`	float64	Laser spot radius (mm)
`gauss_radius_mm`	float64	Laser Gaussian radius (mm)
`beam_x_mm`	float64	Beam X position at this timestep (mm)
`nx`	int32	Full mesh X cells
`ny`	int32	Full mesh Y cells
`nz`	int32	Actual Z cells (real data depth in padded volume)
`mesh_bound_x_mm`	float64	Full mesh X extent (mm)
`mesh_bound_y_mm`	float64	Full mesh Y extent (mm)
`mesh_bound_z_mm`	float64	Full mesh Z extent (mm)
`mesh_resolution_mm`	float64	Uniform cell size (mm)
`material_name`	string	Material name
`t_liquidus_k`	float64	Liquidus temperature (K)
`t_solidus_k`	float64	Solidus temperature (K)
`volume`	float32 array	Padded 3D field volume (see config for shape)

Simulation Coverage

62 cases, 120,113 total timesteps

Laser Power: 50, 100, 103, 150, 200, 250, 300, 350 W
Scanning Velocity: 0.3 – 2.4 m/s (19 values)
Laser Tilt Angle: 0°, 5°, 10°, 15°, 20°, 25°
Material: 316L Stainless Steel (T_solidus = 1674.15 K, T_liquidus = 1697.15 K)

Parameter Groups

Grid sweep (50–300 W × 0.3–2.4 m/s, 0° angle): 8 power levels × 8 velocity steps = 64 combinations (partial — high-power cases ongoing)

Angle sweep (350 W, 0.3 m/s): 6 tilt angles: 0°, 5°, 10°, 15°, 20°, 25°

ThermoPore parameters (103 W, 0° angle): 11 velocity values near the keyhole/conduction boundary (1.05–1.75 m/s)

Data Structure (on disk)

data/
├── temperature/
│   ├── P050W_V0.30mps_A00deg.parquet
│   ├── P100W_V0.30mps_A00deg.parquet   ← ~1999 rows, one per timestep
│   └── ...
├── fraction_of_fluid/
│   └── ...
└── ...

Technical Details

Simulator: FLOW-3D (CFD-based melt pool simulation)
Cell size: 20 µm (uniform, isotropic)
Crop window: 30 × 30 cells (0.6 mm × 0.6 mm) centered on beam, adaptive Z
Max Z depth: 50 cells (1.0 mm)
Physics: Gaussian/keyhole heat source, phase change, surface tension, evaporation pressure