Data

Full Database for Radiel Health's ML model inputs...

Data Avaliable Here...

1. Lid-Driven Cavity Flow (First Order Descritized) For Radiel's preliminary model to test on the age-old problem, from Re=100 to 3200 (just until it gets turbulent).
2. Lid-Driven Cavity Flow (Third Order Descritized) 2a. 1x1 Aspect Ratios 2b. 2x1 Aspect Ratios 2c. 1x2 Aspect Ratios 2d. 1.1x1 Aspect Ratio 2d. 1.2x1 Aspect Ratio 2d. 1.3x1 Aspect Ratio 2d. 1.4x1 Aspect Ratio 2d. 1.5x1 Aspect Ratio 2d. 1.6x1 Aspect Ratio 2d. 1.7x1 Aspect Ratio 2d. 1.8x1 Aspect Ratio 2d. 1.9x1 Aspect Ratio

Lid-Driven Cavity Flow CFD Simulation

2D laminar flow simulation of the classical lid-driven cavity benchmark problem using ANSYS Fluent 2025 R2.

Overview

This dataset contains comprehensive CFD simulation results for lid-driven cavity flow across a wide range of Reynolds numbers (Re = 100 to 3250). The simulations are validated against the benchmark data from Ghia et al. (1982).

Reynolds Numbers Simulated

• Range: Re = 100, 150, 200, ..., 3250 (65 cases total)
• Increment: ΔRe = 50
• Validated: Re = 100 and Re = 1000 (benchmarked against Ghia et al.)

Directory Structure

├── benchmark.py              # Validation script (compares against Ghia et al.)
├── visualization.py          # Plotting and visualization tools
├── summary_results.py        # Aggregate results analysis
├── run_batch.sh             # Batch simulation runner
├── centerline_fix.sh        # Script to fix centerline extraction
├── journal_template.jou     # Fluent journal file template
├── .gitignore               # Git ignore rules (excludes large binary files)
└── results/
    ├── Re100/               # Results for Re = 100
    ├── Re150/               # Results for Re = 150
    ├── ...
    └── Re3250/              # Results for Re = 3250

Data Files (per Reynolds number)

Each results/Re{number}/ folder contains:

Flow Field Data

• vertical_centerline_Re{Re}.csv - Velocity profile along vertical centerline (X=0.5)
• horizontal_centerline_Re{Re}.csv - Velocity profile along horizontal centerline (Y=0.5)
• moving_wall_full_Re{Re}.csv - Velocity and wall shear stress on moving lid
• stat_walls_full_Re{Re}.csv - Data on stationary walls (bottom, left, right)

Visualization

• centerline_profiles.png - U and V velocity profiles
• plot_velocity_magnitude.png - Velocity magnitude contour
• plot_velocity_vectors.png - Velocity vector field
• plot_pressure.png - Pressure contour
• plot_streamlines.png - Streamline visualization
• wall_shear_stress.png - WSS distribution on walls

Metadata

• metadata.txt - Simulation parameters and convergence info
• runtime.txt - Computational time

Benchmark Results (Re=100, Re=1000 only)

• benchmark_comparison_Re{Re}.png - Comparison plots vs. Ghia et al.

Simulation Parameters

• Geometry: Square cavity (1.0 m × 1.0 m)
• Actual mesh domain: X ∈ [0.3, 1.4] m, Y ∈ [0.0, 1.0] m
• Mesh: 16,641 quadrilateral cells (129×129 structured grid)
• Solver: ANSYS Fluent 2025 R2
• Model: 2D, laminar, steady-state
• Fluid: Water (ρ = 998.2 kg/m³, μ = 0.001003 kg/(m·s))
• Boundary Conditions:
  • Top wall: Moving lid (velocity varies with Re)
  • Bottom, left, right walls: No-slip stationary
• Discretization:
  • Pressure: Standard (12)
  • Momentum: Second-order upwind (1)
  • Pressure-velocity coupling: SIMPLE
• Convergence criteria: Residuals < 10⁻³ (solution deemed converged)

Validation

The simulations have been validated against the classical benchmark:

Ghia, U., Ghia, K. N., & Shin, C. T. (1982). High-Re solutions for incompressible flow using the Navier-Stokes equations and a multigrid method. Journal of Computational Physics, 48(3), 387-411.

Benchmark Results

Re	U Max Error	V Max Error	Status
100	TBD	TBD	✅
1000	TBD	TBD	✅

Note: Centerline data is currently being re-extracted at correct locations for accurate benchmark comparison.

Usage

Run Benchmark Comparison

python benchmark.py

Generate Visualizations

python visualization.py

Analyze Results

python summary_results.py

Data Format

All CSV files use space-delimited format with headers. Example columns:

Centerline files:

• x-coordinate, y-coordinate (m)
• x-velocity, y-velocity (m/s)
• velocity-magnitude (m/s)
• pressure (Pa)

Wall files:

• x-coordinate, y-coordinate (m)
• pressure (Pa)
• wall-shear (Pa) - magnitude
• x-wall-shear, y-wall-shear (Pa) - components

Notes

• Large binary files (.cas.h5, .dat.h5) are excluded via .gitignore
• Interior full flow field CSVs (interior_full_Re*.csv) are also excluded due to size
• For complete raw simulation data, contact the repository maintainer

Requirements

pip install pandas numpy matplotlib scipy

Contact

Rishabh Sharma r342shar@uwaterloo.ca (DaGravyGod)

Note for myself: must export PATH="$PATH:/C/Program Files/ANSYS Inc/v252/fluent/ntbin/win64" every time in bash terminal!