---
license: cc-by-nc-4.0
tags:
- CFD
- Multiphase
- CompressibleFlow
- SciML
- Bubbles
- Shock
pretty_name: 2D Shock-Induced Air Bubble Collapse in Water
size_categories:
- 10K<n<100K
---

# 2D Shock-Induced Air Bubble Collapse in Water
## Description

The dataset captures the time-evolving behavior of 2D cylindrical air bubbles subjected to an external shock wave in water.
The interaction with the shock wave results in a collapse of the air bubble. 
Here we investigate a scenario with symmetric boundary conditions at the north and south walls.

<div style="display:flex;justify-content:center">
  <video style="width:100%;max-width:400px" src="https://huggingface.co/datasets/FluidVerse/2D_SABW_SSOO/resolve/main/2D_SABW_SSOO_Mach2.10.mp4" loop autoplay muted></video>
</div>

## About the data
|Metadata|Description|
|-----|------|
|Solver|[ALPACA](https://www.sciencedirect.com/science/article/abs/pii/S0010465521003581)|
|PDE|2D compressible Euler equations|
|Dimension|2D|
|Number of Trajectories|300|
|Train-Test-Split|0.8 - 0.2|
|Number of Timesteps|101|
|Simulation End Time|15 \\( \mu s \\)|
|Save Interval|0.15 \\( \mu s \\)|
|Fields| - density_mixed <br/> - density_water <br/> - density_air <br/> - pressure <br/> - velocityX <br/> - velocityY <br/> - volume_fraction_water|
|Simulation Resolution|2048x1024 (Clipped and Downsampled)|
|Dataset Resolution|512x512 & 256x256|
|Grid Type|Cartesian Uniform Grid|
|Initial Condition|The bubbles are in equilibrium with the surrounding pre-shock environment.|
|Boundary Conditions| North: Symmetry <br/> South: Symmetry <br/> East: Open <br/> West: Open|
|Conditioning Parameters| Shock Mach Number [1.3 - 2.1] <br/> Bubble Count [1 - 5] <br/> Bubble Radius [2mm - 3.5mm] <br/> Bubble Center Position [Random in Domain]

Further metadata information can be found in the corresponding `metadata.json` file.

## Key Challenges for Surrogate Modelling
- Accurate interface capturing
- Peak pressure in the domain
- Understanding wave dynamics
- Tracking bubble fragments

## How to Download the Dataset

Download the whole dataset:
```
hf download FluidVerse/2D_SABW_SSOO --repo-type dataset
```

Download only part of the dataset with resolution 256x256:
```
from huggingface_hub import snapshot_download

snapshot_download(
    repo_id="FluidVerse/2D_SABW_SSOO",
    repo_type="dataset",
    allow_patterns="multi_bubble/256x256/*",
    local_dir="."
)
```