pmukhop/rti-stratified-data

Stably Stratified RTI Evaluation Data

This repository contains the stably stratified Rayleigh-Taylor instability (RTI) data used in:

Emergent Transfer of a Physics Foundation Model from Simulation to Laboratory Turbulence
arXiv: 2606.01470

Files

• rti_stratified.h5: stably stratified RTI evaluation data in HDF5 format.

Intended use

This dataset is intended for reproducing or extending the zero-shot stable-stratification transfer experiment from the paper. In that experiment, a Walrus model finetuned only on unstratified RTI DNS is evaluated on a stably stratified buoyancy regime absent from finetuning.

Notes

Stable stratification changes the role of buoyancy: instead of driving indefinite mixing-layer growth, the background density gradient acts as a restoring force that suppresses vertical spreading and confines the mixing layer. The dataset is provided to support evaluation of whether models trained on unstratified RTI can respond correctly to this unseen physical regime.

Citation

If you use this dataset, please cite:

@misc{mukhopadhyay2026emergenttransferphysicsfoundation,
      title={Emergent Transfer of a Physics Foundation Model from Simulation to Laboratory Turbulence}, 
      author={Payel Mukhopadhyay and Stefan S. Nixon and Romain Watteaux and Michael McCabe and Alberto Bietti and Kyunghyun Cho and Cristiana Diaconu and Irina Espejo Morales and David Fouhey and Siavash Golkar and Tom Hehir and Shirley Ho and Jake Kovalic and Geraud Krawezik and Francois Lanusse and Tanya Marwah and Rudy Morel and Mariel Pettee and Helen Qu and Jeff Shen and Hadi Sotoudeh and Stuart B. Dalziel and Miles Cranmer},
      year={2026},
      eprint={2606.01470},
      archivePrefix={arXiv},
      primaryClass={physics.flu-dyn},
      url={https://arxiv.org/abs/2606.01470}, 
}