Low-Rank Tensor Manifolds for Turbulent Field Reconstruction from Sparse Data
Abstract
Reconstructing turbulent flow fields from sparse and irregular measurements remains challenging because the underlying inverse problem is severely underdetermined. Here we present MANTRA, a manifold-based tensor framework that represents each velocity component in a continuous tensor-product space while constraining its coefficient tensor to a low-rank Tucker manifold. This structure provides a compact, data-adaptive representation without requiring gridded observations or governing equations. Riemannian optimization and adaptive selection of rank and basis complexity enable the model to exploit coordinate-wise spatiotemporal correlations. In simulations of forced isotropic turbulence and flow over a cylinder, MANTRA recovers multiscale structures at sampling densities orders of magnitude below the underlying grids and remains accurate under Gaussian noise up to 20% of the peak velocity. It also recovers leading coordinate-wise correlation structures from sparse observations. Applied to experimental particle-tracking velocimetry of an oscillating impinging jet, MANTRA reveals time-evolving structures that are not apparent from the scattered measurements alone.
Related
- High-fidelity Three-Dimensional Flow Field Reconstruction Driven by Turbulent Fluid Dynamics
- Physical-Field Reconstruction from Sparse Observations: When Are Diffusion Models Preferable to Deterministic Regression?
- Fourier-Feature-Embedded Complex-Valued Physics-Informed Convolutional Residual Networks for Sparse and Gappy Noisy Flow-Field Reconstruction
- Toward Principled Generative Data Assimilation of Turbulent Flows from Sparse Observations
- A priori Assessment of Tensor-Network Encoding for Isotropic Turbulent Flows
BibTeX
@misc{sakib2026lowrank,
title = {{Low-Rank Tensor Manifolds for Turbulent Field Reconstruction from Sparse Data}},
author = {Nazmus Sakib and Alexander G. Mychkovsky and Hessam Babaee},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.08411},
eprint = {2611.08411},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.08411},
}
RIS
TY - UNPB
TI - Low-Rank Tensor Manifolds for Turbulent Field Reconstruction from Sparse Data
AU - Nazmus Sakib
AU - Alexander G. Mychkovsky
AU - Hessam Babaee
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2611.08411
UR - https://arxiv.org/abs/2611.08411
AB - Reconstructing turbulent flow fields from sparse and irregular measurements remains challenging because the underlying inverse problem is severely underdetermined. Here we present MANTRA, a manifold-based tensor framework that represents each velocity component in a continuous tensor-product space while constraining its coefficient tensor to a low-rank Tucker manifold. This structure provides a compact, data-adaptive representation without requiring gridded observations or governing equations. Riemannian optimization and adaptive selection of rank and basis complexity enable the model to exploit coordinate-wise spatiotemporal correlations. In simulations of forced isotropic turbulence and flow over a cylinder, MANTRA recovers multiscale structures at sampling densities orders of magnitude below the underlying grids and remains accurate under Gaussian noise up to 20% of the peak velocity. It also recovers leading coordinate-wise correlation structures from sparse observations. Applied to experimental particle-tracking velocimetry of an oscillating impinging jet, MANTRA reveals time-evolving structures that are not apparent from the scattered measurements alone.
ER -