Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T18: Fluids XI
11:30 AM–1:54 PM,
Thursday, March 9, 2023
Room: Room 210
Sponsoring
Unit:
DFD
Chair: Vishal Sankar Sivasankar, University of Maryland, College Park
Abstract: T18.00005 : Reversing the irreversible – super-resolution of noisy turbulent flow fields
12:18 PM–12:30 PM
Presenter:
Malgorzata J Zimon
(IBM Research – UK)
Authors:
Malgorzata J Zimon
(IBM Research – UK)
Mykhaylo Zayats
(IBM Research Europe)
Kyongmin Yeo
(IBM Research)
Levente Klein
(IBM Research)
Sergiy Zhuk
(IBM Research Europe)
In this talk, we present a physics informed data driven method which allows one to estimate the “true” state of the flow field from noisy observations, provided that the underlying field is described by Navier-Stokes equations. We discuss a theoretical convergence result for the case of noisy and incomplete measurements and validate it with the numerical simulation.
Furthermore, we propose to estimate high-resolution flow fields by projecting the original HR noisy observations onto a lower resolution grid. Such averaging is lossy and, therefore, without using a prior knowledge about the physical process, one cannot uniquely reconstruct the high dimensional information from its spatial averages. Although it is counterintuitive, we demonstrate that this approach produces the high-resolution ground truth estimates with lower error compared to using the original observations directly. Finally, we show that our algorithm follows a self-supervised paradigm and does not require the high-resolution data for training.
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