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Autori principali: Cheung, Hei Shing, Long, Qicheng, Lin, Zhiyue
Natura: Preprint
Pubblicazione: 2026
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Accesso online:https://arxiv.org/abs/2601.03397
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author Cheung, Hei Shing
Long, Qicheng
Lin, Zhiyue
author_facet Cheung, Hei Shing
Long, Qicheng
Lin, Zhiyue
contents We present PIVONet (Physically-Informed Variational ODE Neural Network), a unified framework that integrates Neural Ordinary Differential Equations (Neuro-ODEs) with Continuous Normalizing Flows (CNFs) for stochastic fluid simulation and visualization. First, we demonstrate that a physically informed model, parameterized by CNF parameters θ, can be trained offline to yield an efficient surrogate simulator for a specific fluid system, eliminating the need to simulate the full dynamics explicitly. Second, by introducing a variational model with parameters ϕ that captures latent stochasticity in observed fluid trajectories, we model the network output as a variational distribution and optimize a pathwise Evidence Lower Bound (ELBO), enabling stochastic ODE integration that captures turbulence and random fluctuations in fluid motion (advection-diffusion behaviors).
format Preprint
id arxiv_https___arxiv_org_abs_2601_03397
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle PIVONet: A Physically-Informed Variational Neuro ODE Model for Efficient Advection-Diffusion Fluid Simulation
Cheung, Hei Shing
Long, Qicheng
Lin, Zhiyue
Computational Engineering, Finance, and Science
Machine Learning
We present PIVONet (Physically-Informed Variational ODE Neural Network), a unified framework that integrates Neural Ordinary Differential Equations (Neuro-ODEs) with Continuous Normalizing Flows (CNFs) for stochastic fluid simulation and visualization. First, we demonstrate that a physically informed model, parameterized by CNF parameters θ, can be trained offline to yield an efficient surrogate simulator for a specific fluid system, eliminating the need to simulate the full dynamics explicitly. Second, by introducing a variational model with parameters ϕ that captures latent stochasticity in observed fluid trajectories, we model the network output as a variational distribution and optimize a pathwise Evidence Lower Bound (ELBO), enabling stochastic ODE integration that captures turbulence and random fluctuations in fluid motion (advection-diffusion behaviors).
title PIVONet: A Physically-Informed Variational Neuro ODE Model for Efficient Advection-Diffusion Fluid Simulation
topic Computational Engineering, Finance, and Science
Machine Learning
url https://arxiv.org/abs/2601.03397