Papers › From Zero to Turbulence: Generative Modeling for 3D Flow Simulation

From Zero to Turbulence: Generative Modeling for 3D Flow Simulation

29 May 2023arXiv:2306.01776archive 2025-07-28

Marten Lienen, David Lüdke, Jan Hansen-Palmus, Stephan Günnemann

Simulations of turbulent flows in 3D are one of the most expensive simulations in computational fluid dynamics (CFD). Many works have been written on surrogate models to replace numerical solvers for fluid flows with faster, learned, autoregressive models. However, the intricacies of turbulence in three dimensions necessitate training these models with very small time steps, while generating realistic flow states requires either long roll-outs with many steps and significant error accumulation or starting from a known, realistic flow state - something we aimed to avoid in the first place. Instead, we propose to approach turbulent flow simulation as a generative task directly learning the manifold of all possible turbulent flow states without relying on any initial flow state. For our experiments, we introduce a challenging 3D turbulence dataset of high-resolution flows and detailed vortex structures caused by various objects and derive two novel sample evaluation metrics for turbulent flows. On this dataset, we show that our generative model captures the distribution of turbulent flows caused by unseen objects and generates high-quality, realistic samples amenable for downstream applications without access to any initial state.

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GaussianDiffusion martenlienen/generative-turbulence/turbdiff/models/ddpm.py official repository ran MIT (permissive) · 6ae697d52bb7d328 · report
ModelPrediction martenlienen/generative-turbulence/turbdiff/models/ddpm.py official repository ran MIT (permissive) · 401db7131605c5fc · report
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normal_kl martenlienen/generative-turbulence/turbdiff/models/ddpm.py official repository ran · our draft was wrong fingerprinted MIT (permissive) · 52471728865056fc · report
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broadcast_right martenlienen/generative-turbulence/turbdiff/models/ddpm.py official repository unverified MIT (permissive) · b8cdcc9c16780e5d · report

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