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[](https://github.com/rbischof/windinet)
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[](https://rbischof.github.io/windinet_web/)
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**WinDiNet** repurposes a 2-billion-parameter video diffusion transformer ([LTX-Video](https://github.com/Lightricks/LTX-Video)) as a fast, differentiable surrogate for computational fluid dynamics (CFD) simulations of urban wind patterns. Fine-tuned on 10,000 CFD simulations across procedurally generated building layouts, it generates complete **112-frame wind field rollouts in under one second** — over 2,000x faster than
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- **Physics-informed VAE decoder**: Fine-tuned with incompressibility and wall boundary losses for physically consistent velocity field reconstruction
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- **Scalar conditioning**: Fourier-feature-encoded inlet speed and domain size replace text prompts, enabling precise physical parametrisation
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[](https://github.com/rbischof/windinet)
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[](https://rbischof.github.io/windinet_web/)
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**WinDiNet** repurposes a 2-billion-parameter video diffusion transformer ([LTX-Video](https://github.com/Lightricks/LTX-Video)) as a fast, differentiable surrogate for computational fluid dynamics (CFD) simulations of urban wind patterns. Fine-tuned on 10,000 CFD simulations across procedurally generated building layouts, it generates complete **112-frame wind field rollouts in under one second** — over 2,000x faster than the ground truth CFD solver.
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- **Physics-informed VAE decoder**: Fine-tuned with incompressibility and wall boundary losses for physically consistent velocity field reconstruction
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- **Scalar conditioning**: Fourier-feature-encoded inlet speed and domain size replace text prompts, enabling precise physical parametrisation
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