Statistical field theory for a passive vector model with spatially linear advection Article Swipe

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Lukas Bentkamp ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2511.13358

One challenge in developing a statistical field theory of turbulence is the analysis of the functional equations that govern the complete statistics of the flow field. Simplified models of turbulence may help to develop such a statistical framework. Here, we consider the advection and stretching of an incompressible passive vector field by a spatially linear stochastic field as a model for small-scale turbulence. The model encompasses non-Gaussian statistics due to an intermittent energy flux from large scales to small scales, thereby displaying hallmark features of turbulence. We explore this model using the Hopf functional formalism, which naturally leads to a decomposition of the complex non-Gaussian statistics into Gaussian sub-ensembles based on different realizations of the advecting field. We then characterize intermittency of the model using a numerical implementation, which takes advantage of this statistical decomposition.

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Type: preprint
Landing Page: http://arxiv.org/abs/2511.13358
PDF: https://arxiv.org/pdf/2511.13358
OA Status: green
OpenAlex ID: https://openalex.org/W4416649223

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DOI: https://doi.org/10.48550/arxiv.2511.13358

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Title: Statistical field theory for a passive vector model with spatially linear advection

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Type: preprint

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Publication year: 2025

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Publication date: 2025-11-17

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Authors: Lukas Bentkamp

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Landing page: https://arxiv.org/abs/2511.13358

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PDF URL: https://arxiv.org/pdf/2511.13358

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Cited by: 0

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