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Strongly Nonlinear Diffusion in Compressible Turbulent Flow. / Антонов, Николай Викторович; Гулицкий, Николай Михайлович; Какинь, Полина Игоревна; Бабакин, Андрей Александрович.
в: Physics of Particles and Nuclei, Том 56, № 6, 01.12.2025, стр. 1338-1342.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Strongly Nonlinear Diffusion in Compressible Turbulent Flow
AU - Антонов, Николай Викторович
AU - Гулицкий, Николай Михайлович
AU - Какинь, Полина Игоревна
AU - Бабакин, Андрей Александрович
PY - 2025/12/1
Y1 - 2025/12/1
N2 - In this paper we consider the model of turbulent diffusion of a passive scalar field in a compressible turbulent flow. The velocity field is modeled by the Kazantsev–Kraichnan “rapid-change” ensemble, while the scalar density field is described by a strongly nonlinear stochastic advection-diffusion equation. As a requirement of renormalizability, the model necessarily involves infinite number of coupling constants. Despite this fact, it is possible to use the renormalization group technique. Renormalization group equations reveal existence of two-dimensional surfaces of fixed points in the infinite-dimensional space of couplings. If some areas on these surfaces involve infrared attractive regions, the problem allows for the large-scale, long-time scaling behaviour. Critical dimensions of the fields and parameters and the spreading law for the particle’s cloud are derived for different scaling regimes.
AB - In this paper we consider the model of turbulent diffusion of a passive scalar field in a compressible turbulent flow. The velocity field is modeled by the Kazantsev–Kraichnan “rapid-change” ensemble, while the scalar density field is described by a strongly nonlinear stochastic advection-diffusion equation. As a requirement of renormalizability, the model necessarily involves infinite number of coupling constants. Despite this fact, it is possible to use the renormalization group technique. Renormalization group equations reveal existence of two-dimensional surfaces of fixed points in the infinite-dimensional space of couplings. If some areas on these surfaces involve infrared attractive regions, the problem allows for the large-scale, long-time scaling behaviour. Critical dimensions of the fields and parameters and the spreading law for the particle’s cloud are derived for different scaling regimes.
UR - https://www.mendeley.com/catalogue/7657a9f7-3d90-32d8-ac1d-496e7add44ac/
U2 - 10.1134/S1063779625700455
DO - 10.1134/S1063779625700455
M3 - Article
VL - 56
SP - 1338
EP - 1342
JO - Physics of Particles and Nuclei
JF - Physics of Particles and Nuclei
SN - 1063-7796
IS - 6
ER -
ID: 143068644