Fluid dynamics on logarithmic lattices

نویسندگان

چکیده

Open problems in fluid dynamics, such as the existence of finite-time singularities (blowup), explanation intermittency developed turbulence, etc., are related to multi-scale structure and symmetries underlying equations motion. Significantly simplified motion, called toy-models, traditionally employed analysis complex systems. In models, modified preserving just a part believed be important. Here we propose different approach for constructing which instead simplifying one introduces configuration space: velocity fields defined on multi-dimensional logarithmic lattices with proper algebraic operations calculus. Then, motion retain their exact original form and, therefore, naturally maintain most scaling properties, invariants Classification models reveals fascinating relation renowned mathematical constants golden mean plastic number. Using both rigorous numerical analysis, describe various properties solutions these from basic concepts uniqueness blowup development turbulent dynamics. particular, observe strong robustness chaotic scenario three-dimensional incompressible Euler equations, well Fourier mode statistics turbulence resembling full Navier-Stokes system.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On internal fluid dynamics

Motivated by a range of applications (biomedical, industrial, engineering, environmental) this contribution is focussed on a mathematical study of (a) constriction/distortion and (b) branching in a vessel or network of vessels containing fluid flow. The central interest addressed is in medium-to-high Reynolds numbers where asymptotic approaches and matching yield much insight. The main reasonin...

متن کامل

Computational Fluid Dynamics on Hypercubes

We discuss some issues that arise in the implementation of numerical algorithms for computational fluid dynamics (CFD) on multiprocessor systems such as hypercubes. We identify several important kernel numerical algorithms from CFD that map well onto the hypercube architecture. We emphasize the importance of considering the optimal mapping for a collection of kernel algorithms used in an applic...

متن کامل

D-Brane Dynamics and Logarithmic Superconformal Algebras

We construct the consistent supersymmetric extensions of the operators describing the recoil of a D-brane and show that they realize an N = 1 logarithmic superconformal algebra. The corresponding supersymmetric vertex operator is related to the action of a twisted superparticle with twist field determined by the angular momentum of the recoiling D-brane and with explicitly broken κ-symmetry. We...

متن کامل

Logarithmic Sobolev Inequality for Zero–Range Dynamics

We prove that the logarithmic-Sobolev constant for Zero-Range Processes in a box of diameter L grows as L2.

متن کامل

Logarithmic growth dynamics in software networks

– In a recent paper, Krapivsky and Redner [1] proposed a new growing network model with new nodes being attached to a randomly selected node, as well to all ancestors of the target node. The model leads to a sparse graph with an average degree growing logarithmically with the system size. Here we present compeling evidence for software networks being the result of a similar class of growing dyn...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nonlinearity

سال: 2021

ISSN: ['0951-7715', '1361-6544']

DOI: https://doi.org/10.1088/1361-6544/abef73