Print Email Facebook Twitter Continuous representation for shell models of turbulence Part of: 15th EuropeanTurbulence Conference 2015 (ETC15)· list the conference papers Title Continuous representation for shell models of turbulence Author Mailybaev, A.A. Date 2015-08-25 Abstract In this work we construct and analyze continuous hydrodynamic models in one space dimension, which are induced by shell models of turbulence. After Fourier transformation, such continuous models split into an infinite number of uncoupled subsystems, which are all identical to the same shell model. The two shell models, which allow such a construction, are considered: the dyadic (Desnyansky--Novikov) model with the intershell ratio $\lambda = 2^{3/2}$ and the Sabra model of turbulence with $\lambda = \sqrt{2+\sqrt{5}} \approx 2.058$. The continuous models allow understanding various properties of shell model solutions and provide their interpretation in physical space. We show that the asymptotic solutions of the dyadic model with Kolmogorov scaling correspond to the shocks (discontinuities) for the induced continuous solutions in physical space, and the finite-time blowup together with its viscous regularization follow the scenario similar to the Burgers equation. For the Sabra model, we provide the physical space representation for blowup solutions and intermittent turbulent dynamics. To reference this document use: http://resolver.tudelft.nl/uuid:ae52afa9-9572-4813-83b2-1d3fe136525c Part of collection Conference proceedings Document type conference paper Rights (c) 2015 the Authors Files PDF 220.pdf 289.7 KB Close viewer /islandora/object/uuid:ae52afa9-9572-4813-83b2-1d3fe136525c/datastream/OBJ/view