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The role of BKM-type theorems in 3D Euler, Navier-Stokes and Cahn-Hilliard-Navier-Stokes analysis

Gibbon, John D and Gupta, Anupam and Pal, Nairita and Pandit, Rahul (2018) The role of BKM-type theorems in 3D Euler, Navier-Stokes and Cahn-Hilliard-Navier-Stokes analysis. In: PHYSICA D-NONLINEAR PHENOMENA, 376 (SI). pp. 60-68.

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Official URL: https://dx.doi.org/ 10.1016/j.physd.2017.11.007

Abstract

The Beale-Kato-Majda theorem contains a single criterion that controls the behaviour of solutions of the 3D incompressible Euler equations. Versions of this theorem are discussed in terms of the regularity issues surrounding the 3D incompressible Euler and Navier-Stokes equations together with a phase-field model for the statistical mechanics of binary mixtures called the 3D Cahn-Hilliard-Navier-Stokes (CHNS) equations. A theorem of BKM-type is established for the CHNS equations for the full parameter range. Moreover, for this latter set, it is shown that there exists a Reynolds number and a bound on the energy dissipation rate that, remarkably, reproduces the Re-3/4 upper bound on the inverse Kolmogorov length normally associated with the Navier-Stokes equations alone. An alternative length-scale is introduced and discussed, together with a set of pseudo-spectral computations on a 128(3) grid. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belong to ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 30 Jul 2018 14:39
Last Modified: 30 Jul 2018 14:39
URI: http://eprints.iisc.ac.in/id/eprint/60319

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