Dr Vassilios Dallas

ORCID iD

Research groups

Oxford Centre for Industrial and Applied Mathematics

Address
Mathematical Institute
University of Oxford
Andrew Wiles Building
Radcliffe Observatory Quarter
Woodstock Road
Oxford
OX2 6GG

Recent publications

Bifurcations of a plane parallel flow with Kolmogorov forcing

Seshasayanan, K Dallas, V Fauve, S (26 Apr 2020) http://arxiv.org/abs/2004.12418v1

Classification of chaotic time series with deep learning

Boullé, N Dallas, V Nakatsukasa, Y Samaddar, D Physica D: Nonlinear Phenomena volume 403 (04 Dec 2019)

Transitions between turbulent states in a two-dimensional shear flow

Dallas, V Seshasayanan, K Fauve, S (02 Nov 2019) http://arxiv.org/abs/1911.00624v3

Rotationally induced coherence in turbulent kinematic dynamos

Dallas, V Tobias, S (07 May 2018) http://arxiv.org/abs/1805.02291v2

The onset of turbulent rotating dynamos at the low magnetic Prandtl number limit

Seshasayanan, K Dallas, V Alexakis, A Journal of Fluid Mechanics volume 822 822R31-822R310 (10 Jul 2017)

Teaching

Lectures

I am currently teaching the "Mathematics for Energy" course and the "Scientific Computing" course to the DPhil students of the EPSRC CDT InFoMM.

Classes

I also do the classes for the undergraduates courses on Viscous Flows, Waves & Compressible Flows, Topics in Fluid Mechanics, Nonlinear Systems and Classical Mechanics.

Prizes, awards, and scholarships

2015-2017 Newton International Fellowship, the Royal Society & the British Academy

2014 Visiting Research Fellowship, Campus France - Association DEPhy (France)

2012-2014 Marie Curie Intra-European Fellowship, FP7-PEOPLE-2011-IEF, Marie Curie Actions

2012-2014 Multi-year project access to Tier-0 resources, PRACE Multi-year Access at IBM Blue Gene/Q “JUQUEEN”

2006-2009 Doctoral Fellowship, Halliburton Energy Services - Imperial College London

2006 EUA4X Visiting Research Fellowship, Marie Curie Actions, Von Karman Institute for Fluid Dynamics

Research interests

Turbulence in fluids, MHD and polymer solutions
Geophysical and astrophysical dynamos, vortices and waves
Self-organisation and statistical mechanics in fluids
Bifurcations in flows with symmetries
Scientific computing

Further details

My group's research focus is on the non-linear, multi-scale and statistical dynamics of fluid dynamical systems with applications to geophysics, astrophysics, atmospheric sciences, energy and flow control.

Our approach to study these systems spans from theoretical methods to statistical analysis of large data sets from state-of-the-art numerical simulations that we perform on supercomputers.

Major / recent publications

K. Seshasayanan, V. Dallas, A. Alexakis, The onset of rotating turbulent dynamos at the low Pm limit, J. Fluid Mech. 822, R3 (2017)

M. Linkmann, V. Dallas, Triad interactions and the bidirectional turbulent cascade of magnetic helicity, Phys. Rev. Fluids 2, 054605 (2017)

V. Dallas, S. M. Tobias, Forcing-dependent dynamics and emergence of helicity in rotating turbulence, J. Fluid Mech. 798, 682-695 (2016)

V. Dallas, S. Fauve, A. Alexakis, Statistical equilbria of large scales in dissipative hydrodynamic turbulence, Phys. Rev. Lett. 88, 063017 (2015)

V. Dallas, A. Alexakis, Self-organisation and non-linear dynamics in driven magnetohydrodynamic turbulent flows, Phys. Fluids 27, 045105 (2015)

V. Dallas, A. Alexakis, The signature of initial conditions on magnetohydrodynamic turbulence, Astrophys. J. 788, L36 (2014)

V. Dallas, J. C. Vassilicos, G. F. Hewitt, Strong polymer-turbulence interactions in viscoelastic turbulent channel flow, Phys. Rev. E 82, 066303 (2010)