Personal Website:
+44 1865 615135
Address
University of Oxford
Andrew Wiles Building
Radcliffe Observatory Quarter
Woodstock Road
Oxford
OX2 6GG
Recent Publications:
The onset of turbulent rotating dynamos at the low magnetic Prandtl number limit
Journal of Fluid Mechanics
volume 822
page 822R31-822R310
(10 July 2017)
Triad interactions and the bidirectional turbulent cascade of magnetic helicity
Physical Review Fluids
issue 5
volume 2
page 054605-
(1 May 2017)
Spectral imbalance in the inertial range dynamics of decaying rotating turbulence.
Physical review. E
issue 2-1
volume 95
page 023114-023114
(24 February 2017)
Large-scale dynamics of magnetic helicity.
Physical review. E
issue 5-1
volume 94
page 053209-053209
(23 November 2016)
Forcing-dependent dynamics and emergence of helicity in rotating turbulence
Journal of Fluid Mechanics
volume 798
page 682-695
(8 June 2016)
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.
Teaching:
Lectures
I am currently teaching the Mathematics for Energy course for the DPhil students of the EPSRC CDT InFoMM.
Classes
I also do classes for undergraduates courses on Viscous Flows, Waves & Compressible Flows, Nonlinear Systems and Topics in Fluid 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
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)