Rich Kerswell

	School of Mathematics University Walk Bristol University Bristol BS8 1TW, U.K.
	R.R.Kerswell@bris.ac.uk Tel: +44-117-928-7966 Fax: +44-117-928-7999

Research Interests

The Navier-Stokes equations (nonlinear dynamics, transition and turbulence)
Geophysical and astrophysical fluid mechanics (e.g. magnetic field generation,
convecting and stably-stratified flows, rapidly-rotating systems)
Granular media (dense transient flows)

Teaching:

Asymptotics ( official page, ans5, sheet6, ans6, sheet7, ans7, sheet8, ans8) & Numerical Methods for PDEs ( official page & extra info)

Meetings

IUTAM Symposium `Non-Uniqueness of Solutions to the Navier-Stokes Equations and their Connection with Laminar-Turbulent Transition'
August 9-11, 2004, Bristol with Proceedings.
BAMC 2007, April 17- 19, 2007, Bristol.
Isaac Newton Programme `The Nature of High Reynolds Turbulence' 26 August -19 December 2008, Cambridge.
International Centre for Mathematical Sciences (ICMS) `Analysis of Fluid Stability' 25 June - 3 July 2009, Edinburgh.
Woods Hole Oceanographic Institution GFD summer school: `Shear Turbulence: Onset and Structure' 20 June - 26 August 2011, Woods Hole, Massachusetts.
( Principal lectures: 1. Transition scenarios; 2. Edge tracking; 3. Triggering turbulence efficiently; 4. Turbulence: transient or sustained? ).
The 14th European Turbulence Conference (ETC14) 1-4 September 2013, ENS Lyon.

Papers:

Archive:
Kerswell, R.R. ``The instability of precessing flow'' Geophys. Astrophys. Fluid Dynam. 72, 107-144, 1993.
Kerswell, R.R. ``Tidal excitation of hydromagnetic waves and their damping in the Earth'' J. Fluid Mech. 274, 219-241, 1994.
Kerswell, R.R. ``Upper bounds on general dissipation functionals in turbulent shear flows: revisiting the `efficiency' functional'' J. Fluid Mech. 461, 239-275, 2002.
Wedin, H. & Kerswell, R.R. ``Exact coherent structures in pipe flow: travelling wave solutions'' (colour version) J. Fluid Mech. 508, 333-371, 2004.
Kerswell, R.R. & Tutty, O.R. ``Recurrence of travelling waves in transitional pipe flow'' (colour version) J. Fluid Mech. 584, 69-102, 2007.
Pringle, C.C.T., Duguet, Y. & Kerswell, R.R. ``Highly symmetric travelling waves in pipe flow''(colour version) Phil. Trans. Roy. Soc. A 367, 457-472, 2009 (TW videos).

Recent:
Pringle, C.C.T. & Kerswell, R.R. ``Using nonlinear transient growth to construct the minimal seed for shear flow turbulence'' Phys. Rev. Lett. 105, 154502, 2010.
Duguet, Y., Willis, A.P. & Kerswell, R.R. ``Slug genesis in cylindrical pipe flow'' J. Fluid Mech. 663, 180-208, 2010 (JFM cover).
Kerswell, R.R. ``Exchange flow of two immiscible fluids and the principle of maximum flux'' J. Fluid Mech. 682, 132-159, 2011.
Pringle, C.C.T., Willis, A.P. & Kerswell, R.R. ``Minimal seeds for shear flow turbulence: using nonlinear transient growth to touch the edge of chaos'' J. Fluid Mech. 702, 415-443, 2012.
Li, L., Patterson, M.D., Zhang, K. & Kerswell, R.R. ``Spin-up and spin-down in a half cone: A pathological situation or not?'' Phys. Fluids. 24, 116601, 2012.
Rabin, S.M.E., Caulfield, C.P. & Kerswell, R.R. ``Variational identification of minimal seeds to trigger transition in plane Couette flow''J. Fluid Mech.712, 244-272, 2012.
Chandler, G.J & Kerswell, R.R. ``Simple invariant solutions embedded in 2D Kolmogorov turbulence'' J. Fluid Mech. accepted version 2013.

Postdocs:

Ashley Willis, EPSRC-funded 2005-2008 (now Lecturer at Sheffield Univ.)
Yohann Duguet, Marie-Curie Fellow 2006-2008 (now CNRS, LIMSI, Paris)
Laurent Lacaze, Marie-Curie Fellow 2006-2008 (now CNRS, IMFT, Toulouse)
Mark Woodhouse, Renishaw & North Bristol NHS Trust funded 2007-2009 (followed by postdocs at Manchester and Bristol Universities)
Gary Chandler, EPSRC-funded 2010-2011 (now dabbling in the Tokyo stock market)
Dan Lucas, EPSRC-funded 2012-2013

Graduate students:

Darren Mason 1995-1999 (now working at IPL in software development).
Denise Cooper (née Barnes) 1996-2000 (senior software engineer at Radan Computational Ltd in CAD).
Robert Mason 1998-2001 (followed by a postdoc in Earth Science with Prof. S. Sparks and is now working at Serco Assurance in scientific consultancy).
Stephen Plasting 2000-2004 (followed by a postdoc at Scripps Oceanographic Institute, San Diego with Prof. W.R. Young; now Vice-President at Goldman Sachs, New York).
Hakan Wedin 2001-2004 (followed by postdocs at Kyoto University with Prof. M. Nagata and now Genoa University with Prof. A. Bottaro).
Chris Pringle 2005-2009 (then a postdoc at Reading and now back in Earth Sciences at Bristol.)
Helen Sweeney 2008-2011 (now training with Teach First)
Matthew Chantry 2010-present
Daniel Olvera 2012-present
Judith Robinson 2012-present