Stefan Llewellyn Smith's Home Page

Calendar

Teaching

Current courses

• MAE294B Winter quarter 2010
• MAE210C Spring quarter 2010
  

Old courses

Enviromental Engineering in MAE

Poster: (.ps),(.pdf).

Research

Interests

• Fluid dynamics, in particular applied to oceanographic and industrial problems, including mixing and transport.
• Vortex-wave interactions, with applications to vortex propagation.
• Acoustics, including fluid-structure.
• Asymptotic analysis.
  

Projects

• Altimetric measurement of large-scale ocean turbulence
• Friction welding
• Critical layers on vortices
• Scattering by stratified and three-dimensional vortices
• Vortex dynamos
• Instability of colliding vortex rings
• Short-wave scattering by vortices
• Acoustic scattering in superfluids
• Tidal conversion
• Dispersion in plumes
• Near-inertial oscillations
• Maxwell's problem
• Sea-breeze scatterometry
• Edge waves
  
• Hydrate dissociation (MAE, Pittsburgh)
• Internal waves
• Horizontal convection
• Vortex shedding
  

Collaborators (all of them)

• David Abrahams, University of Manchester
  
• Alex Adamou, ex-Imperial
  
• Mokhtar Adda-Bedia, ENS
  
• Vartkess Apkarian, UCI
  
• Neil Balmforth, UBC
• Greg Buck, Saint Anselm College
  
• Oliver Bühler, Courant Institute
  
• George Carnevale, SIO
• Colm Caulfield, UCSD
  
• Greg Chini, UNH
  
• Richard Craster, Imperial College
• Fulvio Crisciani, Istituto Talassografico di Trieste
• Darren Crowdy, Imperial College
  
• Tony Davis, UCSD (visitor)
  
• Emanuele di Lorenzo, SIO
  
• Stéphan Fauve, ENS
  
• Rupert Ford (1968-2001)
• Sarah Gille, UCSD
• Beverley Glover, University of Cambridge
  
• Yuji Hattori, Tohoku University
• Myrl Hendershott, SIO
• David Hill, Caltech
  
• John Hinch, DAMTP
• Anette (Peko) Hosoi, MIT
• Glenn Ierley, SIO
• Ken Janda, UCI
• Ted Johnson, UCL
  
• Ken Jordan, University of Pittsburgh
  
• Tsutomu Kambe, formerly University of Tokyo
• Joe Keller, Stanford
• Patrice Klein, IFREMER
• Eric Kunze, University of Victoria
  
• Guillaume Lapeyre, ENS
  
• Shira Lee, ex-MIT
• Jim Leichter, SIO
• Paul Martin, Colorado School of Mines
  
• Jeff Moehlis, Princeton
• Walter Munk, SIO
• Tim Myers, University of Cape Town
  
• Paolo Orlandi, University of Rome "La Sapienza"
• Bob Parker, SIO
• François Pétrélis, ENS
  
• Larry Pratt , WHOI
• Roberto Purini, Istituto Talassografico di Trieste
• Bill Reeburgh, UCI
• Bonnie Ripley, USD (SCMI)
• James Rottman, SAIC & UCSD
• Tapio Schneider, Caltech
  
• Roberta Seravall
• Stephen Siklos, DAMTP
• Nick Statom, UCSD
• Daniel Tartakovsky, UCSD
• Elinor Thompson, University of Cambridge
  
• Steve Tobias, University of Leeds
• Grae Worster, DAMTP
• Hund-Der Yeh, National Chiao Tung University
  
• Bill Young, SIO

Students and postdocs (present and past)

• Océane Arboun, 2002 (visiting student from ENS Lyon).
• Eric Arobone, 2008- (joint student with Sutanu Sarkar).
  
• Pierre Augier, 2005 (visiting student from ENS Lyon).
• Pierre Boivin, 2006 (visiting student from Ecole Polytechnique).
• Devin Conroy, Ph.D. Chemically reacting plumes, gas hydrate dissociation and dendrite solidification 2008.
• Alexis Cuquel, 2009 (visiting student from ENSTA).
  
• Erik Hurlen, Ph.D. The motions and wave fields produced by an ellipse moving through a stratifed fluid 2006.
• Marcel Ilie, 2008-.
  
• Emanuele di Lorenzo, 2003 (joint postdoc at SIO with Bill Young).
• Katarzyna Matusik, 2008-.
  
• Sébastien Michelin, Ph.D. Falling, flapping, flying, swimming,...: high-Re fluid-solid interactions with vortex shedding 2009.
  
• Vincent Morin, 2006-2007.
• Alexandre Paci, 2003 (visiting student from METEO-France).
• François Pétrélis, 2003 (joint postdoc with Bill Young).
• Thomas-Jérémie Sablong, 2007 (visiting student from IFMA).
  
• Wenbo Tang, 2005-2006.
  
• Javier Urzay, 2005- (joint student with Forman Williams).

Papers

Refereed papers

1. Llewellyn Smith, S. G. 1995. The influence of circulation on the stability of vortices to mode-one disturbances. Proc. R. Soc. Lond. A, 451, 747-755, doi:10.1098/rspa.1995.0153. (Local post-print,  PRSA version)
2. Llewellyn Smith, S. G. 1997 The motion of a non-isolated vortex on the beta-plane. J. Fluid Mech., 346, 149-179. (© 1997 Cambridge University Press, local pdf, JFM version)
3. Pratt, L. J. & Llewellyn Smith, S. G. 1997 Hydraulically-drained flows in rotating basins. Part I: Method. J. Phys. Oceanogr., 27, 2509-2521, doi:10.1175/1520-0485(1997)027<2509:HDFIRB>2.0.CO;2. (© Copyright 1997 AMS, local pdf, JPO version)
   
4. Balmforth, N. J., Llewellyn Smith, S. G. & Young, W. R. 1998 Dynamics of interfaces and layers in a stratified turbulent fluid. J. Fluid Mech., 355, 329-358. (© 1998 Cambridge University Press, local pdf, JFM version)
5. Balmforth, N. J., Llewellyn Smith, S. G. & Young, W. R. 1998 Enhanced dispersion of near-inertial waves in an idealized geostrophic flow. J. Mar. Res., 56, 1-40. (Local pdf, JMR version)
6. Llewellyn Smith, S. G. & Gille, S. T. 1998 Probability density functions of large-scale turbulence in the ocean. Phys. Rev. Lett., 81, 5249-5252, doi:10.1103/PhysRevLett.81.5249. (Local pdf, PRL version)
7. Llewellyn Smith, S. G. 1999 Near-inertial oscillations of a barotropic vortex: trapped modes and time evolution. J. Phys. Oceanogr., 29, 747-761, doi:10.1175/1520-0485(1999)029<0747:NIOOAB>2.0.CO;2. (© Copyright 1997 AMS, local pdf, JPO version)
8. Llewellyn Smith, S. G. & Craster, R. V. 1999 Numerical and asymptotic approaches to scattering problems involving finite elastic plates in structural acoustics. Wave Motion, 30, 17-41, doi:10.1016/S0165-2125(98)00051-1. (Local post-print, WM version)
9. Ford, R. & Llewellyn Smith, S. G. 1999 Scattering of acoustic waves by a vortex. J. Fluid Mech., 386, 305-328. (© 1999 Cambridge University Press, local pdf, JFM version)
10. Carnevale, G. F., Llewellyn Smith, S. G., Crisciani, R., Purini, R. & Serravall, R. 1999 Bifurcation of a coastal current at an escarpment. J. Phys. Oceanogr., 29, 969-985, doi:10.1175/1520-0485(1999)029<0969:BOACCA>2.0.CO;2. (© Copyright 1999 AMS, local pdf, JPO version)
11. Craster, R. V. & Llewellyn Smith, S. G. 1999 A class of expansion functions for finite scattering problems in structural acoustics. J. Acoust. Soc. Am., 106, 3128-3134, doi:10.1121/1.428166. (Local pdf, JASA version)
12. Gille, S. T. & Llewellyn Smith, S. G. 2000 Velocity probability density functions from altimetry. J. Phys. Oceanogr., 30, 125-136, doi: 10.1175/1520-0485(2000)030<0125:VPDFFA>2.0.CO;2. (© Copyright 2000 AMS, local pdf, JPO version)
13. Llewellyn Smith, S. G. 2000 The asymptotic behaviour of Ramanujan's integral and its application to two-dimensional diffusion-like equations. Eur. J. Appl. Math., 11, 13-28. (© 2000 Cambridge University Press, local pdf, EJAM version)
14. Llewellyn Smith, S. G. 2000 Energy and pseudomomentum of propagating disturbances on the beta-plane. Dyn. Atmos. Oceans, 32, 135-151, doi:10.1016/S0377-0265(99)00019-6. (DAO version)
    
15. Balmforth, N. J., Llewellyn Smith, S. G. & Young, W. R. 2001 Disturbing vortices. J. Fluid Mech., 426, 95-133. (© 2001 Cambridge University Press, local pdf, JFM version)
16. Moehlis, J. & Llewellyn Smith, S. G. 2001 Radiation of mixed layer near-inertial oscillations. J. Phys. Oceanogr., 31, 1550-1560, doi: 10.1175/1520-0485(2001)031<1550:ROMLNI>2.0.CO;2. (© Copyright 2001 AMS, local pdf, JPO version)
17. Llewellyn Smith, S. G. & Ford, R. 2001 Three-dimensional acoustic scattering by vortical flows. Part I: General theory. Phys. Fluids, 13, 2876-2889, doi:10.1063/1.1401815. (© 2001 American Institute of Physics, local pdf, PofF version)
18. Llewellyn Smith, S. G. & Ford, R. 2001 Three-dimensional acoustic scattering by vortical flows. Part II: Axisymmetric scattering by Hill's spherical vortex. Phys. Fluids, 13, 2890-3000, doi:10.1063/1.1401814. (© 2001 American Institute of Physics, local pdf, PoF version)
19. Klein, P. & Llewellyn Smith, S. G. 2001 Horizontal dispersion of near-inertial oscillations in a turbulent mesoscale eddy field. J. Mar. Res., 59, 697-723. (Local pdf, JMR version)
20. Llewellyn Smith, S. G. 2002 Scattering of acoustic waves by a superfluid vortex. J. Phys. A, 35, 3597-3607, doi:10.1088/0305-4470/35/16/302. (Local post-print, JPA version)
21. Llewellyn Smith, S. G. & Young, W. R. 2002 Conversion of the barotropic tide. J. Phys. Oceanogr., 32, 1554-1566, doi: 10.1175/1520-0485(2002)032<1554:COTBT>2.0.CO;2. (© Copyright 2002 AMS, local pdf, JPO version)
22. Hattori, Y. & Llewellyn Smith, S. G. 2002 Axisymmetric acoustic scattering by vortices. J. Fluid Mech., 473, 275-294, doi: 10.1017/S002211200200246X. (© 2002 Cambridge University Press, local pdf, JFM version)
23. Gille, S. T., Llewellyn Smith, S. G. & Lee, S. M. 2003 Measuring the sea breeze from QuikSCAT scatterometry. Geophys. Res. Lett., 30, 1114, 10.1029/2002GL016230. (Local post-print. An edited version of this paper was published by AGU. Copyright 2003 American Geophysical Union. GRL version)
24. Llewellyn Smith, S. G. & Young, W. R. 2003 Tidal conversion at a very steep ridge. J. Fluid Mech., 495, 175-191, doi:10.1017/S0022112003006098. (© 2003 Cambridge University Press, local pdf, JFM version)
25. Llewellyn Smith, S. G. & Tobias, S. M. 2004 Vortex dynamos. J. Fluid Mech., 498, 1-21, doi:10.1017/S0022112003007006. (© 2004 Cambridge University Press, local pdf, JFM version)
26. Llewellyn Smith, S. G. 2004 Stratified rotating edge waves.  J. Fluid Mech., 498, 161-170, doi:10.1017/S002211200300702X. (© 2004 Cambridge University Press, local pdf, JFM version)
27. Klein, P., Llewellyn Smith, S. G. & Lapeyre, G. 2004 Organization of inertial energy by an eddy field. Q. J. Roy. Meteorol. Soc., 130, 1153-1166, doi: 10.1256/qj.02.231. (© Royal Meteorological Society, 2004, local pdf, QJRMS version)
28. Gille, S. T., Llewellyn Smith, S. G. & Statom, N. M. 2005 Global observations of land breeze diurnal variability. Geophys. Res. Lett., 32, L05605, doi: 10.1029/2004GL022139. (Local post-print. An edited version of this paper was published by AGU. Copyright 2005 American Geophysical Union. GRL version)
    
29. Conroy, D. T., Llewellyn Smith, S. G. & Caulfield, C. P. 2005 Evolution of a chemically reacting plume in a ventilated room. J. Fluid Mech., 537, 221-253, doi:10.1017/S0022112005005094. (© 2005 Cambridge University Press, local pdf, JFM version)
30. Petrelis, F., Llewellyn Smith, S. G. & Young, W. R. 2006 Tidal conversion at a submarine ridge. J. Phys. Oceanogr., 36, 1053-1071, doi:10.1175/JPO2879.1. (© Copyright 2006 AMS, local pdf, JPO version)
31. Di Lorenzo, E., Llewellyn Smith, S. G. & Young, W. R. 2006 Numerical and analytical estimates of M₂ tidal conversion at steep oceanic ridges.  J. Phys. Oceanogr., 36, 1072-1084, doi:10.1175/JPO2880.1. (© Copyright 2006 AMS, local pdf, JPO version)
32. Adda-Bedia, M. & Llewellyn Smith, S. G. 2006 Supersonic and subsonic states of dynamic contact between elastic bodies. Proc. R. Soc. Lond. A., 462, 2781-2795, doi:10.1098/rspa.2006.1709. (Local post-print, PRSA version)
    
33. Davis, A. M. J. & Llewellyn Smith, S. G. 2007 Perturbation of eigenvalues due to gaps in 2-D boundaries. Proc. R. Soc. Lond. A., 463, 759-786, doi:10.1098/rspa.2006.1796. (Local post-print, PRSA version)
    
34. Urzay, J., Llewellyn Smith, S. G. & Glover, B. J. 2007  The elastohydrodynamic force on a sphere near a soft wall. Phys. Fluids., 19, 103106, doi:0.1063/1.2799148. (© 2007 American Institute of Physics, local pdf, PoF version)
    
35. Adamou, A. T. I., Craster, R. V. & Llewellyn Smith, S. G. 2007 Trapped edge waves in stratified rotating fluids: Numerical and asymptotic results. J. Fluid Mech.,  592, 195-220, doi:10.1017/S0022112007008361. (© 2007 Cambridge University Press, local pdf, JFM version)
    
36. Abrahams, I. D, Davis, A. M. J. & Llewellyn Smith, S. G. 2008 Matrix Wiener-Hopf approximation for a partially clamped plate. Q. J. Mech. Appl. Math., doi:10.1093/qjmam/hbn004. (QJMAM version)
37. Abrahams, I. D, Davis, A. M. J. & Llewellyn Smith, S. G. 2008 Asymmetric channel divider in Stokes flow. SIAM J. Appl. Math., 68, 1439-1463, doi:10.1137/070703211. (© 2008 Society for Industrial and Applied Mathematics, local pdf, SIAMJAM version)
    
38. Llewellyn Smith, S. G., Michelin, S. & Crowdy, D. G. 2008 The dipolar field of rotating bodies in two dimensions. J. Fluid Mech., 607, 109-118, doi:10.1017/S0022112008001857. (© 2008 Cambridge University Press, local pdf, JFM version)
    
39. Conroy, D. T. & Llewellyn Smith, S. G. 2008 Endothermic and exothermic chemically-reacting plumes. J. Fluid Mech., 612, 291-310,  doi:10.1017/S0022112008002917. (© 2008 Cambridge University Press, local pdf, JFM version)
    
40. Michelin, S., Llewellyn Smith, S. G. & Glover, B. J. 2008 Vortex shedding model of a flapping flag. J. Fluid Mech., 617, 1-10, doi:10.1017/S0022112008004321. (© 2008 Cambridge University Press, local pdf, JFM version)
    
41. Llewellyn Smith, S. G. & Davis, A. M. J. 2009 Time-dependence of groundwater pumping from a well near a river. Proc. R. Soc. Lond. A., 465, 175-92, doi:10.1098/rspa.2008.0204. (Local post-print, PRSA version)
    
42. Michelin, S. & Llewellyn Smith, S. G. 2009 An unsteady point vortex method for coupled fluid-solid problems. Theor. Comp. Fluid Dyn., 23, 127-153, doi:10.1007/s00162-009-0096-7. (Open Access pdf)
    
43. Urzay, J., Llewellyn Smith, S. G., Thomson, E. & Glover, B. J. 2009 Wind gusts and plant aeroelasticity effects on the aerodynamics of pollen shedding: a hypothetical turbulence-initiated wind-pollination mechanism. J. Theor. Biol.,  259, 785-792, doi:10.1016/j.jtbi.2009.04.027. (Local post-print, JTB version)
    
44. Michelin, S. & Llewellyn Smith, S. G. 2009 Falling cards and flapping flags: understanding fluid-solid interactions using an unsteady point vortex model. Theor. Comp. Fluid Dyn., doi:10.1007/s00162-009-0117-6. (Open Access pdf)
    
45. Michelin, S. & Llewellyn Smith, S. G. 2009 Resonance and propulsion performance of a heaving flexible wing. Phys. Fluids. 21, 071902, doi:10.1063/1.3177356. (© 2009 American Institute of Physics, local pdf, PofF version)
46. Michelin, S. & Llewellyn Smith, S. G. 2009 Linear stability analysis of coupled parallel flexible plates in an axial flow. J. Fluids Struct., 25, 1136-1157, doi:10.1016/j.jfluidstructs.2009.06.002. (Local post-print, JFS version)
    

Non-refereed papers

1. Kunze, E. & Llewellyn Smith, S. G. 2004 The role of small-scale topography in turbulent mixing of the global ocean. Oceanography, 17, 55-64. (Local pdf, TOS version)
   
2. Scott, E. C., ... Llewellyn Smith, S. G. et al. 2004. The morphology of Steve. Ann. Improbable Res., 10, July/August. 24-29. (AIR version)
   
   

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