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Personal information

Jens H. M. Fransson

Associate Professor, Docent
Phone: +46 8 790 6193
Fax: +46 8 790 7654
E-mail: jensf@mech.kth.se
WWW: Personal homepage


Education

  • Master of Science Degree in Engineering Physics (sv. civ. ing. Teknisk Fysik) 1999 at KTH
  • Teknologie Licentiate 2001, KTH Mechanics
  • Teknologie Doctor 2004, KTH Mechanics
  • Docent in Fluid Physics in 2007

Professional history

  • PhD student 1999-2004, KTH Mechanics
  • Research Associate (sv. Forskarassistent), KTH Mechancis, 2004-2008
  • Associate Professor, KTH Mechanics, 2009-

Research and Professional Activities

Research on:

  • Boundary layer transition to turbulence
  • Control of boundary layer transition
  • Flow control of wakes behind bluff bodies
  • Separation control

Teaching activity

Leader for the following list of courses.
For the complete list of courses at mechanics, see the course page

CourseProg. TitleStudiehandbok
SG2221  All  Wave Motions and Hydrodynamic Stability [swe] [eng]

Publications

Please note that this list might not be complete. Follow each article link for additional authors.
Year Title
2013 Obtaining accurate mean velocity measurements in high Reynolds number turbulent boundary layers using Pitot probes
J. Fluid Mech. 715 642-670
2013 Stability analysis of experimental flow fields behind a porous cylinder for the investigation of the large-scale wake vortices
J. Fluid Mech. 715 599-536
2012 Revival of Classical Vortex Generators Now for Transition Delay
Physical Review Letters 109 
2011 Transient growth in the asymptotic suction boundary layerExp.
Expriments in Fluids 51 771-784
2011 Boundary layer receptivity to free-stream turbulence and surface roughness over a swept flat plate
Physics of Fluids 23 034107-1
2011 An experimental study on wake evolution and trailing vortex instabilities
Proceedings of Wake Conference, Visby, June 8-10 2011  
2011 An experimental study on tip vortex instabilities and breakdown
Svenska mekanikdagarna, Göteborg, June 13-15 2011  
2011 High amplitude streaks in boundary layers: a new passive mechanism for transition delay
4th European Conference for Aerospace Sciences Saint Petersburg, Russia, July 4, 2011 – July 8, 2011 2 1-10
2011 Advanced Fluid Research On Drag reduction in Turbulence Experiments - AFRODITE-
Svenska mekanikdagarna, Göteborg, June 13-15 2011 1 75
2011 Experiments on a bluff body wake with varying inlet conditions
Svenska mekanikdagarna, Göteborg, June 13-15 2011 1 73
2011 Transition delay by means of base flow modulations
Svenska mekanikdagarna, Göteborg, June 13-15 2011 1 36
2011 Free-stream turbulence boundary layer transition
Svenska mekanikdagarna, Göteborg, June 13-15 2011 1 38
2011 Gust structure and generation in canopy flows
EWEA conference, Brussels, Belgium, March 14-17 2011  
2011 An experimental analysis of canopy flows
Proc. of 13th European Turbulence Conference (ETC 13), Poland (Journal of Physics: Conference Series)  
2011 Wake evolution and trailing vortex instabilities
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 PIV Visualisation study in a two-dimensional room model with rapid time varying ventilation flow rates
ROOMVENT The 12th International Conference on Air Distribution in Rooms, June. 19-22, Trondheim.  
2011 Advanced Fluid Research On Drag reduction In Turbulence Experiments - AFRODITE
Proc. of 13th European Turbulence Conference (ETC 13), Poland (Journal of Physics: Conference Series) 318 032007
2011 E ffect of free-stream turbulence characteristics on boundary layer transition
Proc. of 13th European Turbulence Conference (ETC 13), Poland (Journal of Physics: Conference Series) 318 032019
2011 Base flow modulations for skin-friction drag reduction
Proc. of 13th European Turbulence Conference (ETC 13), Poland (Journal of Physics: Conference Series) 318 032008
2011 Transition delay by means of base flow modulations
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 Advanced Fluid Research On Drag reduction In Turbulence Experiments - AFRODITE
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 Measurements in a bluff body wake with variable inlet conditions
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 Natural by-pass boundary layer transition
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 Stability and sensitivity analysis of experimental flow fields measured past a porous cylinder
Bulletin of the American Physical Society, 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, November 20-22 2011  
2011 On the generation of steady streamwise streaks in flat plate boundary layers
J. Fluid Mech.  
2010 On near wall measurements of wall bounded flows—The necessity of an accurate determination of the wall position
Prog. Aerosp. Sci. 46 353-387
2010 Turbulent spot evolution in spatially invariant boundary layers
Phys. Rev. E. 81 035301-1
2010 Experimental investigation of the influence of inlet conditions to a bluff body wake
Bulletin of the American Physical Society, 63rd Annual Meeting of the APS Division of Fluid Dynamics, November 21–23, 2010, Long Beach, California  
2010 Experimental investigation of the wake instability behind a rectangular-based forebody
6th IUTAM Symposium on Bluff Body Wakes and Vortex-Induced Vibrations, June 22-25, 2010, Capri Island, Italy.  
2010 Optimization and control of wind farms: Tip vortex breakdown and wake flow interaction
Poster presentation, Vindkraftsforskning i fokus, Göteborg, November 24-25 2010  
2010 Evolution Of Traveling Crossflow Modes Over A Swept Flat Plate
Proceedings of the Seventh IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, Sweden, 2009  231-236
2010 High amplitude steady streaks in flat plate boundary layers
40th AIAA Fluid Dynamics Conference and Exhibit. Chicago, Illinois, USA. 28 June - 1 July 2010 15 1-14
2009 CICLoPE - a response to the need for high Reynolds number experiments
Fluid Dynamics Research 41  021407
2009 Grid generated turbulence revisited
Fluid Dynamics Research 41 021403
2009 Streamwise evolution of longitudinal vortices in a turbulent boundary layer
J. Fluid Mech. 623 27-58
2009 Turbulent boundary layers up to Re_\theta=2500 studied through simulation and experiment
Physics of Fluids 21 051702
2009 On imperfect hot-wire resolution issues and their effect on mean quantities
Advances in Turbulence XII, Springer Proceedings in Physics 132 605-608
2009 New results on grid-generated turbulence
Advances in Turbulence XII, Proc. 12th EUROMECH ETC, Sept. 7-10, 2009, Marburg, Germany  
2009 Evolution of Traveling Crossflow Modes over a Swept Flat Plate
Proceedings of the Seventh IUTAM Symposium on Laminar-Turbulent Transition, Stockholm, Sweden, 2009 18 
2009 Turbulence Measurements with Hot Wires in High Reynolds Number Boundary Layers
Bulletin of the American Physical Society, 62nd Annual Meeting of the APS Division of Fluid Dynamics, Volume 54, Number 19, Sunday–Tuesday, November 22–24, 2009, Minneapolis, Minnesota  54 21
2009 Transition to turbulence delay by means of a passive mechanism
CEAS/KATnet II Conference on Key Aerodynamic Technologies, 12-15 May 2009, Bremen 1 
2009 Experimental investigation of turbulent patch evolution in spatially steady boundary layers
Advances in Turbulence XII, Proc. 12th EUROMECH ETC, Sept. 7-10, 2009, Marburg, Germany  
2009 Vortex statistics in a bluff body wake with varying inlet conditions
Bulletin of the American Physical Society, 62nd Annual Meeting of the APS Division of Fluid Dynamics, Volume 54, Number 19, Sunday–Tuesday, November 22–24, 2009, Minneapolis, Minnesota  54 (19) 125
2009 The diagnostic plot - a new way to appraise turbulent boundary layer data
Advances in Turbulence XII, Springer Proceedings in Physics 132 609-612
2008 Shear effect on pressure and particle acceleration in high-Reynolds-number turbulence
Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence, Nagoya University, Nagoya, Japan, September, 11-14, 2006. Part II. Kaneda, Yukio (Ed.) 2008, Springer.  
2008 Experimental study of turbulent spot evolution in the ASBL
7th Eur. Fluid Mech. Conf. EFMC7, Manchester, 14-18 Sept. 2008.  104
2008 Vortex analysis in the near wake behind a porous cylinder subject to blowing or suction
7th Eur. Fluid Mech. Conf. EFMC7, Manchester, 14-18 Sept. 2008.  96
2008 Effect of surface roughness and FST on crossflow instability
7th Eur. Fluid Mech. Conf. EFMC7, Manchester, 14-18 Sept. 2008.  181
2008 Turbulent spot evolution in the ASBL
61rd Meeting of the APS Division of Fluid Dynamics, Nov. 23-25, San Antonio, TX, USA. Abstract in Bull. Am. Phys. Soc.  62
2008 Wake flow manipulation by means of blowing and suction
Proc. XXII ICTAM, 25--29 August 2008, Adelaide, Australia  128
2008 Experimental determination of the aero-acoustic properties of an in-duct flexible plate
AIAA-2008-3057, 14th AIAA/CEAS Aeroacoustic Conference, Vancouver, Canada, May 5-7, 2008.  
2008 Effect of surface roughness and FST on crossflow instability
7th Eur. Fluid Mech. Conf. EFMC7, Manchester, 14-18 Sept. 2008.  
2007 Pressure statistics and their scaling in high-Reynolds-number turbulent boundary layers
J. Fluid Mech. 585 1-40
2007 Research on the interaction between streamwise streaks and Tollmien–Schlichting waves at KTH
ERCOFTAC Bulletin 74 37-43
2007 Transient growth in the asymptotic suction boundary layer
60th Meeting of the APS Division of Fluid Dynamics, Nov 18–20, Salt Lake City (UT), USA. Abstract in Bull. Am. Phys. Soc.  
2006 Delaying transition to turbulence by a passive mechanism
Physical Review Letters 96 064501
2006 Experimental study of the stabilization of Tollmien-Schlichting waves by finite amplitude streaks
Laminar-Turbulent Transition, Proc. IUTAM Symp., Bangalore, Dec. 13-17. 2004. Ed. Rama Govindarajan, Springer,   p. 299-304
2006 Experimental analysis of transition delay by means of roughness elements
AIAA-06-3528, 36th AIAA Fluid Dynamics Conference and Exhibit, June 5-8, San Francisco  
2006 Using non-normality for passive laminar flow control
Proceedings of the 14th European Conference on Mathematics for Industry, Leganés, Madrid, Spain, July 10-14.  
2006 Transition delay by roughness elements
Whither Turbulence Prediction and Control. March 26-29, Seoul National University, Seoul, Korea.   
2006 Vortical structures generated by a time varying jet flow in a ventilated enclosure
6th Euromech Fluid Mech. Conf., June 26-30, 2006. 2 315
2006 Delaying transition to turbulence by a passive mechanism
6th Euromech Fluid Mech. Conf., June 26-30, 2006. 2 360
2005 Transition induced by free stream turbulence
J. Fluid Mech. 527 1-25
2005 Experimental study of the stabilization of Tollmien-Schlichting waves by finite amplitude streaks
Phys. Fluids 17 (5) 054110
2005 Stabilization of Tollmien Schlichting waves by means of roughness generated streaks
Proc. 18th AIDAA 2005  
2005 Transition delay by means of a passive mechanism
58th Meeting of the APS Division of Fluid Dynamics, Nov. 20-22, Chicago (IL), USA. Abstract in Bull. Am. Phys. Soc. 50 
2005 Pressure statistics in high-Reynolds number turbulent boundary
Turbulence and Shear Flow Phenomena - 4  
2004 Flow around a porous cylinder subject to continuous suction or blowing
J. Fluid. Struct. 19 1031-1048
2004 Free stream turbulence induced disturbances in boundary layers with wall suction
Phys. Fluids 16 3530-3539
2004 Experimental and theoretical investigation of the non-modal growth of steady streaks in a flat plate boundary layer
Phys. Fluids 16 3627-3638
2004 Leading edge design process using a commercial flow solver
Exp. in Fluids 37 929-932
2003 Optimal linear growth in the asymptotic suction boundary layer
Eur. J. Mech./Fluids 22/3 259-270
2003 On the disturbance growth in an asymptotic suction boundary layers
J. Fluid Mech. 482 51-90
2003 On the hydrodynamic stability of channel flow with cross flow
Phys. Fluids 15 436-441
2003 Evolution of disturbances in boundary layers with wall suction
Turbulence and Shear Flow Phenomena - 3 1 489-494
2003 Experimental analysis of the evolution of steady disturbances in a flat plate boundary layer
Proc. 17th AIDAA 2003  
2003 Experimental analysis of the evolution of steady disturbances in a flat plate boundary layer
In Atti del XVII Congresso Nazionale dell'Associazione Italiana di Aeronautica e Astronautica. Rome, Italy, Sept. 15-19.  
2003 Stabilisation of Tollmien-Schlichting waves by streaky base flow
56th Meeting of the APS Division of Fluid Dynamics, Nov. 23-25, East Rutherford (NJ), USA. Abstract in Bull. Am. Phys. Soc. 48 
2002 Error in hot-wire X-probe measurements induced by unsteady velocity gradients
Expriments in Fluids 32 413-415
2001 Free stream turbulence induced disturbances in a uniform suction boundary layer
Turbulence and Shear Flow Phenomena - 2 1 353-358
2000 Growth and breakdown of streaky structures in boundary layer transition induced by free stream turbulence
Laminar-Turbulent Transition, Proc. IUTAM Symp., Sedona, Sept. 13-17. 1999. Eds Fasel H.F. & Saric W.S., Springer  371-376
2000 Free stream turbulence induced disturbances in a uniform suction boundary layer
53rd Meeting of the APS Division of Fluid Dynamics, Nov. 19-21, Washington (D.C.), USA. Abstract in Bull. Am. Phys. Soc. 45 

Internal reports

Please note that this list might not be complete.
Year Title Type
2003 Flow control of boundary layers and wakes Doctoral thesis
2001 Investigations of the asymptotic suction boundary layer Licentiate thesis

Projects

Please note that this list might not be complete.
Period Title Area
2010-2015 AFRODITE - Advanced Fluid Research On Drag reduction In Turbulence Experiments Fluid mechanics
2005-2011 Active control of vortex shedding behind bluff bodies Fluid mechanics
2003- Laminar-Turbulent transition delay by means of passive control Fluid mechanics
1992- Experiments on stability, transition, separation and turbulence in boundary layer flows. Fluid mechanics
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Last changed: 2006-08-24