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Personal information

Ramis Örlü

PhD
Phone: +46 8 790 67 52
Fax: +46 8 790 76 54
E-mail: ramis@mech.kth.se
WWW: Personal homepage


Education

  • PhD in Mechanics 2009 at KTH.
  • Licentitate in Fluid Mechanics 2006 at KTH.
  • Master of Science (Dipl.-Ing.) in Applied Mechanics 2003 at Ruhr University of Bochum, Germany.

Professional history

  • Researcher at KTH Mechanics, 2009-present.
  • PhD student at KTH Mechanics 2004-2009.

Research and Professional Activities

  • Experiments in free (round, coaxial, swirling jets) and wall-bounded (boundary layers and pipe) turbulent shear flows by means of hot/cold-wire anemometry, laser Doppler and particle image velocimetry → Experimental data base
  • Applied research on velocity and temperature measurements in flows related to Internal Combustion Engines. → CCGEx

  • GoogleScholar Profile

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 Turbulent pipe flow downstream a 90 degree pipe bend with and without superimposed swirl
Int. J. Heat and Fluid Flow  
2013 Uncertainty analysis of the von Kármán constant
Exp. Fluids 54 1460
2013 Turbulent boundary layers over flat plates and rotating disks – the legacy of von Kármán: a Stockholm perspective
Eur. J. Mech. B/Fluids 40 17-29
2013 A note on the effect of the separation wall in the initial mixing of coaxial jets
Exp. Fluids 54 1483
2013 Correcting hot-wire spatial resolution effects in third and fourth-order velocity moments in wall-bounded turbulence
Exp. Fluids 54 1496
2013 Comparison of experiments and simulations for zero pressure gradient turbulent boundary layers at moderate Reynolds numbers
Exp. Fluids  
2012 A new way to determine the wall position and friction velocity in wall-bounded turbulent flows
Progress in Turbulence and Wind Energy IV, Springer Proceedings in Physics  181-185
2012 Turbulent boundary-layer flow: Comparing experiments with DNS
Progress in Turbulence and Wind Energy IV, Springer Proceedings in Physics  213-216
2012 Dean vortices in turbulent flows: rocking or rolling?
Journal of Visualization 15 37-38
2012 Experimental investigation on the effect of pulsations on exhaust manifold-related flows aiming at improved engine efficiency
10th International Conference on Turbochargers and Turbocharging (iMechE), London, UK, May 15-16, 2012  377-387
2012 Experimental analysis of turbocharger interaction with a pulsatile flow through time-resolved flow measurements upstream and downstream the turbine
10th International Conference on Turbochargers and Turbocharging (iMechE), London, UK, May 15-16, 2012  405-415
2012 Rare backflow and extreme wall-normal velocity fluctuations in near-wall turbulence
Phys. Fluids 24 035110
2012 A new formulation for the streamwise turbulence intensity distribution in wall-bounded turbulent flows
Eur. J. Mech. B/Fluids 36 167–175
2012 A flow facility for the characterization of pulsatile flows
Flow. Meas. Instrum. 26 10-17
2012 Experimental investigation on the secondary motion downstream a pipe bend with and without swirl
Proc 9th Int. ERCOFTAC Symposium on Engineering Turbulence Modeling and Measurements (ETMM9), Thessaloniki, Greece, Jun. 6-8 (2012)  1-6
2012 Effect of the separation wall in the mixing properties of coaxial jets
Proc 9th Int. ERCOFTAC Symposium on Engineering Turbulence Modeling and Measurements (ETMM9), Thessaloniki, Greece, Jun. 6-8 (2012)  1-6
2012 Turbulent boundary layers at moderate Reynolds numbers: inflow length and tripping effects
J. Fluid Mech. 710 5-34
2012 The quest for the von Kármán constant
65th Annual Meeting of the APS Division of Fluid Dynamics, November 18–20, 2012, San Diego, USA 57 
2012 Comment on the scaling of the near-wall streamwise variance peak in turbulent pipe flows
Exp. Fluids 54 1431
2012 Revisiting the near-wall scaling of the streamwise variance in turbulent pipe flows
Progress in Turbulence V, Proc. iTi Conference in Turbulence 2012  
2012 The characteristics of turbulence in curved pipes under highly pulsatile flow conditions
Progress in Turbulence V, Proc. iTi Conference in Turbulence 2012  
2012 The streamwise turbulence intensity - a comparison between smooth and rough wall turbulent boundary layers
Progress in Turbulence V, Proc. iTi Conference in Turbulence 2012  
2011 The life of a vortex in an axisymmetric jet
Journal of Visualization 14 5-6
2011 The viscous sublayer revisited—exploiting self-similarity to determine the wall position and friction velocity
Exp. Fluids 51 271-280
2011 A method to estimate turbulence intensity and transverse Taylor microscale in turbulent flows from spatially averaged hot-wire data
Exp. Fluids 51 693-700
2011 A new scaling for the streamwise turbulence intensity in wall-bounded turbulent flows and what it tells us about the "outer" peak
Phys. Fluids 23 041702
2011 Pulsatile turbulent flow through pipe bends at high Dean and Womersley numbers
J. Phys.: Conf. Ser. 318 092023
2011 A new formulation for the streamwise turbulence intensity distribution
J. Phys.: Conf. Ser. 318 022002
2011 A method to correct third and fourth order moments in turbulent flows
J. Phys.: Conf. Ser. 318 042023
2011 Inflow length and tripping effects in turbulent boundary layers
J. Phys.: Conf. Ser. 318 022018
2011 Negative streamwise velocities and other rare events near the wall in turbulent flows
J. Phys.: Conf. Ser. 318 022013
2011 On the fluctuating wall-shear stress in zero pressure-gradient turbulent boundary layer flows
Phys. Fluids 23 021704
2011 Turbulent asymptotic suction boundary layers studied by simulation
J. Phys.: Conf. Ser. 318 022020
2011 On the distribution of the streamwise fluctuation velocity in wall bounded flows
Bulletin of the American Physical Society, 64rd Annual Meeting of the APS Division of Fluid Dynamics, November 20–22, 2011, Baltimore, Maryland 56 
2011 Turbulent boundary layers: Inflow effects and cross-validation of simulation and experiment
Bulletin of the American Physical Society, 64rd Annual Meeting of the APS Division of Fluid Dynamics, November 20–22, 2011, Baltimore, Maryland 56 
2011 Reynolds and swirl number effects on turbulent pipe flow in a 90 degree pipe bend
Bulletin of the American Physical Society, 64rd Annual Meeting of the APS Division of Fluid Dynamics, November 20–22, 2011, Baltimore, Maryland 56 
2011 Turbulent boundary layers in long computational domains
Bulletin of the American Physical Society, 64rd Annual Meeting of the APS Division of Fluid Dynamics, November 20–22, 2011, Baltimore, Maryland 56 
2011 Progress in simulations of turbulent boundary layers
Proceedings of the 7th International Symposium on Turbulence and Shear Flow Phenomena, 28-31 July 2011, Ottawa, Canada  1-10
2011 Dancing in the pipe
APS Online Image Gallery  
2010 Effect of oblique waves on jet turbulence
Seventh IUTAM Symposium on Laminar-Turbulent Transition, IUTAM Bookseries 18 541-544
2010 Experimental study on the use of the wake instability as a passive control in coaxial jet flows
Seventh IUTAM Symposium on Laminar-Turbulent Transition, IUTAM Bookseries 18 361-366
2010 On spatial resolution issues related to time-averaged quantities using hot-wire anemometry
Exp. Fluids 49 101-110
2010 Quantifying the interaction between large and small scales in wall-bounded turbulent flows: A note of caution
Phys. Fluids 22 051704
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 Assessment of direct numerical simulation data of turbulent boundary layers
J. Fluid Mech. 659 116-126
2010 The diagnostic plot — a litmus test for wall bounded turbulence data
Eur. J. Mech. B/Fluids 29 403-406
2010 Experimental investigation on the effect of pulsations on turbulent flow through a 90 degrees pipe bend
3rd Int. Conf. on Jets, Wakes and Separated Flows, Sept 27-30, 2010, Cincinnati, Ohio, USA  1-6
2010 Time-resolved measurements with a vortex flowmeter in a pulsating turbulent flow using wavelet analysis
Meas. Sci. Technol. 21 123001
2010 The viscous sublayer revisited
Bulletin of the American Physical Society, 63rd Annual Meeting of the APS Division of Fluid Dynamics, November 21–23, 2010, Long Beach, California  
2009 Turbulence enhancement in coaxial jet flows by means of vortex shedding
Progress in Turbulence III, Springer Proceedings in Physics 131 235-238
2009 The effect of oblique waves on jet turbulence
Progress in Turbulence III, Springer Proceedings in Physics 131 231-234
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 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 The diagnostic plot - a new way to appraise turbulent boundary layer data
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   
2009 Challenges in Hot Wire Measurements in Wall-Bounded Turbulent Flows
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 20
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 An Experimental Study of the Near-Field Mixing Characteristics of a Swirling Jet
Flow, Turbulence and Combustion 80 323-350
2008 Passive control of mixing in a coaxial jet
Proc. of 7th Int. ERCOFTAC Symp. on Engineering Turbulence Modelling and Measurements (ETMM7) 2 450-455
2008 On the passive control of the near-field of coaxial jets by means of vortex shedding
2nd Int. Conf. on Jets, Wakes and Separated Flows, Sept 16-19, 2008, Berlin, Germany  1-7
2008 Passive scalar flux measurements in the near-field of a swirling jet
Heat Transfer Research 39 597-607
2007 Passive scalar flux measurements in the near field of a swirling jet
Advances in Heat Transfer, Proceedings of the Baltic Heat Transfer Conference, Sep 19-21, 2007, St. Petersburg, Russia 2 532-540
2006 Mixing characteristics in the near-field of a swirling jet
Bulletin of the American Physical Society, 59th Annual Meeting of the APS Division of Fluid Dynamics, Volume 51, Sunday–Tuesday, November 19-21, 2006, Tampa, Florida  
2006 Mixing characteristics in the near-field of a swirling jet
Euromech Fluid Mechanics Conference - 6 (EFMC6), 26-30 June 2006, KTH Mechanics, Stockholm, Sweden. 2 402
2005 A heated swirling jet emanating from a fully developed turbulent pipe flow
6th ExHFT  

Internal reports

Please note that this list might not be complete.
Year Title Type
2009 Experimental studies in jet flows and zero pressure-gradient turbulent boundary layers Doctoral thesis
2006 Experimental study of passive scalar mixing in swirling jet flows Licentiate thesis
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Last changed: 2006-08-24