Ármann Gylfason

2006 Cornell University, Ph.D. Flugvélaverkfræði
2003 Cornell University, M.Sc. Flugvélaverkfræði
2000 Háskóli Íslands, B.Sc. Véla- og Iðnaðarverkfræði

2023- Deildarforseti, Verkfræðideild
2013- Háskólinn í Reykjavík, Dósent
2006-2013: Háskólinn í Reykjavík, Lektor

Haust 2023, Cornell University: CHEME6664 Hydrokinetic and Aerodynamic Energy

Varma- og Rennslisfræði með áherslu á iðustreymi. Áhugi minn beinist að innri gerð iðustreymis, blöndunareiginleikar iðustreymis, og hreyfingu agna í iðustreymi. Ég beiti hermunum, tilraunum sem miða að því að auka skilning okkar á hagnýtum flæðum á borð þau sem finna má nærri vindhverflum, í varmadrifnum flæðum, og náttúrulegum eða verkfræðilegum flæðum sem setin eru ögnum eða dropum. 

Journal Articles

A. Gayout, A. Gylfason, N. Plilon, M. Bourgoin 2023. Fluidelastic modelling of a weathercock stabilization in a uniform flow. Journal of Fluids and Structure. 120, 103895.

C. Lee, Á. Gylfason, P. Perlekar and F. Toschi 2015. Inertial particle acceleration in strained turbulence. J. Fluid Mech. 785, 31-53.

A. Scagliarini, H. Einarsson, A. Gylfason and F. Toschi 2015. Law of the wall in an unstably stratified turbulent channel flow. In Press J. Fluid Mech.

A. Scagliarini, A. Gylfason and F. Toschi 2014. Heat flux scaling in turbulent Rayleigh-Bénard convection with an imposed longitudinal wind. Phys. Rev. E. 89, 043012

D.B. Blum, G.P. Bewley, E. Bodenschatz, M. Gibert, A. Gylfason, L. Mydlarski, G.A. Voth, H. Xu, and P.K. Yeung 2011. Signatures of non-universal scales in conditional structure functions from various turbulent flows. New J. Phys. 13, 113020.

H. Siebert, S. Gerashchenko, A. Gylfason, K. Lehmann, L.R. Collins, R.A. Shaw and Z. Warhaft 2010. Towards understanding of the role of turbulence on droplets in clouds: In situ and Laboratory measurements. Atm. Res. 97, 426-437

A. Gylfason and Z. Warhaft 2009. Effects of axisymmetric strain on a passive scalar field: modeling and experiment. J. Fluid Mech. 628, 339-356.

E. Wei Saw, R. A. Shaw, S. Ayyalasomayajula, P. Y. Chuang, A. Gylfason 2008. Inertial Clustering of Particles in High-Reynolds-Number Turbulence. Phys. Rev. Lett. 100, 214501.

S. Ayyalasomayajula, A. Gylfason, L.R. Collins, E. Bodenschatz and Z. Warhaft 2006. Lagrangian Measurements of Inertial Particle Accelerations in Grid Generated Wind Tunnel Turbulence. Phys. Rev. Lett. 97, 144507

A. Gylfason, S. Ayyalasomayajula, and Z. Warhaft 2004. Intermittency, Pressure and Acceleration Statistics from Hot-wire Anemometry in Wind Tunnel Turbulence. J. Fluid Mech. 501, 213-229.

A. Gylfason and Z. Warhaft 2004. On Higher Order Passive Scalar Structure Functions in Grid Turbulence. Phys. Fluids 16, 4012-4019.

Conference presentations, posters, papers and proceedings

B. Turkyilmaz, E. Bernard, J. Salort, F. Chilla, M. Bourgoin and Á. Gylfason Aug. 25-30, 2024. "Particle image thermometry and velocimetry for investigating Rayleigh-Benard turbulence". ICTAM 2024, 26th International Conference of the Theoretical and Applied Mechanics, Daegu, South Korea.

Y. Kanash, M. M. Quas, E. Peridon, L. Stebig, R. Cal, Á Gylfason. November 19-21, 2023. Effects of blade fouling on performance of vertical axis wind turbines. 76th Annual Meeting of the APS Division of Fluid Dynamics; Washington, DC.

A. Gylfason. September 4-29, 2023. Non-intrusive Lagrangian temperature measurements in convective turbulent flows. Invited Lecture: Hydrodynamics at all scales, Nordita, Stockholm, Sweden.

B. Turkyilmaz, E. Bernard, J.O. Rodríguez García, M. Bourgoin and A. Gylfason Sep. 11-15, 2023. "Non-intrusive temperature measurements in turbulent convection". THMT 23, 10th International Symposium on Turbulence, Heat and Mass Transfer, Rome, Italy. DOI: 10.1615/ICHMT.THMT-23.730.

Babak Ranjbaran, Yuri Kanash, Raúl Bayoán Cal, and Ármann Gylfason Sep. 4-6, 2023. An experimental study on the influence of gusts and suspended particles on the wake flow characteristics of wind turbines. ETC 18, European Turbulence Conference, Valencia, Spain.

B. Turkyilmaz, E. Bernard, J.O. Rodríguez García, M. Bourgoin and A. Gylfason Sep. 4-6, 2023. Non-intrusive and simultaneous measurements of the Lagrangian dynamics and the fluid temperature field applied to study of the thermal plumes in turbulent Rayleigh–Bénard convection. ETC 18, European Turbulence Conference, Valencia, Spain.

J.O. Rodriguez-Garcia, B. Ranjbaran, B. Turkyilmaz, and A. Gylfason. Nov. 20-22, 2022. Experimental calibration of thermal particles to study natural and mixed convective flow fields. 75th Annual Meeting of the APS Division of Fluid Dynamics, Volume 67, Number 19; Indianapolis, IN

B. Ranjbaran, J. Rodriguez-Garcia, B. Turkyilmaz and A. Gylfason Nov 20-22, 2022. Experimental study of the influence of gust and debris on flow characteristics of wind turbines. 75th Annual Meeting of the APS Division of Fluid Dynamics, Volume 67, Number 19; Indianapolis, IN.

B. Turkyilmaz, B. Ranjbaran, J.O. Rodriguez-Garcia, and A. Gylfason Nov . 20-22, 2022. Non-intrusive and simultaneous measurements of the Lagrangian dynamics and the fluid temperature field applied to the study of Natural Convection. 75th Annual Meeting of the APS Division of Fluid Dynamics, Volume 67, Number 19; Indianapolis, IN.

B. Turkyilmaz, B. Ranjbaran, J.O. Rodríguez-García, and A. Gylfason. June 15-17, 2022. Optimization of image processing for temperature measurements using Thermochromic Liquid Crystals. Turbulence and Interface – PC Henri Benard Workshop; Lyon, France

J.O. Rodríguez-García, B. Ranjbaran, B. Turkyilmaz, and A. Gylfason. June 19-22, 2022. Transport properties in experimental convection flows. 1st Spanish Fluid Mechanics Conference; Cádiz, Spain.

B. Turkyilmaz, B. Ranjbaran, J.O. Rodríguez-García, and A. Gylfason. Sept 13-16, 2022. Combining Lagrangian Particle tracking with temperature measurements using Thermocromic Liquid Crystals. EFMC14 – 14th European Fluid Mechanics Conference; Athens, Greece.

J.O. Rodríguez-García, B. Turkyilmaz, B. Ranjbaran, and A. Gylfason. Sep. 13-16, 2022. Lagrangian tracking and temperature measurements in natural and mixed convective flow fields. EFMC14 – 14th European Fluid Mechanics Conference; Athens, Greece.

B. Ranjbaran and A. Gylfason Nov 21-23, 2021. Airfoil selection for a small-scale vertical axis wind turbine; a numerical study. 74th Annual Meeting of the APS Division of Fluid Dynamics, Volume 66, Number 17; Phoenix, AZ.

J.O. Rodriguez-Garcia, M. Viallet, C. Deleforge, V. Monleon, and A. Gylfason. Nov. 21-23, 2021. On the transport properties of natural and mixed convective flow fields. 74th Annual Meeting of the APS Division of Fluid Dynamics, Volume 66, Number 17; Phoenix, AZ.

C. Lee, A. Gylfason, F. Toschi Nov 23-26, 2019. Pair dispersion of particle during turbulence transition. 72th Annual Meeting of the APS Division of Fluid Dynamics; Seattle, WA

C. Lee, A. Gylfason, F. Toschi Nov 23-26, 2019. Pair dispersion of particle during turbulence transition. 72th Annual Meeting of the APS Division of Fluid Dynamics; Seattle, WA

A. Gayout, A. Gylfason, N. Plilon, M. Bourgoin. Nov 23-26, 2019. Pendulum in a flow: Case of balanced pendulum. 72th Annual Meeting of the APS Division of Fluid Dynamics; Seattle, WA

C. Lee, A. Gylfason, F. Toschi Nov 20-22, 2017. Particle dynamics at the onset of shear. 70th Annual Meeting of the APS Division of Fluid Dynamics; Denver, CO.

L. Bouhlali. Gylfason, Aug 25-28, 2017. Experimental investigation of mixed convection effects on the local convective heat flux in turbulent Rayleigh-Bénard convection. 16th European Turbulence Conference (ETC16). Stockholm, Sweden.

C. Lee, A. Gylfason, F. Toschi Nov 20-22, 2016. Particle dynamics during the transition from isotropic to anisotropic turbulence. 69th Annual Meeting of the APS Division of Fluid Dynamics; Portland, OR.
 

F. Toschi, A. Scagliarini, H. Einarsson, A. Gylfason, Nov 22-24, 2015. Buoyancy induced modication of the law-of-the-wall in an unstably stratied turbulent channel flow. 68th Annual Meeting of the APS Division of Fluid Dynamics; Boston, MA.

A. Gylfason M. Van Hinsberg, C. Lee, F. Toschi, Nov 22-24, 2015. Neutral and inertial particle acceleration in non-isotropic turbulent flows. 68th Annual Meeting of the APS Division of Fluid Dynamics; Boston, MA.

F. Toschi, A. Scagliarini, H. Einarsson, A. Gylfason, June 4, 2015. Law of the wall in an unstably stratified turbulent channel flow. International Conference on Raileigh-Bénard Turbulence, Göttingen, Germany.

A. Scagliarini, H. Einarsson, A. Gylfason, F. Toschi, Nov 24-26, 2014. Log-Law scaling of a convective boundary layer in an unstably stratified turbulent channel flow. 67th Annual Meeting of the APS Division of Fluid Dynamics; San Fransisco, CA.

A. Gylfason, March 17-21, 2014. Measurements of inertial particles in wind tunnel flows, in relation to cloud droplets. Invited Lecture: Of Rainfall and Marine Snow, Leiden, NL.

H. Einarsson, A. Scagliarini, L. Bouhlali, A. Gylfason, F. Toschi Nov 24-26, 2013. Small scale anisotropy in mixed convective turbulence. 66th Annual Meeting of the APS Division of Fluid Dynamics; Pittsburg, PA.

A. Gylfason, C.M. Lee, P. Perlekar, F Toschi, July. 1-5, 2013. Effects of flow anisotropy on Lagrangian statistics. CostMP0803 Particles in Turbulence 2013; Eindhoven, the Netherlands.

C.M. Lee, A. Gylfason, P. Perlekar, F Toschi, July. 1-5, 2013. Spatial effects on inertial particles in turbulence. CostMP0803 Particles in Turbulence 2013; Eindhoven, the Netherlands.

A. Scagliarini, A. Gylfason, F Toschi, July. 1-5, 2013. Heat transport through rodlike polymers solutions in mixed convection CostMP0803 Particles in Turbulence 2013; Eindhoven, the Netherlands.

A. Scagliarini, A. Gylfason, F Toschi, Nov. 18-20, 2012. Heat transfer through suspensions of particles in turbulent convection. 65th Annual Meeting of the APS Division of Fluid Dynamics; San Diego, CA.

C. Lee, A. Gylfason, P. Perlekar, F Toschi, Nov. 18-20, 2012. Spatial effects of flow straining on inertial particles in turbulence. 65th Annual Meeting of the APS Division of Fluid Dynamics; San Diego, CA.

D. Ivanov, L. Bouhlali, C. Lee, A. Gylfason, 2012. Lagrangian particle tracking in strained turbulence. Particles in complex flows 2012, Reykjavik, Iceland.

C. Lee, A. Gylfason, P. Perlekar, F Toschi, 2012. Spatial effects of strained turbulence on particle movements. Particles in complex flows 2012, Reykjavik, Iceland.

L. Leifsson, S. Koziel, F. Andrason, K. Magnusson, and A. Gylfason (2012) “Numerical Optimization and Experimental Validation of Low-Speed Wind Tunnel Contraction,” accepted, Int. Conf. Comp. Science, Omaha, Nebraska, June 4-6.

C. Lee, A. Gylfason, P. Perlekar, F Toschi. Direct numerical simulation of strained turbulence and particles within. College of Natural Sciences and Mathematics Faculty Research Symposium in California State University Long Beach.

C. Lee, A. Gylfason, P. Perlekar, F Toschi. Nov 14-17, 2011. Particle Behaviors in Strained Turbulence. SIAM Conference on Analysis of Partial Differential Equations, San Diego, CA.

D. Ivanov, L. Bouhlali, A. Gylfason, C. Lee. November 20-22, 2011. Lagrangian particle tracking in strained and buoyant flows. 64th Annual Meeting of the APS Division of Fluid Dynamics; Baltimore, ML.

A. Gylfason, C. Lee, P. Perlekar, F Toschi. November 20-22, 2011. Lagrangian motions and distribution of particles in strained turbulence. 64th Annual Meeting of the APS Division of Fluid Dynamics; Baltimore, ML.

A. Gylfason, C. Lee, P. Perlekar, F Toschi. September 12-15, 2011. Direct numerical simulation on strained turbulent
flows and particles within. European Turbulence Conference; Warsaw, Poland.

C. Lee P. Perlekar, F. Toschi and A. Gylfason. November 21-23, 2010. Direct numerical simulation of strained turbulence and particles within. 63rd Annual Meeting of the APS Division of Fluid Dynamics; Long Beach, California.

D. Ivanov, C. Lee, R.R. Gronkvist, and A. Gylfason November 21-23, 2010. Lagrangian particle tracking in strained turbulence. 63rd Annual Meeting of the APS Division of Fluid Dynamics; Long Beach, California.

P. Perlekar, C. Lee, F. Toschi and A. Gylfason. October 6-9, 2010. Direct numerical simulation of homogeneous straining flow. Werkgemeenschap Scientific Computing, Woudschoten, Netherlands.

C. Lee P. Perlekar, F. Toschi and A. Gylfason. May 25-28, 2010. Direct Numerical simulation of inertial particles in a strained turbulent flow. The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Dresden, Germany.

S. Ayyalasomayajula, A. Gylfason, Z. Warhaft, L. R. Collins and E. Bodenschatz Nov. 19-21, 2006. Experiments and models of inertial particles in high Reynolds number turbulence. American Physical Society Division of Fluid Dynamics Conference, Tampa Bay, FL.

S. Ayyalasomayajula, A. Gylfason, and Z. Warhaft. Sept. 11-14, 2006. Lagrangian measurements of fluid and inertial particles in decaying grid generated turbulence. IUTAM Symposium on Computational Physics and New Perspectives in Turbulence, Nagoya, Japan.

E. W. Saw, R. A. Shaw, S. Ayyalasomayajula, P. Y. Chuang, A. Gylfason, and Z. Warhaft. 12 July, 2006. Inertial clustering of droplets in high-reynolds-number laboratory turbulence. AMS 12th Conference on Atmospheric Pysics, Madison, FL.

S. Ayyalasomayajula, A. Gylfason, J. Salazar, Z. Warhaft, L. R. Collins and E. Bodenschatz July 17-20, 2006. Inertial Particle Accelerations in Turbulence: Experiments and Numerical Simulations. ASME Fluids Conference, Miami FL.

A. Gylfason, S. Ayyalasomayajula, and Z. Warhaft Nov. 20-22, 2005. Lagrangian Measurements of Inertial Particles in Wind Tunnel Turbulence. American Physical Society, Division of Fluid Dynamics Conference, Chicago, IL.

E. W. Saw, R. A. Shaw, S. Ayyalasomayajula, P.Y. Chuang and A. Gylfason. Nov. 20 – 22, 2005. Experimental study of scale-dependent droplet clustering in turbulence. American Physical Society, Division of Fluid Dynamics Conference, Chicago, IL.

Z. Warhaft, A. Gylfason and S. Ayyalasomayajula, Sept. 1-4, 2005. Preliminary Lagrangian Measurements of Inertial Particles in Wind Tunnel Turbulence. Challenging Turbulent Lagrangian Dynamics Conference, Rome, Italy.

A. Gylfason and Z. Warhaft Nov 21-23, 2004. High Reynolds Number Wind Tunnel Flow With Inertial Particles. American Physical Society, Division of Fluid Dynamics Conference, Seattle, WA.

Z. Warhaft and A. Gylfason June 29 - July 2, 2004. Passive Scalar Fine Scale Structure: Recent Results and Implications for the Velocity Field. 10th Euromech European Turbulence Conference. Trondheim, Norway.

A. Gylfason and Z. Warhaft Nov 23-25, 2003. On the Saturation of Scaling Exponents of Scalar Fields in Turbulent Flows. American Physical Society, Division of Fluid Dynamics Conference, Meadowlands NJ.

A. Gylfason and Z. Warhaft Nov 13-14, 2003. Inertial Particle Dynamics and Coalescence in Homogeneous Grid Turbulence. European Turbulence Network Meeting, Paris, France.

A. Gylfason, S. Ayyalasomayajula, and Z. Warhaft Nov 24-26, 2002. Turbulence Intermittency Characteristics in the Reynolds Number Range 100 < Rλ < 1000. American Physical Society, Division of Fluid Dynamics Conference, Dallas, TX.

Thesis

A. Gylfason, Jan 2006, Particles, Passive Scalars and the Small Scale Structure of Turbulence, Ph.D. thesis, Cornell University, Ithaca, NY.

Andmælandi við doktorsvörn:
David Dumont, ENS de Lyon 2021
Vivek Mugundhan; KAUST 2019

Stjórnarseta:
Rannsóknasjóður 2022-
Markáætlun 2024-