Andrew Pollard PhD, P.Eng, FCAE, FASME, FAPS

While Professor Pollard became Emeritus as at January 1, 2017 following a highly successful 40 year career in academe, he remains active in research; however, he no longer trains either graduate students or post-docs. Professor Pollard's research interests are in computational and experimental fluid dynamics with particular interest in turbulence. His research seeks to uncover the physics of turbulence and attendant physical transport processes. Early work included modelling (Reynolds and Favre averaged) of processes that have in the past included combustion and radiation. Current work includes simulation (Direct and Large Eddy Simulation) of free round jets, incipient separation, flow in spacer filled channels, channel flows subject compressibility and pressure gradients and flow in the human airway and heart. His group has used Discontinuous Galerkin methods, Lattice Boltzmann methods and finite volume methods for their simulations. Analysis of data obtained from either DNS, LES or experiments is done using a variety of turbulence structure identification methods. Passive and active control of turbulence is used to enhance physical understanding. Professor Pollard's additional research is the introduction of low carbon fuels into industries that have traditionally relied on fossil fuels. This includes electricity generation, cement and other sectors that focus on solar PV, biomass and wind. He and his students have invented a novel torrefied and densified biomass pellet that has a United States Patent No. 9,701,086  Issue Date:  11 July 2017 and Canadian patent 2,850,975 Issued September 1 2020. 

Professor Pollard was a founding member, Associate Director and Director of the Centre for Advanced Gas Combustion Technology of Queen's University. He was a founding member and inaugural president of the CFD Society of Canada (http://www.cfdsc.ca). He was a founding member and the Principal Investigator of the High Performance Computing Virtual Laboratory, which has evolved into the Centre for Advanced Computing, (http://cac.queensu.ca) as well as a founding member, Chair of the Board of Directors and President of C3.ca Association Inc. (http://www.c3.ca). Compute/Calcul Canada (computecanada.org) builds on the success of C3.ca. He was the inaugural Director of the Collaborative Master's Programme in Computational Science and Engineering as well as the inaugural Director of the Sustainable Bio-economy Centre. 

• Turbulence 
• High Performance Computing 
• Experimental and numerical methods 
• Combustion and Mixing 
• Direct and Large Eddy Simulation 
• Passive Control Turbulence (Free and Wall-bounded) 
• Human Oropharyngeal flow 
• Multi-phase flow in the Human Heart (emboli) 
• Renewable and sustainable energy, incl. solar PV and biomass 

PLEASE NOTE: As at January 1, 2017 Professor Pollard no longer does any formal teaching. 

Only 2010-2022 provided. See my C.V. for complete list. 

2022 

• Samie, M., Aparece-Scutariu, V., Lavoie, P., Shin, D., & Pollard, A. (2022). Three-dimensional large-scale and very-large-scale coherent structures in a turbulent axisymmetric jet. Journal of Fluid Mechanics, 948, A29. https://doi:10.1017/jfm.2022.703 
• Dorostkar, A., Boegman, L., Schweitzer, S. A. and Pollard, A. Three-dimensional numerical simulation of basin-scale internal waves in a long narrow lake, Environmental Fluid Mechanics, https://doi.org/10.1007/s10652-022-09868-z 

2021 

• Samie, M., Lavoie, P., Pollard, A. Quantifying eddy structures and very-large-scale motions in turbulent round jets, Jn. Fluid Mechanics, Vol. 916, A2, https://doi.org/10.1017/jfm.2021.183 

2020 

• Samie, M., Lavoie, P. and Pollard, A. A scale-dependent coherence analysis of turbulent round jets including the effects of shear layer manipulation, Intl. Jn. Heat and Fluid Flow, Vol. 82, 2020, 108524. Samie et al.IJHFF 2020.pdf 

2019 

• Pollard, A. Turbulent Round Jet Entrainment – A Historical Perspective. Invited Contribution to Professor D.B. Spalding Commemorative Volume: 50 Years of CFD in Engineering Sciences, Runchal (ed.), Springer, 2019 Pollard2019.pdf  and  https://doi.org/10.1007/978-981-15-2670-1_8 

2018 

• Xu, M., Cheong, K-P., Mi, J. and Pollard, A. Local dissipation scales in turbulent jets, Experimental Thermal Fluid Science,May 2018, Vol. 93, Pages 178-185 https://doi.org/10.1016/j.expthermflusci.2017.12.019. 

• Sadeghi, H., Lavoie, P. and Pollard, A. Effects of finite hot-wire spatial resolution on turbulence statistics and velocity spectra in a round turbulent free jet, Experiments in Fluids, March 2018, Vol. 59, Pages 40-50, https://doi.org/10.1007/s00348-017-2486-8 

2017 

• T. Panidis, T., Pollard, A and Schwab, R.R. The role of vorticity in the near field development of sharp-edged,    rectangular, wall jets, International Journal of Heat and Fluid Flow, https://doi.org/10.1016/j.ijheatfluidflow.2017.06.010 
• Dorostkar, A., Boegman, L., and Pollard, A. “Three-dimensional simulation of high-frequency nonlinear internal in Cayuga Lake”, Journal of Geophysical Research: Oceans. January 2017 https://doi.org/10.1002/2016JC011862 
• Davis, J., Matovic, D. and Pollard, A. The performance of resistance, inductance, and capacitance handheld meters for determining moisture content of low-carbon fuels, Fuel, 188(15) January 2017, Pages 254-266 (http://www.sciencedirect.com/science/article/pii/S0016236116309723) 

2016 

• Pollard, A., L. Danaila, L. Castillo and M. Glauser (eds.), “Whither Turbulence and Big Data in the 21st Century?”, Springer Verlag, Berlin ISBN 978-3-319-41217-7  https://link.springer.com/book/10.1007/978-3-319-41217-7 
• Lavoie, P., Pollard, A. and Sadeghi, H. “Turbulence and Data Analytics in the 21st Century: The Round Free Jet.  In Press, Whither Turbulence and Big Data in the 21st Century? Pollard, Castillo, Danaila and Glauser (eds.) Springer Verlag, Berlin 2016 https://link.springer.com/book/10.1007/978-3-319-41217-7 
• Sadeghi, H., Lavoie P. and Pollard, A. “Scale-by-scale budget equation and its self-preservation in the shear-layer of a free round jet”, International Journal of Heat and Fluid Flow https://doi.org/10.1016/j.ijheatfluidflow.2016.03.005 

2015 

• Pollard, A. and P-A. Krogsted (eds.) Wall Turbulence: A colloquium under the midnight sun, Special Issue, J. Turbulence, June 2015 https://doi.org/10.1080/14685248.2015.1053347 
• Vouros, T. Panidis, A. Pollard and R. Schwab, Near field vorticity distributions from a sharp-edged rectangular jet, International Jn. Heat and Fluid Flow, https://doi:10.1016/j.ijheatfluidflow.2014.10.002 
• F. Secretain, A. Pollard, M. Uddin, C. Ball, M. Ali, B. Milne, A. Hamilton and R. Tanzola, A novel software program for in vivo detection of potential air emboli during cardiac surgery, J. Cardiac Ultrasound, 13:3, January 2015 https://doi:10.1186/1476-7120-13-3 
• Andrews, R., Pollard, A. and Pearce, J. “Photovoltaic System Performance Enhancement With Non-Tracking Planar Concentrators: Experimental Results and Bi-Directional Reflectance Function (BDRF) Based Modelling”, IEEE Journal of Photovoltaics, https://DOI:10.1109/JPHOTOV.2015.2478064 
• Sadeghi, H., Lavoie, P., & Pollard, A. (2015). Equilibrium similarity solution of the turbulent transport equation along the centreline of a round jet. Journal of Fluid Mechanics, 772, 740-755 https://doi:10.1017/jfm.2015.229 

• G. Leslie, A. Rutter, A. Pollard, J. Davis and D. Matovic, The Effects of Weathering on the Pyrolysis of Low-Carbon Fuels: Railway Ties and Asphalt Shingles, Fuel Processing Technology https://doi:10.1016/j.fuproc.2015.06.022 (June 2015) 

2014 

• H. Sadeghi, P. Lavoie and A. Pollard, The effect of Reynolds number on the scaling range along the centreline of a round turbulent jet, J. Turbulence, April 2014 https://DOI:10.1080/14685248.2014.906810 
• Andrews, R. W., Pollard, A., & Pearce, J. M. Photovoltaic system performance enhancement with non-tracking planar concentrators: Experimental results and BDRF based modelling. In 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC) (pp. 0229–0234). IEEE.    https://doi:10.1109/PVSC.2013.6744136 
• J. Davis, A. Pollard and A. J. Chandler, Comparison of Variability in Dioxin and Furan Data acquired using Single Train and Simultaneous Multiple Train Stack Sampling Methods, J. of the Air and Waste Management Assoc., https://doi.org/10.1080/10962247.2014.922518 

• G. Leslie, A. Pollard*, D. Matovic, Calorimetric and heat transfer studies of the spontaneous combustion of two low carbon fuels, J. Loss Prevention in the Process Industries, Vol 32:44-51, August, 2014 https://doi.org/10.1016/j.jlp.2014.07.006 
• D. Nicksy, A. Pollard, D. Strong and J. Hendry, In-Situ Torrefaction and Spherical Pelletization of Partially Pre-Torrefied Hybrid Poplar, J. Biomass and Bioenergy, Volume 70, November 2014, Pages 452–460  https://doi.org/10.1016/j.biombioe.2014.08.011 
• Pollard, F. Secretain and B. Milne Air and blood fluid dynamics: at the interface between engineering and medicine, J. Physics: Conference Series, Vol. 530 2014, https://doi:10.1088/1742-6596/530/1/012005 

2013 

• R. Andrews, A. Pollard and J. Pearce, A new method to determine the effects of hydrodynamic surface coatings on the snow shedding effectiveness of solar photovoltaic modules, Solar Energy Materials & Solar Cells 113 (2013) 71–78  https://doi.org/10.1016/j.solmat.2013.01.032 

• R. Andrews, A. Pollard and J. Pearce, The effects of snowfall on solar photovoltaic performance, J. Solar Energy, 92:84–97, Jun. 2013 https://doi.org/10.1016/j.solener.2013.02.014 
• M. Xu , A. Pollard, J. Mi, F. Secretain , H. Sadeghi, Effects of Reynolds number on some properties of a turbulent jet from a long square pipe, Phys. Fluids 25, 035102 (2013) https://doi.org/10.1063/1.4797456 
• Mahdavifar, A. Pollard, J. Pharoah and S. Beale, Wall Proximity Effects on Flow over a Simple Membrane Spacer, Computers and Fluids, Volume 88, December 2013, Pages 180–188. https://doi.org/10.1016/j.compfluid.2013.08.017 
• M. Mojab, A. Pollard, J. Pharoah, S. Beale and E. Hanff, Unsteady laminar to turbulent flow in a spacer filled channel, Flow, Turbulence and Combustion, October 2013. https://doi.org/10.1007/s10494-013-9514-4 
• J. Zhang, M. Xu, A. Pollard and J. Mi, Effects of external intermittency and mean shear on the spectral inertial-range exponent in a turbulent square jet, Physical Review E, 87(5) 2013. https://link.aps.org/doi/10.1103/PhysRevE.87.053009 

2012 

• H. Sadeghi and A. Pollard, Effects of shear layer and potential core modifications on turbulent round jet flow using passive control rings, Phys. Fluids 24, 115103 (2012); https://doi.org/10.1063/1.4767535 
• A-M. Shinneeb and A. Pollard, Investigation of the Flow Physics in Human Pharynx/Larynx Region, Experiments in Fluids, https://doi.org/10.1007/s00348-012-1336-y 
• C.G. Ball, H. Fellouah and A. Pollard, The Flow Field of a Turbulent Round Jet, Progress in Aerospace Sciences 50:1-26, February, 2012. https://doi.org/10.1016/j.paerosci.2011.10.002 
• L. Wei and A. Pollard, Direct numerical simulation of low Mach number turbulent wall bounded flow with favourable and adverse pressure gradients, J. Turbulence, https://doi.org/10.1080/14685248.2011.652305 

• Pollard, M. Uddin, A. Shinneeb and C. Ball, Recent Advances and Key Challenges in Investigations of the Flow Inside Human Oro-Pharyngeal-Laryngeal Airway Invited article for Special Issue of Multi-disciplinary CFD in Intl J. CFD, C. Mavriplis (ed) May 2012 https://doi:10.1080/10618562.2012.668616 
• A-M. Shinneeb and A. Pollard, Identification of Vortical Structures inside the Human Pharynx/Larynx Region from POD-Reconstructed Velocity Fields, Experiments in Fluids, March 2012 https://doi.org/10.1007/s00348-012-1293-5 
• Duncan, A. Pollard and H. Fellouah, Torrefied Biomass Pellets through the use of Experimental Design, J. Applied Energy, March 2012 http://dx.doi.org/10.1016/j.apenergy.2012.03.035, 
• R. Andrews, A. Pollard, and J. Pearce, Improved parametric empirical determination of module short circuit current for modelling and optimization of solar photovoltaic systems, Solar Energy, , May 2012 http://dx.doi.org/10.1016/j.solener.2012.04.016 

2011 

• D. Bespalko, A. Pollard and M. Uddin, Analysis of the pressure fluctuations from an LBM simulation of turbulent channel flow, Computers and Fluids, October 2011 doi:10.1016/j.compfluid.2011.10.008 
• L. Wei and A. Pollard, Direct numerical simulation of compressible turbulent channel flows using discontinuous Galerkin method, Computers and Fluids, 47(1):85-100, 2011. https://doi.org/10.1016/j.compfluid.2011.02.015 
• H. Raiesi, U. Piomelli and A. Pollard Evaluation of turbulence models using large-eddy simulation data, ASME, J. Fluids Engineering, February 2011 -- Volume 133, Issue 2, 021203 (10 pages) https://doi:10.1115/1.4003425 
• L. Wei and A. Pollard, Interactions among pressure, density, vorticity and their gradients in compressible turbulent channel flows, J. Fluid Mechanics, https://doi:10.1017/S0022112010006166  February 2011 

2010 

• R.K. Rowe, A. Hoor and A. Pollard, Examination of a Method for Reducing the Temperature of MSW Landfill Liners, ASCE, J. Environmental Engineering, 136(8): 794-803. https://doi:10.1061/(ASCE)EE.1943-7870.0000212  (2010) 
• D. Bespalko, A. Pollard and M. Uddin Direct numerical simulation of fully-developed turbulent channel flow using lattice Boltzmann method and analysis of OpenMP scalability, High Performance Computing Systems and Application, Lecture Notes in Computer Science, volume LNCS 5976, 2010, pp 1-19   https://doi.org/10.1007/978-3-642-12659-8_1 
• L. Wei and A. Pollard, Direct numerical simulation of a turbulent flow with pressure gradients, Progress in Turbulence III, Proceedings of the iTi Conference in Turbulence 2008, Springer Proceedings in Physics , Vol. 131, Peinke, Joachim; Oberlack, Martin; Talamelli, Alessandro (Eds.) 2010  https://doi.org/10.1007/978-3-642-02225-8_31 

I have successfully managed well over $50,000,000 of research funding throughout my career. Please see my C.V. for a partial listing 

Recognitions: 

• Fellow, Canadian Academy of Engineering 
• Fellow, American Society of Mechanical Engineers 
• Fellow, American Physical Society 
• Alumni Achievement Medal, Academic Excellence, University of Waterloo (2017) 

I have successfully supervised over 80 M.Sc., Ph.D. and Post doctoral fellows. See my C.V. for full list 

None Available