Expertise
Areas of Specialization
Research Clusters
Current status
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Accepting graduate students
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Associate Professor
Mechanical Engineering
Overview
My research is in studying fluid mechanics both experimentally and using computational fluid dynamics (CFD). I have a particular interest in flows with additional complex physical and chemical interactions – these include:
Hydrodynamics of blades in rowing, sprint canoe & kayak and aero-hydrodynamics in sailing. Current interest includes coupling equipment flows and forces with athlete biomechanics.
Process metallurgical flows – Large-scales and high temperatures make measurements and experiments extremely challenging. But the diverse combinations of multiphase flows, heat and mass transfer, buoyancy and chemical reactions make metallurgical flows difficult to model. In particular we are looking at:
- Flow and heat transfer in metals and slags in steelmaking
- Scrap heating and melting in furnace vessels
- Flow, deposition of inclusions and clog growth in casting nozzles
- Off-gas flow dynamics and post-combustion in furnaces
- Powder spreading in LPM 3D printing
Nuclear thermalhydraulics
- Corium flow and heat transfer in CANDU reactors under severe accident conditions
- Modeling molten salt flow and heat transfer in Small Modular Reactors
- Unsteadiness in axial channel flows
Wind turbine aerodynamics and loading
- High AOA dynamic pitch rates
- Blade interactions
- B.A.Sc., Queen’s University (Eng. Physics), 1990
- M.Sc., Queen’s University (Mechanical), 1992
- Ph.D., University of Cambridge, 2003
Rezaee, M., David, D., Tullis, S., Lightstone, M., Analysis of heat transfer and solidification within CANDU corium, Annals of Nuclear Energy, 199, 110358, 2024
Rezaee, M., David, D., Tullis, S., Lightstone, M., Study of Influences of the Level of Zr Oxidation and Volumetric Heat Generation on Heat Transfer and Crust Formation Within CANDU Corium, Nuclear Science and Engineering, 94, 2023
Rezaee, M., David, D., Lightstone, M., Tullis, S., Analysis of natural convection heat transfer and solidification within a corium simulant, Nuclear Engineering and Design, 409, 112318, 2023
Shibly, K., Tullis, S., Phillion A., Non-metallic inclusion deposition in a slide-gate submerged entry nozzle, IOP Conference Series: Materials Science and Engineering, 1281, 2023
Heavenrich, S. & Tullis, S. Real-Time on-Water Estimation of a Sprint Canoe Paddle Path, ISEA 2022 The Engineering of Sport 14, Purdue University, 2022
Ballyk, M., Lightone, M., Tullis, S., Numerical Modelling the Effect of Appendages on Turbulent Mixing in Connected Nuclear Fuel Subchannels, Nuclear Engineering and Design, 395, 111788, 2022
Lightstone, Max., Koshy, P., Tullis, S. High-coherence jets for focus fluid delivery in grinding, CIRP Annals, 70, 1, 293, 2021
Tullis, S. Galipeau, C. Fully Coupled Modeling of Athlete Force Application and Power Transfer in Rowing Ergometry Procedia Engineering, 49, 108, 2020
Tullis, S. Galipeau, C. and Morgoch, D., Detailed on-water measurements of blade forces and stroke efficiencies in sprint canoe, Procedia Engineering, 2(6), 2018
Morgoch, D., Galipeau, C. and Tullis, S. Sprint canoe blade hydrodynamics – modeling and on-water measurement, Procedia Engineering, 147, 299-304, 2016
Murray, S., Lightstone, M. and Tullis, S., Target Lagrangian kinematic simulation for particle-laden flows, Physical Review E, 94(3), 2016
Murray, S., Lightstone, M. and Tullis, S., Single-Particle Lagrangian and Structure Statistics in Kinematically Simulated Particle-Laden Turbulent Flows, Physics of Fluids, 28(3), 033302, 2016
Zaretsky, A., Lightstone M. and Tullis, S. Simulation of Intersubchannel Mixing in a Triangular Nuclear Fuel Bundle Geometry, Nuclear Engineering and Design, 295, 305-316, 2015
Cernick, M., Tullis, S. and Lightstone, M., Particle subgrid scale modeling in large-eddy simulation of particle-laden turbulence, J. Turbulence, 16, 2, 101-135, 2014
Brown, S., Wang, J., Ho, H. and Tullis, S., Numeric Simulation of Fluid Structure Interaction in the Aortic Arch, Computational Biomechanics for Medicine, ed Wittek, Springer, 2013
Tullis, S., Korabi A. and Deeks I., NOx Sources and Production in a Consteel Electric Arc Furnace, Association for Iron & Steel Technology AISTech, 2013
Wang, J., Weaver, D. and Tullis, S., Simplified fluid-structure model for duckbill valve flow, J. Pressure Vessel Technology, 134, 4, 2012
McLaren, K., Tullis, S. and Ziada, S., Measurement of high solidity vertical axis wind turbine aerodynamic loads under high vibration response conditions, J. Fluids and Structures, 32, 2012
Armstrong, S., Fiedler, A. and Tullis, S., Flow separation on a high Reynolds number, high solidity vertical axis wind turbine with straight and canted blades and canted blades with fences, Renewable Energy, 41, 2012
McLaren, K., Tullis S. and Ziada S., Computational fluid dynamics simulation of the aerodynamics of a high solidity, small scale vertical axis wind turbine, Journal of Wind Energy, 15, 3, 2011
Sliasas, A. and Tullis, S., Modeling the effect of oar shaft bending during the rowing stroke, Proc. IMechE., Part P: J. Sports Engineering and Technology, 225, P4, 2011
Morgoch, D. and Tullis, S., Force analysis of a Sprint Canoe Blade, Proc. IMechE., Part P: J. Sports Engineering and Technology, 2011
Armstrong, S. and Tullis, S., Power performance of canted blades for vertical axis wind turbines, Journal of Renewable and Sustainable Energy, 3, 1, 2011
Brown, S., Wang, J, Tullis, S. Oscillatory Blood Flow in a Deformable Human Aortic Arch, ASME2011 Bioengineering Conf, 2011
Strutt H.C. Tullis S., Lightstone M., Issues Regarding Particle-Laden DNS of Homogeneous Isotropic Turbulence, Computers and Fluids, 40, 1, 2011
Kooiman, S. and Tullis, S., Response of a Vertical Axis Wind Turbine to Time Varying Wind Conditions found within the Urban Environment, Wind Engineering, 34, 4, 2010
Sliasas, A. and Tullis S., A hydrodynamics-based model of a rowing stroke simulating effects of drag and lift on oar blade efficiency for various cant angles, 8th Intl Conf on the Engineering of Sport, Austria, 2010
Sliasas, A. and Tullis S., The dynamic flow behaviour of an oar blade in motion using a hydrodynamics-based shell-velocity-coupled model of a rowing stroke, Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 224, 1, 2010
Wang J. and Tullis, S. Fluid structure interaction simulation of a 3D aortic arch model with pulsatile blood flow, 2010 Canadian Cardiovascular Congress, October 2010
Wang J., Weaver, D.S. and Tullis, S. Coupled Fluid-Structure Model for Duckbill Valve Flow, 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration & Noise / ASME 2010 3rd Joint US-European Fluids Engineering Meeting, 2010
McLaren K., Tullis, S. and Ziada, S. Vibration response behaviour of a high solidity, low rotational velocity, vertical axis wind turbine, 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration & Noise / ASME 2010 3rd Joint US-European Fluids Engineering Meeting, 2010
Sliasas, A. and Tullis S., Numerical modelling of rowing blade hydrodynamics, Sports Engineering (Springer), 11, 4, 2009
Fiedler, A. and Tullis, S., Blade Offset and Pitch Effects in a High Solidity Vertical Axis Wind Turbine, Wind Engineering, 33, 3, 237-246, 2009
Sliasas A. and Tullis S. A Hydrodynamic Investigation of the Rowing Stroke, 17th Canadian CFD Conference, Ottawa, 2009
Tullis, S. Kooiman S. Fiedler A. McLaren K. Armstrong S. Ziada S., Urban small wind turbine applications for reducing GHC emissions, 2nd Climate Change Technology Conference, 2008
Tullis, S. Fiedler A. McLaren K., Ziada S., Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments, VII World Wind Energy Association Conference, 2008
Shahbazian N. Tullis, S., Direct Numerical Simulation of Dilatation, Flame Strain and Curvature in Turbulent Premixed Flames, The Combustion Institute / Canadian Section Conference, 2008
Shahbazian N. Tullis, S., Dilatation, Flame Strain and Curvature in Turbulent Premixed Flames using Direct Numerical Simulation, 32nd International Combustion Symposium, 2008
Tullis S., Bravo R., Ziada S. Wind Tunnel Testing of a Small-scale, High-solidity Vertical Axis Wind Turbine, 23rd Ann. Conf. of the Canadian Wind Energy Association, Quebec, 2008
McLaren, K. Tullis, S. Ziada, S. Small-Scale Vertical Axis Wind Turbine Blade Optimization through Numerical Modelling Techniques, 23rd Ann. Conf. of the Canadian Wind Energy Association, Quebec, 2008
Kooiman, S. and Tullis, S. Performance Analysis of Vertical Axis Wind Turbines in the Urban Environment, 23rd Ann
. Conf. of the Canadian Wind Energy Association, Quebec, 2008
Fiedler, A. and Tullis, S. Aerodynamic Modifications of Boundary Layer Flows for Small Scale Vertical Axis Wind Turbines, 23rd Ann. Conf. of the Canadian Wind Energy Association, Quebec, 2008
McLaren, K. Tullis, S. Ziada, S. Vibration Analysis of a Vertical Axis Wind Turbine Blade, 21st Canadian Congress of Applied Mechanics CANCAM, 2007
Bravo R., Tullis S., Ziada S. Performance testing of a small vertical axis wind turbine, 21st Canadian Congress of Applied Mechanics CANCAM, 2007
Strutt H.C. Lightstone M.F. Tullis S.W., Numerically Simulated Particle-Laden Decaying Isotropic Turbulence, 15th Ann. Conf of CFD Society of Canada, 2007
Kooiman, S. and Tullis S.W., Wind power production in the urban environment, 15th Ann. Conf of CFD Society of Canada, 2007
McLaren, K. Tullis, S. Ziada, S. CFD simulations of dynamic thrust and radial forces on a vertical axis wind turbine blade, 15th Ann. Conf of CFD Society of Canada, 2007
Tullis, S., Dilatation and scalar flux in LES of turbulent premixed flames, The Combustion Institute / Canadian Section, Spring Technical Meeting, Banff, 2007
Tullis, S. Relationships between flame strains, dilatation and scalar flux transport in turbulent premixed flames, Canadian Society of Fluid Dynamics, York University, Toronto, 2006
Strutt H.C. Lightstone M.F. Tullis S.W., Numerical Simulation and Visualization of Decaying Isotropic Turbulence, 14th Ann. Conf of CFD Society of Canada, 2006
Tullis, S. and Cant, R.S., Large Eddy Simulation of scalar transport in turbulent premixed flames, The Combustion Institute / Canadian Section, Spring Technical Meeting, Halifax, 2006
Tullis, S., Jenkins, K, Cant, R.S., Yang, X, and Hayes, M., Grid-based technology applied to combustion CFD, UK e-Science All Hands Meeting, Nottingham, 2004
Tullis, S. and Cant, R.S., Scalar Transport Modelling in Large Eddy Simulation of Turbulent Premixed Flames, Ninth International Conference on Numerical Combustion, Sorrento, 2002
Tullis, S. and Cant, R.S., Scalar Transport Modelling in Large Eddy Simulation of Turbulent Premixed Flames, Proc. Comb. Inst., 29, 2097-2104, 2002
Tullis, S. and Cant, R.S., Counter-gradient scalar transport in large eddy simulation of turbulent premixed flames, IUTAM Symp. on Turbulent Mixing and Combustion, eds A. Pollard and S. Candel, 2001
Tullis, S. and Cant, R.S., A Priori Large Eddy Simulation of Scalar Transport in Turbulent Premixed Flames, 28th International Symposium on Combustion, Edinburgh, 2000
Pollard, A., Savill, A.M., Tullis, S. and Wang, X., Simulation of turbulent flow over thin element and flat valley V-shaped riblets, AIAA Journal, 34 (11), 2261-2268, 1996
Gunnewiek, L. and Tullis, S., Prediction of Heat and Fluid Flow in the Slag Bath of an Electric Arc Reduction Furnace, 35th Ann. Conf. of the Metallurgical Soc of Canadian Inst. of Metallurgy, Mining and Petroleum, Montreal, August, 1996
Pollard A., Tullis S., and Wang X., Skin Friction Drag Reduction: A Computational Study of Riblets, 2nd Annual Conf. of the Computational Fluid Dynamics Society of Canada, Toronto, 1994
Tullis, S. and Pollard, A., The time dependent flow over V- and U- groove riblets of different sizes, Physics of Fluids, 6 (3), March, 1994
Tullis, S. and Pollard, A., A numerical investigation of the turbulent flow over V and U groove riblets using a viscous wall region model, Near Wall Turbulent Flows, ed So, R.M.C., Speziale, C.G., and Launder, B.E., Elsevier, 1993
Tullis, S. and Pollard, A., Modelling the time dependent flow over V and U groove riblets, 13th Turbulence Symposium, University of Missouri-Rolla, September, 1992
Tullis, S. and Pollard, A., Modelling the time dependent flow over riblets in the viscous wall region, Fourth European Turbulence Conference, Delft University of Technology, The Netherlands, June, 1992
Tullis, S. and Pollard, A., Modelling the flow over riblets including their effects on near-wall turbulent eddies, 6th European Drag Reduction Working Meeting, Eindhoven, The Netherlands, November, 1991
Tullis, S. and Pollard, A., Modelling of drag reduction by passive means, Second North American-Soviet Workshop on Computational Aerodynamics, Montreal, 1991
