R. Jason Hearst
About
Research
My research is focussed on the experimental measurement of turbulent flows. Some topics that I am actively pursuing are:
- The generation of bespoke turbulence at high Reynolds numbers.
- The interaction of turbulence at a gas-liquid (air-sea) interface.
- The impact of turbulence on various geometries (e.g., airfoils, buildings, wind turbines).
- The influence of free-stream turbulence on a turbulent boundary layer.
- The instantaneous structure of turbulent shear flows.
Visit my group's webpage for more details.
Academic background
2015 - 2017 Post-doctoral fellowship, University of Southampton
2009 - 2014 PhD, University of Toronto Instititute for Aerospace Studies
2005 - 2009 BASc, University of Toronto, Engineering Science (Aerospace)
Grants
2022 - 2027 European Research Council - ERC Starting Grant - GLITR - Breaking Through: The Impact of Turbulence on the Gas-Liquid Interface
2019 - 2024 Research Council of Norway - FRINATEK - WallMix - Near-wall mixing by free-stream turbulence
2018 - 2021 Research Council of Norway - CLIMIT - DiHI-Tech - Distributed hydrogen injection and combustion technology for next generation pre-combustion CCS schemes
PhD candidates
- Magnus Kyrkjebø Vinnes - Experimental comparison of actuator disk and rotating turbine wakes
- Masoud Asadi - Turbulence enhanced scalar transport (WallMix)
- Dinis Nunes - Mixing in non-Newtonian systems
- Yannick Jooss (primary supervisor Tania Bracchi) - Understanding urban wind energy resources
- Johannes Næsset Hillestad (primary supervisor Nicholas Worth) - Volumetric rotating wake measurements
- Oddbjørn Kildal (primary supervisor Ole Øiseth) - Effect of turbulence on bridge decks
Post-doctoral fellows
- Pim Bullee - Turbulence enhanced scalar transport (WallMix)
- Ingrid Neunaber - Interactions between turbulence and wind turbines
- Leon Li - The impact of turbulence on gas-liquid interfaces (GLITR)
- Olav Rømcke (primary supervisor Simen Ellingsen) - Wave-turbulence interactions
- Bala Ganesan (co-supervised with James Dawson) - Rotating bodies in turbulence flows
- Yi Hui Tee (co-supervised with James Dawson) - Particles in turbulence
Publications
2022
- Asadi, Masoud; Kamruzzaman, Md; Hearst, Robert Jason. (2022) The effect of inlet turbulence on the quiescent core of turbulent channel flow. Journal of Fluid Mechanics. volum 935.
- Jooss, Yannick; Bolis, Roberto; Bracchi, Tania; Hearst, R. Jason. (2022) Flow field and performance of a vertical-axis wind turbine on model buildings. Flow. volum 2.
- Jooss, Yannick; Rønning, Eivind Berg; Hearst, Robert Jason; Bracchi, Tania. (2022) Influence of position and wind direction on the performance of a roof mounted vertical axis wind turbine. Journal of Wind Engineering and Industrial Aerodynamics. volum 230.
- Simões Nunes, Ângelo Dinis; Sierra-Pallaras, José; Tran, Quang Khanh; Hearst, Robert Jason. (2022) Development of an aqueous lignin mixture thermophysical model for hydrothermal liquefaction applications using uncertainty quantification tools. Chemical Engineering Science (CES). volum 261.
- Vinnes, Magnus Kyrkjebø; Gambuzza, Stefano; Ganapathisubramani, Bharathram; Hearst, Robert Jason. (2022) The far wake of porous disks and a model wind turbine: Similarities and differences assessed by hot-wire anemometry. Journal of Renewable and Sustainable Energy. volum 14.
2021
- Hearst, Robert Jason; de Silva, Charitha; Dogan, Eda; Ganapathisubramani, Bharathram. (2021) Uniform-momentum zones in a turbulent boundary layer subjected to freestream turbulence. Journal of Fluid Mechanics. volum 915.
- Helvig, Sanne de Jong; Vinnes, Magnus Kyrkjebø; Segalini, Antonio; Worth, Nicholas; Hearst, R. Jason. (2021) A comparison of lab-scale free rotating wind turbines and actuator disks. Journal of Wind Engineering and Industrial Aerodynamics. volum 209.
- Jooss, Yannick; Li, Leon; Bracchi, Tania; Hearst, Robert Jason. (2021) Spatial development of a turbulent boundary layer subjected to freestream turbulence. Journal of Fluid Mechanics. volum 911.
- Kamruzzaman, Md; Rømcke, Olav; Hearst, R. Jason. (2021) The impact of upstream turbulence on a plane jet. Experiments in Fluids. volum 62.
- Li, Leon; Hearst, R. Jason. (2021) The influence of freestream turbulence on the temporal pressure distribution and lift of an airfoil. Journal of Wind Engineering and Industrial Aerodynamics. volum 209.
- Rømcke, Olav; Peters, Ivo R.; Hearst, R. Jason. (2021) Collision of dynamic jamming fronts in a dense suspension. Physical Review Fluids. volum 6 (10).
- Rømcke, Olav; Hearst, R. Jason; Peters, Ivo R.. (2021) Colliding jamming fronts in a dense suspension. 2021. ISBN 978-82-326-6812-0. Doktoravhandlinger ved NTNU (366).
- Rømcke, Olav; Peters, Ivo R.; Hearst, Robert Jason. (2021) Characterizing the surface texture of a dense suspension undergoing dynamic jamming. Experiments in Fluids.
- Rømcke, Olav; Peters, Ivo R.; Hearst, Robert Jason. (2021) Getting jammed in all directions: Dynamic shear jamming around a cylinder towed through a dense suspension. Physical Review Fluids. volum 6.
- Vinnes, Magnus Kyrkjebø; Hearst, R. Jason. (2021) Aerodynamics of an airfoil with leading-edge icing. Wind Energy. volum 24 (8).
2020
- Hann, Richard; Hearst, R. Jason; Sætran, Lars Roar; Bracchi, Tania. (2020) Experimental and numerical icing penalties of an S826 airfoil at low Reynolds numbers. Aerospace. volum 7 (46).
- Kozul, Melissa; Hearst, R. Jason; Monty, Jason P; Ganapathisubramani, Bharathram; Chung, Daniel. (2020) Response of the temporal turbulent boundary layer to decaying free-stream turbulence. Journal of Fluid Mechanics. volum 896.
- Li, Leon; Hearst, R. Jason; Ferreira, Manuel A.; Ganapathisubramani, Bharathram. (2020) The near-field of a lab-scale wind turbine in tailored turbulent shear flows. Renewable Energy. volum 149.
- Skeide, Arne Kilvik; Bardal, Lars Morten; Oggiano, Luca; Hearst, R. Jason. (2020) The significant impact of ribs and small-scale roughness on cylinder drag crisis. Journal of Wind Engineering and Industrial Aerodynamics. volum 202.
2019
- Aliferis, Alexander Dahl; Jessen, Marius Stette; Bracchi, Tania; Hearst, R. Jason. (2019) Performance and wake of a Savonius vertical‐axis wind turbine under different incoming conditions. Wind Energy. volum 22 (9).
- Aubrun, Sandrine; Bastankhah, M; Cal, Raúl Bayoán; Conan, B; Hearst, R. Jason; Hoek, D; Hölling, Michael; Huang, M; Hur, C; Karlsen, Benjamin; Neunaber, Ingrid; Obligado, Martin; Peinke, Joachim; Percin, M; Sætran, Lars Roar; Schito, Paolo; Schliffke, B; Sims-Williams, D; Uzol, Oguz; Vinnes, Magnus Kyrkjebø; Zasso, A. (2019) Round-robin tests of porous disc models. Journal of Physics: Conference Series (JPCS). volum 1256 (1).
- Baidya, Rio; Baars, W. J.; Zimmerman, Spencer; Samie, Milad; Hearst, R. Jason; Dogan, Eda; Mascotelli, Lucia; Zheng, X; Bellani, Gabriele; Talamelli, A.; Ganapathisubramani, Bharathram; Hutchins, Nicholas; Marusic, Ivan; Klewicki, Joe; Monty, Jason P. (2019) Simultaneous skin friction and velocity measurements in high Reynolds number pipe and boundary layer flows. Journal of Fluid Mechanics. volum 871.
- Dogan, Eda; Hearst, R. Jason; Hanson, Ronald; Ganapathisubramani, Bharathram. (2019) Spatial characteristics of a zero-pressure-gradient turbulent boundary layer in the presence of free-stream turbulence. Physical Review Fluids. volum 4 (8).
- Hearst, R. Jason. (2019) The Use of Active Grids in Experimental Facilities. Progress in Turbulence VIII.
- Li, Leon; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2019) The Mean Velocity of the Near-Field of a Lab-Scale Wind Turbine in Tailored Turbulent Shear Flows. Progress in Turbulence VIII.
- Vinnes, Magnus Kyrkjebø; Li, Leon; Hearst, R. Jason. (2019) PIV of the Flow Over a NREL S826 Airfoil Subjected to Different Ice Accretions. Progress in Turbulence VIII.
- Zimmerman, Spencer; Philip, Jimmy; Monty, Jason P; Talamelli, A.; Marusic, Ivan; Ganapathisubramani, Bharathram; Hearst, R. Jason; Bellani, Gabriele; Baidya, Rio; Samie, Milad; Zheng, X; Dogan, Eda; Mascotelli, Lucia; Klewicki, Joe. (2019) A comparative study of the velocity and vorticity structure in pipes and boundary layers at friction Reynolds numbers up to 10^4. Journal of Fluid Mechanics. volum 869.
2018
- Hearst, R. Jason; Dogan, Eda; Ganapathisubramani, Bharathram. (2018) Robust features of a turbulent boundary layer subjected to high-intensity free-stream turbulence. Journal of Fluid Mechanics. volum 851.
- Laskari, Angeliki; de Kat, Roeland; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2018) Time evolution of uniform moment zones in a turbulent boundary layer. Journal of Fluid Mechanics. volum 842.
2017
- Dogan, Eda; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2017) Modelling high Reynolds number wall-turbulence interactions in laboratory experiments using large-scale free-stream turbulence. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. volum 375.
- Hearst, R. Jason; Ganapathisubramani, Bharathram. (2017) Tailoring incoming shear and turbulence profiles for lab-scale wind turbines. Wind Energy. volum 20 (12).
2016
- Hearst, R. Jason; Dogan, Eda; Ganapathisubramani, Bharathram. (2016) Interaction layer between a turbulent boundary layer and freestream turbulence. Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows (ICJWSF2015).
- Hearst, R. Jason; Lavoie, Philippe. (2016) Effects of multi-scale and regular grid geometry on decaying turbulence. Journal of Fluid Mechanics. volum 803.
- Hearst, R. Jason; Lavoie, Philippe. (2016) Influence of an extended non-equilibrium region on far-field grid turbulence. Progress in Turbulence VI.
- Hearst, Robert Jason; Gomit, Guillaume; Ganapathisubramani, Bharathram. (2016) Effect of turbulence on the wake of a wall-mounted cube. Journal of Fluid Mechanics. volum 804.
2015
- Hearst, R. Jason; Ganapathisubramani, Bharathram. (2015) Quantification and adjustment of pixel-locking in Particle Image Velocimetry. Experiments in Fluids. volum 56 (10).
- Hearst, R. Jason; Lavoie, Philippe. (2015) The effect of active grid initial conditions on high Reynolds number turbulence. Experiments in Fluids. volum 56 (10).
- Hearst, R. Jason; Lavoie, Philippe. (2015) Velocity derivative skewness in fractal-generated, non-equilibrium grid turbulence. Physics of Fluids. volum 27 (7).
2014
- Hearst, R. Jason; Lavoie, Philippe. (2014) Decay of turbulence generated by a square-fractal-element grid. Journal of Fluid Mechanics. volum 741.
- Hearst, R. Jason; Lavoie, Philippe. (2014) Scale-by-scale energy budget in fractal element grid-generated turbulence. Journal of turbulence. volum 15 (8).
2012
- Hearst, R. Jason; Buxton, Oliver RH; Ganapathisubramani, Bharathram; Lavoie, Philippe. (2012) Experimental estimation of fluctuating velocity and scalar gradients in turbulence. Experiments in Fluids. volum 53 (4).
Journal publications
- Asadi, Masoud; Kamruzzaman, Md; Hearst, Robert Jason. (2022) The effect of inlet turbulence on the quiescent core of turbulent channel flow. Journal of Fluid Mechanics. volum 935.
- Jooss, Yannick; Bolis, Roberto; Bracchi, Tania; Hearst, R. Jason. (2022) Flow field and performance of a vertical-axis wind turbine on model buildings. Flow. volum 2.
- Jooss, Yannick; Rønning, Eivind Berg; Hearst, Robert Jason; Bracchi, Tania. (2022) Influence of position and wind direction on the performance of a roof mounted vertical axis wind turbine. Journal of Wind Engineering and Industrial Aerodynamics. volum 230.
- Simões Nunes, Ângelo Dinis; Sierra-Pallaras, José; Tran, Quang Khanh; Hearst, Robert Jason. (2022) Development of an aqueous lignin mixture thermophysical model for hydrothermal liquefaction applications using uncertainty quantification tools. Chemical Engineering Science (CES). volum 261.
- Vinnes, Magnus Kyrkjebø; Gambuzza, Stefano; Ganapathisubramani, Bharathram; Hearst, Robert Jason. (2022) The far wake of porous disks and a model wind turbine: Similarities and differences assessed by hot-wire anemometry. Journal of Renewable and Sustainable Energy. volum 14.
- Hearst, Robert Jason; de Silva, Charitha; Dogan, Eda; Ganapathisubramani, Bharathram. (2021) Uniform-momentum zones in a turbulent boundary layer subjected to freestream turbulence. Journal of Fluid Mechanics. volum 915.
- Helvig, Sanne de Jong; Vinnes, Magnus Kyrkjebø; Segalini, Antonio; Worth, Nicholas; Hearst, R. Jason. (2021) A comparison of lab-scale free rotating wind turbines and actuator disks. Journal of Wind Engineering and Industrial Aerodynamics. volum 209.
- Jooss, Yannick; Li, Leon; Bracchi, Tania; Hearst, Robert Jason. (2021) Spatial development of a turbulent boundary layer subjected to freestream turbulence. Journal of Fluid Mechanics. volum 911.
- Kamruzzaman, Md; Rømcke, Olav; Hearst, R. Jason. (2021) The impact of upstream turbulence on a plane jet. Experiments in Fluids. volum 62.
- Li, Leon; Hearst, R. Jason. (2021) The influence of freestream turbulence on the temporal pressure distribution and lift of an airfoil. Journal of Wind Engineering and Industrial Aerodynamics. volum 209.
- Rømcke, Olav; Peters, Ivo R.; Hearst, R. Jason. (2021) Collision of dynamic jamming fronts in a dense suspension. Physical Review Fluids. volum 6 (10).
- Rømcke, Olav; Peters, Ivo R.; Hearst, Robert Jason. (2021) Characterizing the surface texture of a dense suspension undergoing dynamic jamming. Experiments in Fluids.
- Rømcke, Olav; Peters, Ivo R.; Hearst, Robert Jason. (2021) Getting jammed in all directions: Dynamic shear jamming around a cylinder towed through a dense suspension. Physical Review Fluids. volum 6.
- Vinnes, Magnus Kyrkjebø; Hearst, R. Jason. (2021) Aerodynamics of an airfoil with leading-edge icing. Wind Energy. volum 24 (8).
- Hann, Richard; Hearst, R. Jason; Sætran, Lars Roar; Bracchi, Tania. (2020) Experimental and numerical icing penalties of an S826 airfoil at low Reynolds numbers. Aerospace. volum 7 (46).
- Kozul, Melissa; Hearst, R. Jason; Monty, Jason P; Ganapathisubramani, Bharathram; Chung, Daniel. (2020) Response of the temporal turbulent boundary layer to decaying free-stream turbulence. Journal of Fluid Mechanics. volum 896.
- Li, Leon; Hearst, R. Jason; Ferreira, Manuel A.; Ganapathisubramani, Bharathram. (2020) The near-field of a lab-scale wind turbine in tailored turbulent shear flows. Renewable Energy. volum 149.
- Skeide, Arne Kilvik; Bardal, Lars Morten; Oggiano, Luca; Hearst, R. Jason. (2020) The significant impact of ribs and small-scale roughness on cylinder drag crisis. Journal of Wind Engineering and Industrial Aerodynamics. volum 202.
- Aliferis, Alexander Dahl; Jessen, Marius Stette; Bracchi, Tania; Hearst, R. Jason. (2019) Performance and wake of a Savonius vertical‐axis wind turbine under different incoming conditions. Wind Energy. volum 22 (9).
- Aubrun, Sandrine; Bastankhah, M; Cal, Raúl Bayoán; Conan, B; Hearst, R. Jason; Hoek, D; Hölling, Michael; Huang, M; Hur, C; Karlsen, Benjamin; Neunaber, Ingrid; Obligado, Martin; Peinke, Joachim; Percin, M; Sætran, Lars Roar; Schito, Paolo; Schliffke, B; Sims-Williams, D; Uzol, Oguz; Vinnes, Magnus Kyrkjebø; Zasso, A. (2019) Round-robin tests of porous disc models. Journal of Physics: Conference Series (JPCS). volum 1256 (1).
- Baidya, Rio; Baars, W. J.; Zimmerman, Spencer; Samie, Milad; Hearst, R. Jason; Dogan, Eda; Mascotelli, Lucia; Zheng, X; Bellani, Gabriele; Talamelli, A.; Ganapathisubramani, Bharathram; Hutchins, Nicholas; Marusic, Ivan; Klewicki, Joe; Monty, Jason P. (2019) Simultaneous skin friction and velocity measurements in high Reynolds number pipe and boundary layer flows. Journal of Fluid Mechanics. volum 871.
- Dogan, Eda; Hearst, R. Jason; Hanson, Ronald; Ganapathisubramani, Bharathram. (2019) Spatial characteristics of a zero-pressure-gradient turbulent boundary layer in the presence of free-stream turbulence. Physical Review Fluids. volum 4 (8).
- Zimmerman, Spencer; Philip, Jimmy; Monty, Jason P; Talamelli, A.; Marusic, Ivan; Ganapathisubramani, Bharathram; Hearst, R. Jason; Bellani, Gabriele; Baidya, Rio; Samie, Milad; Zheng, X; Dogan, Eda; Mascotelli, Lucia; Klewicki, Joe. (2019) A comparative study of the velocity and vorticity structure in pipes and boundary layers at friction Reynolds numbers up to 10^4. Journal of Fluid Mechanics. volum 869.
- Hearst, R. Jason; Dogan, Eda; Ganapathisubramani, Bharathram. (2018) Robust features of a turbulent boundary layer subjected to high-intensity free-stream turbulence. Journal of Fluid Mechanics. volum 851.
- Laskari, Angeliki; de Kat, Roeland; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2018) Time evolution of uniform moment zones in a turbulent boundary layer. Journal of Fluid Mechanics. volum 842.
- Dogan, Eda; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2017) Modelling high Reynolds number wall-turbulence interactions in laboratory experiments using large-scale free-stream turbulence. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. volum 375.
- Hearst, R. Jason; Ganapathisubramani, Bharathram. (2017) Tailoring incoming shear and turbulence profiles for lab-scale wind turbines. Wind Energy. volum 20 (12).
- Hearst, R. Jason; Lavoie, Philippe. (2016) Effects of multi-scale and regular grid geometry on decaying turbulence. Journal of Fluid Mechanics. volum 803.
- Hearst, Robert Jason; Gomit, Guillaume; Ganapathisubramani, Bharathram. (2016) Effect of turbulence on the wake of a wall-mounted cube. Journal of Fluid Mechanics. volum 804.
- Hearst, R. Jason; Ganapathisubramani, Bharathram. (2015) Quantification and adjustment of pixel-locking in Particle Image Velocimetry. Experiments in Fluids. volum 56 (10).
- Hearst, R. Jason; Lavoie, Philippe. (2015) The effect of active grid initial conditions on high Reynolds number turbulence. Experiments in Fluids. volum 56 (10).
- Hearst, R. Jason; Lavoie, Philippe. (2015) Velocity derivative skewness in fractal-generated, non-equilibrium grid turbulence. Physics of Fluids. volum 27 (7).
- Hearst, R. Jason; Lavoie, Philippe. (2014) Decay of turbulence generated by a square-fractal-element grid. Journal of Fluid Mechanics. volum 741.
- Hearst, R. Jason; Lavoie, Philippe. (2014) Scale-by-scale energy budget in fractal element grid-generated turbulence. Journal of turbulence. volum 15 (8).
- Hearst, R. Jason; Buxton, Oliver RH; Ganapathisubramani, Bharathram; Lavoie, Philippe. (2012) Experimental estimation of fluctuating velocity and scalar gradients in turbulence. Experiments in Fluids. volum 53 (4).
Report/dissertation
- Rømcke, Olav; Hearst, R. Jason; Peters, Ivo R.. (2021) Colliding jamming fronts in a dense suspension. 2021. ISBN 978-82-326-6812-0. Doktoravhandlinger ved NTNU (366).
Part of book/report
- Hearst, R. Jason. (2019) The Use of Active Grids in Experimental Facilities. Progress in Turbulence VIII.
- Li, Leon; Hearst, R. Jason; Ganapathisubramani, Bharathram. (2019) The Mean Velocity of the Near-Field of a Lab-Scale Wind Turbine in Tailored Turbulent Shear Flows. Progress in Turbulence VIII.
- Vinnes, Magnus Kyrkjebø; Li, Leon; Hearst, R. Jason. (2019) PIV of the Flow Over a NREL S826 Airfoil Subjected to Different Ice Accretions. Progress in Turbulence VIII.
- Hearst, R. Jason; Dogan, Eda; Ganapathisubramani, Bharathram. (2016) Interaction layer between a turbulent boundary layer and freestream turbulence. Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows (ICJWSF2015).
- Hearst, R. Jason; Lavoie, Philippe. (2016) Influence of an extended non-equilibrium region on far-field grid turbulence. Progress in Turbulence VI.