R. Jason Hearst

Associate Professor

Department of Energy and Process Engineering Faculty of Engineering

jason.hearst@ntnu.no +47 91359427

Strømningsteknisk, 110, Gløshaugen, Kolbjørn Hejes vei 2

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 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)

On-going grants

2019 - 2022 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

Leon Li - The effects of free-stream turbulence on bluff bodies
Magnus Kyrkjebø Vinnes - Experimental comparison of actuator disk and rotating turbine wakes
Olav Rømcke - Dynamic shear jamming in a linear system
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 fellow

Md Kamruzzaman - Turbulence enhanced two species mixing (DiHI-Tech)
Pim Bullee - Turbulence enhanced scalar transport (WallMix)

Scientific, academic and artistic work

A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database

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. vol. 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. vol. 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. vol. 911.
Kamruzzaman, Md; Rømcke, Olav; Hearst, R. Jason. (2021) The impact of upstream turbulence on a plane jet. Experiments in Fluids. vol. 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. vol. 209.
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. vol. 6.
Vinnes, Magnus Kyrkjebø; Hearst, R. Jason. (2021) Aerodynamics of an airfoil with leading-edge icing. Wind Energy. vol. 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. vol. 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. vol. 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. vol. 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. vol. 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. vol. 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). vol. 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. vol. 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. vol. 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. vol. 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. vol. 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. vol. 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. vol. 375.
Hearst, R. Jason; Ganapathisubramani, Bharathram. (2017) Tailoring incoming shear and turbulence profiles for lab-scale wind turbines. Wind Energy. vol. 20 (12).

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