Dr Elena Marensi
PhD, FHEA
School of Mechanical, Aerospace and Civil Engineering
Lecturer in Fluid Mechanics
Faculty Director: Equality, Diversity and Inclusion and Wellbeing (Interim)
e.marensi@sheffield.ac.uk
+44 114 222 7734
+44 114 222 7734
D243 , Sir Frederick Mappin Building
Full contact details
Dr Elena Marensi
School of Mechanical, Aerospace and Civil Engineering
D243
Sir Frederick Mappin Building
Mappin Street
Sheffield
S1 3JD
School of Mechanical, Aerospace and Civil Engineering
D243
Sir Frederick Mappin Building
Mappin Street
Sheffield
S1 3JD
- Profile
-
I am a lecturer of Fluid Mechanics in the Department of Mechanical Engineering at the University of Sheffield. Prior to this, I was an ISTplus Fellow in the Nonlinear Dynamics & Turbulence group at the Institute of Science and Technology Austria and a PDRA in the School of Mathematics and Statistics at the University of Sheffield.
I hold a Ph.D. in Mechanical Engineering from the University of Sheffield, jointly with the A*Star Institute of High Performance Computing in Singapore. I obtained my Bachelor and Master degrees in Marine Engineering & Naval Architecture from the University of Genoa, Italy.
My research focuses on transition to turbulence in wall-bounded shear flows, flow instabilities, turbulence modelling and control, and flow optimisation. To tackle these problems I combine mathematical tools with high-fidelity computer simulations and data-driven approaches applied to both numerical and experimental data.
- Qualifications
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Fellow of the Higher Education Academy (FHEA) (2023)
- PhD in Fluid Mechanics, University of Sheffield, Department of Mechanical Engineering (2016)
- Master degree in in Marine Engineering & Naval Architecture, University of Genoa, School of Engineering (2012)
- Bachelor degree in Marine Engineering & Naval Architecture, University of Genoa, School of Engineering (2010)
- Research interests
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- Transition to Turbulence
- Flow Optimisation
- Turbulence control
- Stability analysis
- Nonlinear dynamics
- Data-driven analysis & modelling
- Publications
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Journal articles
- Prediction of heat transfer deterioration due to buoyancy. International Journal of Heat and Mass Transfer, 247, 127082-127082.
- Modelling the transition from shear-driven turbulence to convective turbulence in a vertical heated pipe. Mathematics, 13(2). View this article in WRRO
- Excitation and stability of nonlinear compressible Görtler vortices and streaks induced by free-stream vortical disturbances. Journal of Fluid Mechanics, 1000.
- The minimal seed for transition to convective turbulence in heated pipe flow. Journal of Fluid Mechanics, 997. View this article in WRRO
- Prediction of Heat Transfer Deterioration Due to Buoyancy.
- Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows. Journal of Fluid Mechanics, 974.
- Symmetry-reduced dynamic mode decomposition of near-wall turbulence. Journal of Fluid Mechanics, 954.
- Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. Nature Communications, 12. View this article in WRRO
- Suppression of turbulence and travelling waves in a vertical heated pipe. Journal of Fluid Mechanics, 919. View this article in WRRO
- Symmetry-reduced Dynamic Mode Decomposition of Near-wall Turbulence. View this article in WRRO
- Stabilising pipe flow by a baffle designed using energy stability. Journal of Fluid Mechanics, 902. View this article in WRRO
- Designing a minimal baffle to destabilise turbulence in pipe flows. Journal of Fluid Mechanics, 900. View this article in WRRO
- Upper edge of chaos and the energetics of transition in pipe flow. Physical Review Fluids, 5(2). View this article in WRRO
- Stabilisation and drag reduction of pipe flows by flattening the base profile – CORRIGENDUM. Journal of Fluid Mechanics, 888.
- Stabilisation and drag reduction of pipe flows by flattening the base profile. Journal of Fluid Mechanics, 863, 850-875. View this article in WRRO
- Growth and wall-transpiration control of nonlinear unsteady Görtler vortices forced by free-stream vortical disturbances. Physics of Fluids, 29(11). View this article in WRRO
- Nonlinear unsteady streaks engendered by the interaction of free-stream vorticity with a compressible boundary layer. Journal of Fluid Mechanics, 817, 80-121. View this article in WRRO
- Optimal body force for heat transfer in turbulent vertical heated pipe flow. Journal of Fluid Mechanics. View this article in WRRO
- Upper bound on angular momentum transport in Taylor-Couette flow. Physical Review E, 100(6).
Book chapters
- Effects of Streaky Structures on the Instability of Supersonic Boundary Layers, IUTAM Laminar-Turbulent Transition (pp. 587-598). Springer International Publishing
Conference proceedings
- NEW UNDERSTANDING OF HEAT TRANSFER DETERIORATION DUE TO BUOYANCY. Proceeding of International Heat Transfer Conference 17, 14 August 2023 - 18 August 2023.
- Two-scale interaction in near-wall turbulence. 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
- Two-scale interaction in near-wall turbulence. 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
- Nonlinear Response of a Compressible Boundary Layer to Free-stream Vortical Disturbances. Procedia IUTAM, Vol. 14 (pp 105-114)
Other
Preprints
- Optimal body force for heat transfer in turbulent vertical heated pipe flow, arXiv.
- Modelling the transition from shear-driven turbulence to convective turbulence in a vertical heated pipe, arXiv.
- Excitation and stability of nonlinear compressible Görtler vortices and streaks induced by free-stream vortical disturbances, arXiv.
- Laminarising turbulent pipe flow by linear and nonlinear optimisation, arXiv.
- The minimal seed for transition to convective turbulence in heated pipe flow, arXiv.
- Discontinuous transition to shear flow turbulence, arXiv.
- Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows, arXiv.
- Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas, arXiv.
- Designing a minimal baffle to destabilise turbulence in pipe flows, arXiv.
- Upper edge of chaos and the energetics of transition in pipe flow, arXiv.
- Stabilisation and drag reduction of pipe flows by flattening the base
profile, arXiv.
- Prediction of heat transfer deterioration due to buoyancy. International Journal of Heat and Mass Transfer, 247, 127082-127082.
- Teaching interests
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- MEC449: Advanced Engineering Fluid Dynamics
- MEC320: Computational Fluid Dynamics
- Professional activities and memberships
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- (2023 – present) Co-lead of the UK Fluid Network (UKFN) Special Interest Group on “Flow instability, modelling and control”.
- (2022 – present) Member of the UK Turbulence Consortium