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)
+44 114 222 7737
Full contact details
School of Mechanical, Aerospace and Civil Engineering
D244
Sir Frederick Mappin Building
Mappin Street
Sheffield
S1 3JD
- Profile
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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
- Excitation and stability of nonlinear compressible Görtler vortices and streaks induced by free-stream vortical disturbances. Journal of Fluid Mechanics, 1000.
- 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
- The minimal seed for transition to convective turbulence in heated pipe flow. Journal of Fluid Mechanics.
- Upper bound on angular momentum transport in Taylor-Couette flow. Physical Review E, 100(6).
Chapters
- Effects of Streaky Structures on the Instability of Supersonic Boundary Layers, IUTAM Laminar-Turbulent Transition (pp. 587-598). Springer International Publishing
Conference proceedings papers
- 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)
Preprints
- 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.
- Stabilisation and drag reduction of pipe flows by flattening the base
profile, arXiv.
- Excitation and stability of nonlinear compressible Görtler vortices and streaks induced by free-stream vortical disturbances. Journal of Fluid Mechanics, 1000.
- 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