We will continue with our Seminar Series on March 22nd, 2024
On site: Salón de Grados Leganés
For the next event in the Aerospace PhD Seminar Series, we will have the pleasure of hosting Prof. Gioacchino Cafiero, professor at the Politecnico di Torino.
The event will take place in the Salón de Grados on Friday, March 22nd at 1pm and will be streamed (Online).
Gioacchino Cafiero is Associate Professor at Politecnico di Torino. GC received his PhD in Aerospace Engineering from the University of Naples Federico II in 2016, with honors. GC has developed extensive experience in turbulent flows modelling and flow control. In particular, GC has worked at the Unviersity of Cambridge (visiting researcher) on low order modelling of mixing and dispersion in turbulent flows, at Imperial College London (research fellow) on fundamental turbulence modelling in free shear flows, at the University of Surrey (lecturer) and Politecnico di Torino as assistant professor with tenure on artificial intelligence-based strategies for flow control. GC has also been involved as PI and Co-I in many funded projects, including the National Centre for Sustainable Mobility, concerning the Air Mobility activities (MOST, approximately 4.5M€ funding for PoliTO), PRIN 2022 (GREENER), PRIN 2022-PNRR (WATACO), H2020-CleanSky2 AG2 funded project and a EuHit Project. Currently GC is investigating the effects on unsteady inflow conditions on the performance of UAM vehicles through experimental methodologies, such as PIV, force measurements. He is also interested on the effects of turbulence lengthscales on the performance and noise emitted by propellers. GC has supervised 2 PhD students who have successfully completed their doctorate studies and several (>20) MSc students both in Italian (Politecnico di Torino, Università di Napoli Federico II) and UK institutions (Imperial College London, University of Surrey).
“ The drag reduction mechanism
of sinusoidal riblets in a turbulent boundary layer”
Abstract:
After a brief introduction on the research activities carried out at the Flow Control Group at Politecnico di Torino, the seminar will focus on the experimental and numerical investigation of microgrooves and their effects on the development of wall bounded flows at moderate values of the friction Reynolds number. Both the well-known streamwise aligned riblets as well as wavy riblets (characterised by a sinusoidal pattern in the mean flow direction) are considered. Previous investigations showed that wavy riblets yield larger values of drag reduction with respect to the streamwise aligned ones. The results suggest a fragmentation and/or weakening of the streaks in the sinusoidal cases, that is triggered by the larger values of the wall-normal vorticity found at the streaks’ edges. Furthermore, the numerical results allow to infer on the reorganization of the near wall structures owing to the geometry manipulation.
The seminars will begin at 1pm and will take place in the Auditorium Salón de Grados (Padre Soler) EPS Leganés.
No previous registration is required.
PhD in Aerospace Engineering UC3M 