Seminar Prof. Shervin Bagheri (KTH, Sweden) : Turbulence-Driven Surface Dynamics
Event details
| Date | 07.04.2025 |
| Hour | 16:15 › 17:15 |
| Speaker | Prof. Shervin Bagheri |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract:
Surfaces interacting with turbulent flows exhibit complex and often unexpected dynamics. In this talk, we explore how different types of surfaces—hairy, multiphase, and porous—respond to and modify the overlying turbulence.
We first examine hairy surfaces, where elastic filaments respond to shear stress fluctuations. When the timescales of turbulent forcing and filament response align, a strong interaction emerges, locally altering surface permeability and flow characteristics. Next, we consider multiphase surfaces with lubricant-infused grooves, where turbulence-driven instabilities generate surface waves, increasing drag and affecting heat transfer. Finally, we discuss porous surfaces, where permeability variations influence interfacial instabilities, modulating mass and momentum exchange and impacting scalar transport.
By understanding these turbulence-surface interactions, we gain insights into how surface properties dynamically evolve—offering new perspectives on flow control, drag reduction, and heat transfer enhancement.
Bio
Professor Bagheri’s research focuses on the interaction between flowing fluids and complex materials across different length and time scales, ranging from molecular aspects of triple-phase contact lines to turbulent flows over porous media. His main objective is to apply this understanding to control/sense flows and transport phenomenas. Shervin Bagheri received his PhD in Fluid Mechanics at Royal Institute of Technology (KTH) in Stockholm in 2010. In 2017, he was appointed as Wallenberg Academy Fellow and received the Future Research Leader award by Swedish Foundation for Strategic research (SSF). Since 2020, he is a member of the Young Academy of Sweden. In 2023, he received ERC Consolidator grant for studying lubricated surfaces in fluid flows.
Surfaces interacting with turbulent flows exhibit complex and often unexpected dynamics. In this talk, we explore how different types of surfaces—hairy, multiphase, and porous—respond to and modify the overlying turbulence.
We first examine hairy surfaces, where elastic filaments respond to shear stress fluctuations. When the timescales of turbulent forcing and filament response align, a strong interaction emerges, locally altering surface permeability and flow characteristics. Next, we consider multiphase surfaces with lubricant-infused grooves, where turbulence-driven instabilities generate surface waves, increasing drag and affecting heat transfer. Finally, we discuss porous surfaces, where permeability variations influence interfacial instabilities, modulating mass and momentum exchange and impacting scalar transport.
By understanding these turbulence-surface interactions, we gain insights into how surface properties dynamically evolve—offering new perspectives on flow control, drag reduction, and heat transfer enhancement.
Bio
Professor Bagheri’s research focuses on the interaction between flowing fluids and complex materials across different length and time scales, ranging from molecular aspects of triple-phase contact lines to turbulent flows over porous media. His main objective is to apply this understanding to control/sense flows and transport phenomenas. Shervin Bagheri received his PhD in Fluid Mechanics at Royal Institute of Technology (KTH) in Stockholm in 2010. In 2017, he was appointed as Wallenberg Academy Fellow and received the Future Research Leader award by Swedish Foundation for Strategic research (SSF). Since 2020, he is a member of the Young Academy of Sweden. In 2023, he received ERC Consolidator grant for studying lubricated surfaces in fluid flows.
Practical information
- General public
- Free