Pim Bullee
Background and activities
Starting from a broad engineering and natural sciences bachelor programme, I have specialized myself in fluid dynamics. I wrote my PhD thesis on an experimental study on drag of wall-bounded flows in the groups of Detlef Lohse and Rob Lammertink at the University of Twente in The Netherlands. I have experience working with complex setups and machinery, both on the large scales at which turbulence is typically studied, and on the smaller scale from working with microfluidic devices.
Right now I work with Jason Hearst and Masoud Asadi on scalar mixing in turbulence, where we use the large water channel in combination with a turbulence generating active grid. Next to this I am involved in other projects, where we for instance are looking into turbulence decay over long periods of time, the influence of turbulence on the transfer rate of dissolving oxygen at the gas-liquid interface (both with Jason Hearst), the existence of multiple states in the bulk flow of a Von Kármán mixing tank (with James Dawson and Farid Aligolzadeh), and am responsible for setting up an internal seminar series.
Scientific, academic and artistic work
Journal publications
- (2021) Characterizing the turbulent drag properties of rough surfaces with a Taylor–Couette set-up. Journal of Fluid Mechanics.
- (2021) Catastrophic Phase Inversion in High-Reynolds-Number Turbulent Taylor–Couette Flow. Physical Review Letters.
- (2020) Controlling secondary flow in Taylor–Couette turbulence through spanwise-varying roughness. Journal of Fluid Mechanics.
- (2020) Effect of axially varying sandpaper roughness on bubbly drag reduction in Taylor–Couette turbulence. International Journal of Multiphase Flow.
- (2020) Bubbly drag reduction using a hydrophobic inner cylinder in Taylor–Couette turbulence. Journal of Fluid Mechanics.
- (2018) Air cavities at the inner cylinder of turbulent Taylor–Couette flow. International Journal of Multiphase Flow.
- (2018) The influence of wall roughness on bubble drag reduction in Taylor–Couette turbulence. Journal of Fluid Mechanics.